Merge branch '1.20.1' into 1.20.2

src/main/java/com/minelittlepony/unicopia/Affinity.java

@@ -2,8 +2,10 @@ package com.minelittlepony.unicopia;
 
 import java.util.Locale;
 
+import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
 import net.minecraft.util.StringIdentifiable;
+import net.minecraft.util.Util;
 
 public enum Affinity implements StringIdentifiable {
     GOOD(Formatting.BLUE, -1, 0),
@@ -20,10 +22,13 @@ public enum Affinity implements StringIdentifiable {
 
     public static final Affinity[] VALUES = values();
 
+    private final String translationKey;
+
     Affinity(Formatting color, int corruption, float alignment) {
         this.color = color;
         this.corruption = corruption;
         this.alignment = alignment;
+        this.translationKey = Util.createTranslationKey("affinity", Unicopia.id(name().toLowerCase(Locale.ROOT)));
     }
 
     @Override
@@ -36,7 +41,11 @@ public enum Affinity implements StringIdentifiable {
     }
 
     public String getTranslationKey() {
-        return this == BAD ? "curse" : "spell";
+        return translationKey;
+    }
+
+    public Text getDisplayName() {
+        return Text.translatable(getTranslationKey()).formatted(getColor());
     }
 
     public int getCorruption() {

src/main/java/com/minelittlepony/unicopia/Race.java

@@ -10,6 +10,7 @@ import com.google.common.base.Strings;
 import com.minelittlepony.unicopia.ability.Abilities;
 import com.minelittlepony.unicopia.ability.Ability;
 import com.minelittlepony.unicopia.ability.magic.Affine;
+import com.minelittlepony.unicopia.network.track.TrackableDataType;
 import com.minelittlepony.unicopia.util.RegistryUtils;
 import com.mojang.brigadier.context.CommandContext;
 import com.mojang.brigadier.exceptions.CommandSyntaxException;
@@ -44,6 +45,7 @@ public record Race (
     public static final String DEFAULT_ID = "unicopia:unset";
     public static final Registry<Race> REGISTRY = RegistryUtils.createDefaulted(Unicopia.id("race"), DEFAULT_ID);
     public static final Registry<Race> COMMAND_REGISTRY = RegistryUtils.createDefaulted(Unicopia.id("race/grantable"), DEFAULT_ID);
+    public static final TrackableDataType<Race> TRACKABLE_TYPE = TrackableDataType.RACE;
     public static final RegistryKey<? extends Registry<Race>> REGISTRY_KEY = REGISTRY.getKey();
     private static final DynamicCommandExceptionType UNKNOWN_RACE_EXCEPTION = new DynamicCommandExceptionType(id -> Text.translatable("commands.race.fail", id));
     private static final Function<Race, Composite> COMPOSITES = Util.memoize(race -> new Composite(race, null, null));

src/main/java/com/minelittlepony/unicopia/UTags.java

@@ -107,6 +107,7 @@ public interface UTags {
         TagKey<Block> MIMIC_CHESTS = block("mimic_chests");
 
         TagKey<Block> BUTTERFLIES_SPAWNABLE_ON = block("butterflies_spawn_on");
+        TagKey<Block> ANGERS_GUARDIANS = block("angers_guardians");
 
         private static TagKey<Block> block(String name) {
             return TagKey.of(RegistryKeys.BLOCK, Unicopia.id(name));

src/main/java/com/minelittlepony/unicopia/Unicopia.java

@@ -2,6 +2,7 @@ package com.minelittlepony.unicopia;
 
 import net.fabricmc.api.ModInitializer;
 import net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents;
+import net.fabricmc.fabric.api.event.player.PlayerBlockBreakEvents;
 import net.fabricmc.fabric.api.resource.ResourceManagerHelper;
 import net.minecraft.resource.ResourceType;
 import net.minecraft.util.Identifier;
@@ -22,6 +23,7 @@ import com.minelittlepony.unicopia.container.UScreenHandlers;
 import com.minelittlepony.unicopia.diet.DietsLoader;
 import com.minelittlepony.unicopia.diet.affliction.AfflictionType;
 import com.minelittlepony.unicopia.entity.damage.UDamageTypes;
+import com.minelittlepony.unicopia.entity.effect.SeaponyGraceStatusEffect;
 import com.minelittlepony.unicopia.entity.effect.UPotions;
 import com.minelittlepony.unicopia.entity.mob.UEntities;
 import com.minelittlepony.unicopia.item.UItems;
@@ -76,6 +78,7 @@ public class Unicopia implements ModInitializer {
                 Debug.runTests(w);
             }
         });
+        PlayerBlockBreakEvents.AFTER.register(SeaponyGraceStatusEffect::processBlockChange);
         NocturnalSleepManager.bootstrap();
 
         registerServerDataReloaders(ResourceManagerHelper.get(ResourceType.SERVER_DATA));

src/main/java/com/minelittlepony/unicopia/ability/AbilityDispatcher.java

@@ -172,6 +172,16 @@ public class AbilityDispatcher implements Tickable, NbtSerialisable {
         }
 
         public void tick() {
+            Optional<Ability<?>> activeAbility = getActiveAbility();
+
+            if (activeAbility.isEmpty()) {
+                if (warmup > 0) {
+                    warmup--;
+                }
+                if (cooldown > 0) {
+                    cooldown--;
+                }
+            }
             getActiveAbility().ifPresent(ability -> {
                 if (warmup > 0) {
                     warmup--;

src/main/java/com/minelittlepony/unicopia/ability/ChangeFormAbility.java

@@ -10,8 +10,10 @@ import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.ability.data.Hit;
 import com.minelittlepony.unicopia.advancement.UCriteria;
+import com.minelittlepony.unicopia.compat.trinkets.TrinketsDelegate;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.item.FriendshipBraceletItem;
+import com.minelittlepony.unicopia.item.UItems;
 
 import net.minecraft.particle.ParticleTypes;
 import net.minecraft.sound.SoundCategory;
@@ -73,6 +75,11 @@ public class ChangeFormAbility implements Ability<Hit> {
 
         List<Pony> targets = getTargets(player).toList();
         player.subtractEnergyCost(5 * targets.size());
+        TrinketsDelegate.EquippedStack amulet = UItems.PEARL_NECKLACE.getForEntity(player.asEntity());
+        if (!amulet.stack().isEmpty()) {
+            amulet.stack().damage(1, player.asEntity(), amulet.breakStatusSender());
+        }
+
         boolean isTransforming = player.getSuppressedRace().isUnset();
         targets.forEach(target -> {
             Race supressed = target.getSuppressedRace();

src/main/java/com/minelittlepony/unicopia/ability/ChangelingDisguiseAbility.java

@@ -51,7 +51,7 @@ public class ChangelingDisguiseAbility extends ChangelingFeedAbility {
 
         player.getEntityWorld().playSound(null, player.getBlockPos(), USounds.ENTITY_PLAYER_CHANGELING_TRANSFORM, SoundCategory.PLAYERS, 1.4F, 0.4F);
 
-        Disguise currentDisguise = iplayer.getSpellSlot().get(SpellType.CHANGELING_DISGUISE, true)
+        Disguise currentDisguise = iplayer.getSpellSlot().get(SpellType.CHANGELING_DISGUISE)
             .orElseGet(() -> SpellType.CHANGELING_DISGUISE.withTraits().apply(iplayer, CastingMethod.INNATE));
 
         if (currentDisguise.isOf(looked)) {
@@ -64,7 +64,6 @@ public class ChangelingDisguiseAbility extends ChangelingFeedAbility {
         }
 
         player.calculateDimensions();
-        iplayer.setDirty();
         return true;
     }
 

src/main/java/com/minelittlepony/unicopia/ability/EarthPonyStompAbility.java

@@ -6,9 +6,11 @@ import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.AwaitTickQueue;
 import com.minelittlepony.unicopia.Race;
+import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.UTags;
 import com.minelittlepony.unicopia.ability.data.Hit;
 import com.minelittlepony.unicopia.client.render.PlayerPoser.Animation;
+import com.minelittlepony.unicopia.entity.LandingEventHandler;
 import com.minelittlepony.unicopia.entity.Living;
 import com.minelittlepony.unicopia.entity.damage.UDamageTypes;
 import com.minelittlepony.unicopia.entity.player.Pony;
@@ -80,7 +82,9 @@ public class EarthPonyStompAbility implements Ability<Hit> {
     @Override
     public Optional<Hit> prepare(Pony player) {
         if (player.asEntity().getVelocity().y * player.getPhysics().getGravitySignum() < 0
-                && !player.asEntity().getAbilities().flying) {
+                && !player.asEntity().getAbilities().flying
+                && !player.asEntity().isFallFlying()
+                && !player.asEntity().isUsingRiptide()) {
             thrustDownwards(player);
             return Hit.INSTANCE;
         }
@@ -104,72 +108,88 @@ public class EarthPonyStompAbility implements Ability<Hit> {
 
     @Override
     public boolean apply(Pony iplayer, Hit data) {
-        PlayerEntity player = iplayer.asEntity();
+        final PlayerEntity player = iplayer.asEntity();
+        final double initialY = player.getY() + 5;
 
-        Runnable r = () -> {
-            BlockPos center = PosHelper.findSolidGroundAt(player.getEntityWorld(), player.getBlockPos(), iplayer.getPhysics().getGravitySignum());
-
-            float heavyness = 1 + EnchantmentHelper.getEquipmentLevel(UEnchantments.HEAVY, player);
-
-            iplayer.asWorld().getOtherEntities(player, areaOfEffect.offset(iplayer.getOriginVector())).forEach(i -> {
-                double dist = Math.sqrt(center.getSquaredDistance(i.getBlockPos()));
-
-                if (dist <= rad + 3) {
-                    double inertia = 2 / dist;
-
-                    if (i instanceof LivingEntity) {
-                        inertia *= 1 + EnchantmentHelper.getEquipmentLevel(UEnchantments.HEAVY, (LivingEntity)i);
-                    }
-                    inertia /= heavyness;
-
-                    double liftAmount = Math.sin(Math.PI * dist / rad) * 12 * iplayer.getPhysics().getGravitySignum();
-
-                    i.addVelocity(
-                            -(player.getX() - i.getX()) / inertia,
-                            -(player.getY() - i.getY() - liftAmount) / inertia + (dist < 1 ? dist : 0),
-                            -(player.getZ() - i.getZ()) / inertia);
-
-                    double amount = (1.5F * player.getAttributeInstance(EntityAttributes.GENERIC_ATTACK_DAMAGE).getValue() + heavyness * 0.4) / (float)(dist * 1.3F);
-
-                    if (i instanceof PlayerEntity) {
-                        Race.Composite race = Pony.of((PlayerEntity)i).getCompositeRace();
-                        if (race.canUseEarth()) {
-                            amount /= 3;
-                        }
-
-                        if (race.canFly()) {
-                            amount *= 4;
-                        }
-                    }
-
-                    if (i instanceof LivingEntity) {
-                        amount /= 1 + (EnchantmentHelper.getEquipmentLevel(UEnchantments.PADDED, (LivingEntity)i) / 6F);
-                    }
-
-                    i.damage(iplayer.damageOf(UDamageTypes.SMASH, iplayer), (float)amount);
-                    Living.updateVelocity(i);
+        var r = new LandingEventHandler.Callback() {
+            @Override
+            public float dispatch(float fallDistance) {
+                // fail if landing above the starting position
+                if (player.getY() > initialY) {
+                    return fallDistance;
                 }
-            });
 
-            double radius = rad + heavyness * 0.3;
+                player.fallDistance = 0;
+                BlockPos center = PosHelper.findSolidGroundAt(player.getEntityWorld(), player.getBlockPos(), iplayer.getPhysics().getGravitySignum());
 
-            spawnEffectAround(player, center, radius, rad);
+                float heavyness = 1 + EnchantmentHelper.getEquipmentLevel(UEnchantments.HEAVY, player);
 
-            ParticleUtils.spawnParticle(player.getWorld(), UParticles.GROUND_POUND, player.getX(), player.getY() - 1, player.getZ(), 0, 0, 0);
-            BlockState steppingState = player.getSteppingBlockState();
-            if (steppingState.isIn(UTags.Blocks.KICKS_UP_DUST)) {
-                ParticleUtils.spawnParticle(player.getWorld(), new BlockStateParticleEffect(UParticles.DUST_CLOUD, steppingState), player.getBlockPos().down().toCenterPos(), Vec3d.ZERO);
+                iplayer.asWorld().getOtherEntities(player, areaOfEffect.offset(iplayer.getOriginVector())).forEach(i -> {
+                    double dist = Math.sqrt(center.getSquaredDistance(i.getBlockPos()));
+
+                    if (dist <= rad + 3) {
+                        double inertia = 2 / dist;
+
+                        if (i instanceof LivingEntity) {
+                            inertia *= 1 + EnchantmentHelper.getEquipmentLevel(UEnchantments.HEAVY, (LivingEntity)i);
+                        }
+                        inertia /= heavyness;
+
+                        double liftAmount = Math.sin(Math.PI * dist / rad) * 12 * iplayer.getPhysics().getGravitySignum();
+
+                        i.addVelocity(
+                                -(player.getX() - i.getX()) / inertia,
+                                -(player.getY() - i.getY() - liftAmount) / inertia + (dist < 1 ? dist : 0),
+                                -(player.getZ() - i.getZ()) / inertia);
+
+                        double amount = (1.5F * player.getAttributeInstance(EntityAttributes.GENERIC_ATTACK_DAMAGE).getValue() + heavyness * 0.4) / (float)(dist * 1.3F);
+
+                        if (i instanceof PlayerEntity) {
+                            Race.Composite race = Pony.of((PlayerEntity)i).getCompositeRace();
+                            if (race.canUseEarth()) {
+                                amount /= 3;
+                            }
+
+                            if (race.canFly()) {
+                                amount *= 4;
+                            }
+                        }
+
+                        if (i instanceof LivingEntity) {
+                            amount /= 1 + (EnchantmentHelper.getEquipmentLevel(UEnchantments.PADDED, (LivingEntity)i) / 6F);
+                        }
+
+                        i.damage(iplayer.damageOf(UDamageTypes.SMASH, iplayer), (float)amount);
+                        Living.updateVelocity(i);
+                    }
+                });
+
+                double radius = rad + heavyness * 0.3;
+
+                spawnEffectAround(player, center, radius, rad);
+
+                ParticleUtils.spawnParticle(player.getWorld(), UParticles.GROUND_POUND, player.getX(), player.getY() - 1, player.getZ(), 0, 0, 0);
+                BlockState steppingState = player.getSteppingBlockState();
+                if (steppingState.isIn(UTags.Blocks.KICKS_UP_DUST)) {
+                    ParticleUtils.spawnParticle(player.getWorld(), new BlockStateParticleEffect(UParticles.DUST_CLOUD, steppingState), player.getBlockPos().down().toCenterPos(), Vec3d.ZERO);
+                }
+
+                iplayer.subtractEnergyCost(rad);
+                iplayer.asEntity().addExhaustion(3);
+                return 0F;
             }
 
-            iplayer.subtractEnergyCost(rad);
-            iplayer.asEntity().addExhaustion(3);
+            @Override
+            public void onCancelled() {
+                iplayer.playSound(USounds.GUI_ABILITY_FAIL, 1F);
+            }
         };
 
         if (iplayer.asEntity().isOnGround()) {
             iplayer.setAnimation(Animation.STOMP, Animation.Recipient.ANYONE, 10);
             iplayer.asEntity().jump();
             iplayer.updateVelocity();
-            AwaitTickQueue.scheduleTask(iplayer.asWorld(), w -> r.run(), 5);
+            AwaitTickQueue.scheduleTask(iplayer.asWorld(), w -> r.dispatch(0F), 5);
         } else {
             thrustDownwards(iplayer);
             iplayer.waitForFall(r);

src/main/java/com/minelittlepony/unicopia/ability/TimeChangeAbility.java

@@ -57,9 +57,7 @@ public class TimeChangeAbility implements Ability<Rot> {
             return false;
         }
 
-        if (player.getSpellSlot().contains(SpellType.TIME_CONTROL)) {
-            player.getSpellSlot().removeWhere(SpellType.TIME_CONTROL, true);
-        } else {
+        if (!player.getSpellSlot().removeWhere(SpellType.TIME_CONTROL)) {
             SpellType.TIME_CONTROL.withTraits().apply(player, CastingMethod.INNATE).update(player, data.applyTo(player));
         }
 

src/main/java/com/minelittlepony/unicopia/ability/ToggleFlightAbility.java

@@ -27,7 +27,7 @@ public class ToggleFlightAbility implements Ability<Hit> {
     @Nullable
     @Override
     public Optional<Hit> prepare(Pony player) {
-        return Hit.of(!player.asEntity().isCreative() && !player.getPhysics().getFlightType().isGrounded());
+        return Hit.of(!player.asEntity().hasVehicle() && !player.asEntity().isCreative() && !player.getPhysics().getFlightType().isGrounded());
     }
 
     @Override
@@ -65,7 +65,6 @@ public class ToggleFlightAbility implements Ability<Hit> {
         } else {
             player.getPhysics().cancelFlight(true);
         }
-        player.setDirty();
         player.setAnimation(Animation.SPREAD_WINGS, Animation.Recipient.ANYONE);
         return true;
     }

src/main/java/com/minelittlepony/unicopia/ability/UnicornCastingAbility.java

@@ -100,12 +100,21 @@ public class UnicornCastingAbility extends AbstractSpellCastingAbility {
 
             if (newSpell.getResult() != ActionResult.FAIL && canCast(newSpell.getValue().type())) {
                 CustomisedSpellType<?> spell = newSpell.getValue();
+                if (newSpell.getResult() == ActionResult.CONSUME) {
+                    CustomisedSpellType<?> equippedType = player.getCharms().getEquippedSpell(player.getCharms().getHand());
+                    if (equippedType.type() == spell.type()) {
+                        player.getCharms().equipSpell(player.getCharms().getHand(), spell);
+                    }
+                }
 
-                boolean removed = player.getSpellSlot().removeWhere(s -> {
-                    return s.findMatches(spell).findAny().isPresent() && (spell.isEmpty() || !SpellType.PLACED_SPELL.test(s));
-                }, true);
+                if (spell.isEmpty()) {
+                    return false;
+                }
+
+                boolean has = !spell.isStackable() && player.getSpellSlot().contains(spell);
+                boolean removed = !spell.isStackable() && player.getSpellSlot().removeWhere(spell.type());
                 player.subtractEnergyCost(removed ? 2 : 4);
-                if (!removed) {
+                if (!has) {
                     Spell s = spell.apply(player, CastingMethod.DIRECT);
                     if (s == null) {
                         player.spawnParticles(ParticleTypes.LARGE_SMOKE, 6);

src/main/java/com/minelittlepony/unicopia/ability/UnicornDispellAbility.java

@@ -7,7 +7,6 @@ import com.minelittlepony.unicopia.InteractionManager;
 import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.ability.data.Pos;
 import com.minelittlepony.unicopia.ability.magic.Caster;
-import com.minelittlepony.unicopia.ability.magic.SpellContainer.Operation;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
 import com.minelittlepony.unicopia.client.render.PlayerPoser.Animation;
 import com.minelittlepony.unicopia.entity.player.Pony;
@@ -93,11 +92,7 @@ public class UnicornDispellAbility implements Ability<Pos> {
     public boolean apply(Pony player, Pos data) {
         player.setAnimation(Animation.WOLOLO, Animation.Recipient.ANYONE);
         Caster.stream(VecHelper.findInRange(player.asEntity(), player.asWorld(), data.vec(), 3, EquinePredicates.IS_PLACED_SPELL).stream()).forEach(target -> {
-            target.getSpellSlot().forEach(spell -> {
-                spell.setDead();
-                spell.tickDying(target);
-                return Operation.ofBoolean(!spell.isDead());
-            }, true);
+            target.getSpellSlot().clear(false);
         });
         return true;
     }

src/main/java/com/minelittlepony/unicopia/ability/UnicornProjectileAbility.java

@@ -24,7 +24,7 @@ import net.minecraft.util.TypedActionResult;
 public class UnicornProjectileAbility extends AbstractSpellCastingAbility {
     @Override
     public int getWarmupTime(Pony player) {
-        return 8;
+        return 1;
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/ability/magic/Caster.java

@@ -8,6 +8,7 @@ import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.*;
 import com.minelittlepony.unicopia.ability.Ability;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.AreaProtectionSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
 import com.minelittlepony.unicopia.entity.*;
 import com.minelittlepony.unicopia.entity.damage.UDamageSources;
@@ -40,7 +41,7 @@ public interface Caster<E extends Entity> extends
 
     Physics getPhysics();
 
-    SpellContainer getSpellSlot();
+    SpellSlots getSpellSlot();
 
     /**
      * Removes the desired amount of mana or health from this caster in exchange for a spell's benefits.
@@ -111,7 +112,19 @@ public interface Caster<E extends Entity> extends
     }
 
     default boolean canCastAt(Vec3d pos) {
-        return !Ether.get(asWorld()).anyMatch(SpellType.ARCANE_PROTECTION, (spell, caster) -> spell.blocksMagicFor(caster, this, pos));
+        return !Ether.get(asWorld()).anyMatch(SpellType.ARCANE_PROTECTION, entry -> {
+            var target = entry.entity.getTarget().orElse(null);
+            if (target != null && target.pos().distanceTo(pos) <= entry.getRadius()) {
+                Caster<?> caster = entry.getCaster();
+                if (caster != null) {
+                    AreaProtectionSpell spell = entry.getSpell();
+                    if (spell != null) {
+                        return spell.blocksMagicFor(caster, this, pos);
+                    }
+                }
+            }
+            return false;
+        });
     }
 
     default boolean canUse(Ability<?> ability) {

src/main/java/com/minelittlepony/unicopia/ability/magic/Levelled.java

@@ -1,33 +1,32 @@
 package com.minelittlepony.unicopia.ability.magic;
 
+import java.util.function.IntConsumer;
 import java.util.function.IntSupplier;
 
 import net.minecraft.nbt.NbtCompound;
+import net.minecraft.util.math.MathHelper;
 
 /**
  * Object with levelling capabilities.
  */
 public interface Levelled {
-    LevelStore EMPTY = fixed(0);
+    LevelStore ZERO = of(0, 1);
 
-    static LevelStore fixed(int level) {
-        return of(() -> level);
-    }
-
-    static LevelStore of(IntSupplier supplier) {
+    static LevelStore of(IntSupplier getter, IntConsumer setter, IntSupplier max) {
         return new LevelStore() {
             @Override
             public int get() {
-                return supplier.getAsInt();
+                return getter.getAsInt();
             }
 
             @Override
             public void set(int level) {
+                setter.accept(level);
             }
 
             @Override
             public int getMax() {
-                return get();
+                return max.getAsInt();
             }
         };
     }
@@ -37,7 +36,9 @@ public interface Levelled {
     }
 
     static LevelStore fromNbt(NbtCompound compound) {
-        return of(compound.getInt("value"), compound.getInt("max"));
+        int max = Math.max(1, compound.getInt("max"));
+        int value = MathHelper.clamp(compound.getInt("value"), 0, max);
+        return of(value, max);
     }
 
     static LevelStore of(int level, int max) {
@@ -70,6 +71,9 @@ public interface Levelled {
         void set(int level);
 
         default float getScaled(float max) {
+            if (getMax() == 0) {
+                return max;
+            }
             return ((float)get() / getMax()) * max;
         }
 

src/main/java/com/minelittlepony/unicopia/ability/magic/MultiSpellSlot.java

@@ -0,0 +1,191 @@
+package com.minelittlepony.unicopia.ability.magic;
+
+import java.util.Optional;
+import java.util.UUID;
+import java.util.stream.Stream;
+
+import org.jetbrains.annotations.Nullable;
+
+import com.minelittlepony.unicopia.Unicopia;
+import com.minelittlepony.unicopia.ability.magic.spell.Spell;
+import com.minelittlepony.unicopia.ability.magic.spell.SpellReference;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
+import com.minelittlepony.unicopia.network.track.MsgTrackedValues;
+import com.minelittlepony.unicopia.network.track.ObjectTracker;
+import com.minelittlepony.unicopia.network.track.Trackable;
+import com.minelittlepony.unicopia.network.track.TrackableObject;
+import com.minelittlepony.unicopia.util.NbtSerialisable;
+import com.minelittlepony.unicopia.util.serialization.PacketCodec;
+
+import io.netty.buffer.Unpooled;
+import net.minecraft.nbt.NbtCompound;
+import net.minecraft.network.PacketByteBuf;
+
+/**
+ * Container for multiple spells
+ *
+ * @param <T> The owning entity
+ */
+class MultiSpellSlot implements SpellSlots, NbtSerialisable {
+    private final Caster<?> owner;
+    private final ObjectTracker<Entry<Spell>> tracker;
+
+    public MultiSpellSlot(Caster<?> owner) {
+        this.owner = owner;
+        this.tracker = Trackable.of(owner.asEntity()).getDataTrackers().checkoutTracker(() -> new Entry<>(owner));
+    }
+
+    public ObjectTracker<?> getTracker() {
+        return tracker;
+    }
+
+    @Override
+    public boolean contains(UUID id) {
+        return tracker.contains(id)
+            || tracker.values().stream().anyMatch(s -> s.spell.equalsOrContains(id));
+    }
+
+    @Override
+    public void put(@Nullable Spell effect) {
+        if (effect != null) {
+            tracker.add(effect.getUuid(), new Entry<>(owner, effect));
+        }
+    }
+
+    @Override
+    public void remove(UUID id, boolean force) {
+        tracker.remove(id, force);
+    }
+
+    @Override
+    public <T extends Spell> Stream<T> stream(@Nullable SpellPredicate<T> type) {
+        return tracker.values().stream().flatMap(s -> s.spell.findMatches(type));
+    }
+
+    @Override
+    public boolean clear(boolean force) {
+        return tracker.clear(force);
+    }
+
+    @Override
+    public void toNBT(NbtCompound compound) {
+        compound.put("spells", NbtSerialisable.writeMap(tracker.entries(), UUID::toString, entry -> entry.spell.toNBT()));
+    }
+
+    @Override
+    public void fromNBT(NbtCompound compound) {
+        tracker.load(NbtSerialisable.readMap(compound.getCompound("spells"), key -> {
+            try {
+                return UUID.fromString(key);
+            } catch (Throwable ignore) {}
+            return null;
+        }, (key, nbt) -> {
+            try {
+                Entry<Spell> entry = new Entry<>(owner);
+                entry.spell.fromNBT((NbtCompound)nbt);
+                return entry;
+            } catch (Throwable t) {
+                Unicopia.LOGGER.warn("Exception loading tracked object: {}", t.getMessage());
+            }
+            return null;
+        }));
+    }
+
+    static final class Entry<T extends Spell> implements TrackableObject<Entry<T>> {
+        private final Caster<?> owner;
+        final SpellReference<T> spell = new SpellReference<>();
+        private boolean hasValue;
+
+        public Entry(Caster<?> owner) {
+            this.owner = owner;
+        }
+        public Entry(Caster<?> owner, T spell) {
+            this.owner = owner;
+            this.spell.set(spell);
+            if (owner instanceof UpdateCallback callback) {
+                callback.onSpellAdded(spell);
+            }
+        }
+
+        @Override
+        public void discard(boolean immediate) {
+            if (immediate) {
+                spell.set(null, owner);
+            } else {
+                Spell s = spell.get();
+                if (s != null) {
+                    s.setDead();
+                    s.tickDying(owner);
+                }
+            }
+        }
+
+        @Override
+        public Status getStatus() {
+            boolean hasValue = spell.get() != null;
+            if (hasValue != this.hasValue) {
+                this.hasValue = hasValue;
+                return hasValue ? Status.NEW : Status.REMOVED;
+            }
+
+            return spell.hasDirtySpell() ? Status.UPDATED : Status.DEFAULT;
+        }
+
+        @Override
+        public void readTrackedNbt(NbtCompound nbt) {
+            spell.fromNBT(nbt);
+        }
+
+        @Override
+        public NbtCompound writeTrackedNbt() {
+            return spell.toNBT();
+        }
+
+        @Override
+        public void read(PacketByteBuf buffer) {
+            byte contentType = buffer.readByte();
+            if (contentType == 1) {
+                readTrackedNbt(PacketCodec.COMPRESSED_NBT.read(buffer));
+            } else {
+                T spell = this.spell.get();
+                if (spell != null) {
+                    spell.getDataTracker().load(new MsgTrackedValues.TrackerEntries(buffer));
+                }
+            }
+        }
+
+        @Override
+        public Optional<PacketByteBuf> write(Status status) {
+            if (status != Status.DEFAULT) {
+                PacketByteBuf buffer = new PacketByteBuf(Unpooled.buffer());
+                buffer.writeByte(1);
+                PacketCodec.COMPRESSED_NBT.write(buffer, spell.toNBT());
+                return Optional.of(buffer);
+            }
+            @Nullable T spell = this.spell.get();
+            if (spell == null) {
+                return Optional.empty();
+            }
+            return spell.getDataTracker().getDirtyPairs().map(entries -> {
+                PacketByteBuf buffer = new PacketByteBuf(Unpooled.buffer());
+                buffer.writeByte(0);
+                entries.write(buffer);
+                return buffer;
+            });
+        }
+
+        @Override
+        public void copyTo(Entry<T> destination) {
+            destination.spell.set(spell.get());
+        }
+    }
+
+    @Override
+    public void copyFrom(SpellSlots other, boolean alive) {
+        if (alive) {
+            other.stream().forEach(this::put);
+        } else {
+            other.stream().filter(SpellType.PLACE_CONTROL_SPELL).forEach(this::put);
+        }
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/SingleSpellSlot.java

@@ -0,0 +1,73 @@
+package com.minelittlepony.unicopia.ability.magic;
+
+import java.util.UUID;
+import java.util.stream.Stream;
+
+import org.jetbrains.annotations.Nullable;
+
+import com.minelittlepony.unicopia.ability.magic.spell.Spell;
+import com.minelittlepony.unicopia.network.track.Trackable;
+import com.minelittlepony.unicopia.util.NbtSerialisable;
+import net.minecraft.nbt.NbtCompound;
+
+/**
+ * Container for a single spell
+ *
+ * @param <T> The owning entity
+ */
+class SingleSpellSlot implements SpellSlots, NbtSerialisable {
+    private final Caster<?> owner;
+    private final MultiSpellSlot.Entry<Spell> entry;
+
+    public SingleSpellSlot(Caster<?> owner) {
+        this.owner = owner;
+        this.entry = new MultiSpellSlot.Entry<>(owner);
+        Trackable.of(owner.asEntity()).getDataTrackers().getPrimaryTracker().startTracking(entry);
+    }
+
+    @Override
+    public boolean contains(UUID id) {
+        return entry.spell.equalsOrContains(id);
+    }
+
+    @Override
+    public void put(@Nullable Spell effect) {
+        entry.spell.set(effect, owner);
+    }
+
+    @Override
+    public void remove(UUID id, boolean force) {
+        if (contains(id)) {
+            entry.discard(force);
+        }
+    }
+
+    @Override
+    public <T extends Spell> Stream<T> stream(@Nullable SpellPredicate<T> type) {
+        return entry.spell.findMatches(type);
+    }
+
+    @Override
+    public boolean clear(boolean force) {
+        if (entry.spell.get() != null) {
+            entry.discard(force);
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void toNBT(NbtCompound compound) {
+        compound.put("effect", entry.spell.toNBT());
+    }
+
+    @Override
+    public void fromNBT(NbtCompound compound) {
+        entry.spell.fromNBT(compound.getCompound("effect"));
+    }
+
+    @Override
+    public void copyFrom(SpellSlots other, boolean alive) {
+        other.get().ifPresent(this::put);
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/SpellContainer.java

@@ -1,97 +0,0 @@
-package com.minelittlepony.unicopia.ability.magic;
-
-import java.util.Optional;
-import java.util.UUID;
-import java.util.function.Function;
-import java.util.function.Predicate;
-import java.util.stream.Stream;
-import org.jetbrains.annotations.Nullable;
-
-import com.minelittlepony.unicopia.ability.magic.spell.Spell;
-
-public interface SpellContainer {
-    /**
-     * Checks if a spell with the given uuid is present.
-     */
-    boolean contains(UUID id);
-
-    /**
-     * Checks if any matching spells are active.
-     */
-    default boolean contains(@Nullable SpellPredicate<?> type) {
-        return get(type, true).isPresent();
-    }
-
-    /**
-     * Gets the active effect for this caster updating it if needed.
-     */
-    default <T extends Spell> Optional<T> get(boolean update) {
-        return get(null, update);
-    }
-
-    /**
-     * Gets the active effect for this caster updating it if needed.
-     */
-    <T extends Spell> Optional<T> get(@Nullable SpellPredicate<T> type, boolean update);
-
-    /**
-     * Sets the active effect.
-     */
-    void put(@Nullable Spell effect);
-
-    /**
-     * Cleanly removes a spell from this spell container.
-     *
-     * @param spellid ID of the spell to remove.
-     */
-    void remove(UUID spellid);
-
-    /**
-     * Removes all active effects that match or contain a matching effect.
-     *
-     * @return True if the collection was changed
-     */
-    default boolean removeIf(Predicate<Spell> test, boolean update) {
-        return removeWhere(spell -> spell.findMatches(test).findFirst().isPresent(), update);
-    }
-
-    /**
-     * Removes all matching top level active effects.
-     *
-     * @return True if the collection was changed
-     */
-    boolean removeWhere(Predicate<Spell> test, boolean update);
-
-    /**
-     * Iterates active spells and optionally removes matching ones.
-     *
-     * @return True if any matching spells remain active
-     */
-    boolean forEach(Function<Spell, Operation> action, boolean update);
-
-
-    /**
-     * Gets all active effects for this caster updating it if needed.
-     */
-    Stream<Spell> stream(boolean update);
-
-    /**
-     * Gets all active effects for this caster that match the given type updating it if needed.
-     */
-    <T extends Spell> Stream<T> stream(@Nullable SpellPredicate<T> type, boolean update);
-
-    /**
-     * Removes all effects currently active in this slot.
-     */
-    boolean clear();
-
-    public enum Operation {
-        SKIP,
-        KEEP,
-        REMOVE;
-
-        public static Operation ofBoolean(boolean result) {
-            return result ? KEEP : REMOVE;
-        }
-    }
-}

src/main/java/com/minelittlepony/unicopia/ability/magic/SpellInventory.java

@@ -0,0 +1,75 @@
+package com.minelittlepony.unicopia.ability.magic;
+
+import java.util.function.Function;
+
+import com.minelittlepony.unicopia.Unicopia;
+import com.minelittlepony.unicopia.ability.magic.spell.Situation;
+import com.minelittlepony.unicopia.ability.magic.spell.Spell;
+
+public class SpellInventory {
+
+    private final Caster<?> owner;
+    private final SpellSlots slots;
+
+    public SpellInventory(Caster<?> owner, SpellSlots slots) {
+        this.owner = owner;
+        this.slots = slots;
+    }
+
+    public SpellSlots getSlots() {
+        return slots;
+    }
+
+    public boolean tick(Situation situation) {
+        return tick(spell -> {
+            if (spell.isDying()) {
+                spell.tickDying(owner);
+                return Operation.ofBoolean(!spell.isDead());
+            }
+            return Operation.ofBoolean(spell.tick(owner, situation));
+        });
+    }
+
+    public boolean tick(Function<Spell, Operation> tickAction) {
+        try {
+            return forEach(spell -> {
+                try {
+                    return tickAction.apply(spell);
+                } catch (Throwable t) {
+                    Unicopia.LOGGER.error("Error whilst ticking spell on entity {}", owner, t);
+                }
+                return Operation.REMOVE;
+            });
+        } catch (Exception e) {
+            Unicopia.LOGGER.error("Error whilst ticking spell on entity {}", owner.asEntity(), e);
+        }
+        return false;
+    }
+
+    /**
+     * Iterates active spells and optionally removes matching ones.
+     *
+     * @return True if any matching spells remain active
+     */
+    public boolean forEach(Function<Spell, Operation> test) {
+        return slots.reduce((initial, spell) -> {
+            Operation op = test.apply(spell);
+            if (op == Operation.REMOVE) {
+                slots.remove(spell.getUuid(), true);
+            } else {
+                initial |= op != Operation.SKIP;
+            }
+            return initial;
+        });
+    }
+
+    public enum Operation {
+        SKIP,
+        KEEP,
+        REMOVE;
+
+        public static Operation ofBoolean(boolean result) {
+            return result ? KEEP : REMOVE;
+        }
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/SpellPredicate.java

@@ -7,19 +7,17 @@ import com.minelittlepony.unicopia.Affinity;
 import com.minelittlepony.unicopia.ability.magic.spell.*;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.MimicSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.ShieldSpell;
-
 import net.minecraft.entity.Entity;
 
 public interface SpellPredicate<T extends Spell> extends Predicate<Spell> {
+    SpellPredicate<?> ALL = spell -> true;
     SpellPredicate<IllusionarySpell> CAN_SUPPRESS = s -> s instanceof IllusionarySpell;
-    SpellPredicate<PlaceableSpell> IS_PLACED = s -> s instanceof PlaceableSpell;
     SpellPredicate<AbstractDisguiseSpell> IS_DISGUISE = s -> s instanceof AbstractDisguiseSpell;
     SpellPredicate<MimicSpell> IS_MIMIC = s -> s instanceof MimicSpell;
     SpellPredicate<ShieldSpell> IS_SHIELD_LIKE = spell -> spell instanceof ShieldSpell;
     SpellPredicate<TimedSpell> IS_TIMED = spell -> spell instanceof TimedSpell;
     SpellPredicate<OrientedSpell> IS_ORIENTED = spell -> spell instanceof OrientedSpell;
 
-    SpellPredicate<?> IS_NOT_PLACED = IS_PLACED.negate();
     SpellPredicate<?> IS_VISIBLE = spell -> spell != null && !spell.isHidden();
 
     SpellPredicate<?> IS_CORRUPTING = spell -> spell.getAffinity() == Affinity.BAD;

src/main/java/com/minelittlepony/unicopia/ability/magic/SpellSlots.java

@@ -0,0 +1,124 @@
+package com.minelittlepony.unicopia.ability.magic;
+
+import java.util.Optional;
+import java.util.UUID;
+import java.util.function.BiFunction;
+import java.util.stream.Stream;
+import org.jetbrains.annotations.Nullable;
+
+import com.minelittlepony.unicopia.ability.magic.spell.Spell;
+import com.minelittlepony.unicopia.util.Copyable;
+import com.minelittlepony.unicopia.util.NbtSerialisable;
+
+public interface SpellSlots extends NbtSerialisable, Copyable<SpellSlots> {
+    static SpellInventory ofUnbounded(Caster<?> caster) {
+        return new SpellInventory(caster, new MultiSpellSlot(caster));
+    }
+
+    static SpellInventory ofSingle(Caster<?> caster) {
+        return new SpellInventory(caster, new SingleSpellSlot(caster));
+    }
+
+    /**
+     * Gets all active effects for this caster that match the given type.
+     */
+    <T extends Spell> Stream<T> stream(@Nullable SpellPredicate<T> type);
+
+    /**
+     * Sets the active effect.
+     */
+    void put(@Nullable Spell effect);
+
+    /**
+     * Removes all effects currently active in this slot.
+     */
+    boolean clear(boolean force);
+
+    /**
+     * Cleanly removes a spell from this spell container.
+     *
+     * @param spellid ID of the spell to remove.
+     */
+    void remove(UUID spellid, boolean force);
+
+    /**
+     * Checks if a spell with the given uuid is present.
+     */
+    boolean contains(UUID id);
+
+    /**
+     * Gets the active effect for this caster
+     */
+    default <T extends Spell> Optional<T> get() {
+        return get(null);
+    }
+
+    /**
+     * Checks if any matching spells are active.
+     */
+    default boolean contains(@Nullable SpellPredicate<?> type) {
+        return get(type).isPresent();
+    }
+
+    /**
+     * Gets the active effect for this caster updating it if needed.
+     */
+    default <T extends Spell> Optional<T> get(@Nullable SpellPredicate<T> type) {
+        return stream(type).findFirst();
+    }
+
+    /**
+     * Removes all effects currently active in this slot.
+     */
+    default boolean clear() {
+        return clear(false);
+    }
+
+    /**
+     * Cleanly removes a spell from this spell container.
+     *
+     * @param spellid ID of the spell to remove.
+     */
+    default void remove(UUID spellid) {
+        remove(spellid, false);
+    }
+
+    /**
+     * Removes all active effects that match or contain a matching effect.
+     *
+     * @return True if the collection was changed
+     */
+    default boolean removeIf(SpellPredicate<?> test) {
+        return removeWhere(spell -> spell.findMatches(test).findFirst().isPresent());
+    }
+
+    /**
+     * Removes all matching top level active effects.
+     *
+     * @return True if the collection was changed
+     */
+    default boolean removeWhere(SpellPredicate<?> test) {
+        return reduce((initial, spell) -> {
+            if (test.test(spell)) {
+                remove(spell.getUuid());
+                return true;
+            }
+            return initial;
+        });
+    }
+
+    /**
+     * Gets all active effects for this caster updating it if needed.
+     */
+    default Stream<Spell> stream() {
+        return stream(null);
+    }
+
+    default boolean reduce(BiFunction<Boolean, Spell, Boolean> alteration) {
+        return stream().reduce(false, alteration, (a, b) -> b);
+    }
+
+    public interface UpdateCallback {
+        void onSpellAdded(Spell spell);
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/AbstractAreaEffectSpell.java

@@ -1,9 +1,17 @@
 package com.minelittlepony.unicopia.ability.magic.spell;
 
 import com.minelittlepony.unicopia.ability.magic.Caster;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.*;
+import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 
 public abstract class AbstractAreaEffectSpell extends AbstractSpell {
+    protected static final SpellAttribute<Float> RANGE = SpellAttribute.create(SpellAttributeType.RANGE, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.POWER, power -> Math.max(0, 4 + power));
+    public static final TooltipFactory TOOLTIP = RANGE;
+
     protected AbstractAreaEffectSpell(CustomisedSpellType<?> type) {
         super(type);
     }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/AbstractDelegatingSpell.java

@@ -1,64 +1,60 @@
 package com.minelittlepony.unicopia.ability.magic.spell;
 
 import java.util.*;
-import java.util.function.Function;
-import java.util.function.Predicate;
 import java.util.stream.Stream;
 
-import com.minelittlepony.unicopia.Affinity;
+import com.google.common.base.MoreObjects;
 import com.minelittlepony.unicopia.ability.magic.Caster;
+import com.minelittlepony.unicopia.ability.magic.SpellPredicate;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellType;
-import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
-import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
-import com.minelittlepony.unicopia.projectile.MagicProjectileEntity;
-import com.minelittlepony.unicopia.projectile.ProjectileDelegate;
+import com.minelittlepony.unicopia.network.track.DataTracker;
+import com.minelittlepony.unicopia.server.world.Ether;
 
 import net.minecraft.nbt.NbtCompound;
-import net.minecraft.util.hit.BlockHitResult;
-import net.minecraft.util.hit.EntityHitResult;
-
-public abstract class AbstractDelegatingSpell implements Spell,
-    ProjectileDelegate.ConfigurationListener, ProjectileDelegate.BlockHitListener, ProjectileDelegate.EntityHitListener {
-
-    private boolean dirty;
-    private boolean hidden;
-    private boolean destroyed;
 
+public abstract class AbstractDelegatingSpell implements Spell {
     private UUID uuid = UUID.randomUUID();
 
-    private final SpellType<?> type;
+    private final CustomisedSpellType<?> type;
+    protected final SpellReference<Spell> delegate = new SpellReference<>();
 
     public AbstractDelegatingSpell(CustomisedSpellType<?> type) {
-        this.type = type.type();
+        this.type = type;
     }
 
-    public abstract Collection<Spell> getDelegates();
+    public AbstractDelegatingSpell(CustomisedSpellType<?> type, Spell delegate) {
+        this.type = type;
+        this.delegate.set(delegate);
+    }
+
+    public final Spell getDelegate() {
+        return delegate.get();
+    }
+
+    @Override
+    public final DataTracker getDataTracker() {
+        return getOrEmpty().getDataTracker();
+    }
+
+    private Spell getOrEmpty() {
+        return MoreObjects.firstNonNull(delegate.get(), EmptySpell.INSTANCE);
+    }
 
     @Override
     public boolean equalsOrContains(UUID id) {
-        return Spell.super.equalsOrContains(id) || getDelegates().stream().anyMatch(s -> s.equalsOrContains(id));
+        return Spell.super.equalsOrContains(id) || delegate.equalsOrContains(id);
     }
 
     @Override
-    public Stream<Spell> findMatches(Predicate<Spell> predicate) {
-        return Stream.concat(Spell.super.findMatches(predicate), getDelegates().stream().flatMap(s -> s.findMatches(predicate)));
+    public <T extends Spell> Stream<T> findMatches(SpellPredicate<T> predicate) {
+        return Stream.concat(Spell.super.findMatches(predicate), delegate.findMatches(predicate));
     }
 
     @Override
-    public Affinity getAffinity() {
-        return Affinity.NEUTRAL;
-    }
-
-    @Override
-    public SpellType<?> getType() {
+    public CustomisedSpellType<?> getTypeAndTraits() {
         return type;
     }
 
-    @Override
-    public SpellTraits getTraits() {
-        return getDelegates().stream().map(Spell::getTraits).reduce(SpellTraits.EMPTY, SpellTraits::union);
-    }
-
     @Override
     public final UUID getUuid() {
         return uuid;
@@ -66,109 +62,80 @@ public abstract class AbstractDelegatingSpell implements Spell,
 
     @Override
     public void setDead() {
-        getDelegates().forEach(Spell::setDead);
+        getOrEmpty().setDead();
     }
 
     @Override
     public void tickDying(Caster<?> caster) {
+        getOrEmpty().tickDying(caster);
     }
 
     @Override
     public boolean isDead() {
-        return getDelegates().isEmpty() || getDelegates().stream().allMatch(Spell::isDead);
+        return getOrEmpty().isDead();
     }
 
     @Override
     public boolean isDying() {
-        return false;
+        return getOrEmpty().isDying();
     }
 
+    @Deprecated
     @Override
     public boolean isDirty() {
-        return dirty || getDelegates().stream().anyMatch(Spell::isDirty);
+        return delegate.hasDirtySpell();
     }
 
+    @Deprecated
     @Override
     public void setDirty() {
-        dirty = true;
+        getOrEmpty().setDirty();
     }
 
     @Override
     public boolean isHidden() {
-        return hidden || getDelegates().stream().allMatch(Spell::isHidden);
+        return getOrEmpty().isHidden();
     }
 
     @Override
     public void setHidden(boolean hidden) {
-        this.hidden = hidden;
+        getOrEmpty().setHidden(hidden);
     }
 
     @Override
     public final void destroy(Caster<?> caster) {
-        if (destroyed) {
-            return;
+        if (!caster.isClient()) {
+            Ether.get(caster.asWorld()).remove(this, caster);
         }
-        destroyed = true;
-        setDead();
-        onDestroyed(caster);
-    }
-
-    protected void onDestroyed(Caster<?> caster) {
-        getDelegates().forEach(a -> a.destroy(caster));
+        getOrEmpty().destroy(caster);
     }
 
     @Override
     public boolean tick(Caster<?> source, Situation situation) {
-        return execute(getDelegates().stream(), a -> {
-            if (a.isDying()) {
-                a.tickDying(source);
-                return !a.isDead();
-            }
-            return a.tick(source, situation);
-        });
-    }
-
-    @Override
-    public void onImpact(MagicProjectileEntity projectile, BlockHitResult hit) {
-        getDelegates(BlockHitListener.PREDICATE).forEach(a -> a.onImpact(projectile, hit));
-    }
-
-    @Override
-    public void onImpact(MagicProjectileEntity projectile, EntityHitResult hit) {
-        getDelegates(EntityHitListener.PREDICATE).forEach(a -> a.onImpact(projectile, hit));
-    }
-
-    @Override
-    public void configureProjectile(MagicProjectileEntity projectile, Caster<?> caster) {
-        getDelegates(ConfigurationListener.PREDICATE).forEach(a -> a.configureProjectile(projectile, caster));
+        Spell s = getOrEmpty();
+        if (s.isDying()) {
+            s.tickDying(source);
+            return !s.isDead();
+        }
+        return s.tick(source, situation);
     }
 
     @Override
     public void toNBT(NbtCompound compound) {
         compound.putUuid("uuid", uuid);
-        compound.putBoolean("hidden", hidden);
-        saveDelegates(compound);
+        compound.put("spell", delegate.toNBT());
     }
 
     @Override
     public void fromNBT(NbtCompound compound) {
-        dirty = false;
-        hidden = compound.getBoolean("hidden");
         if (compound.contains("uuid")) {
             uuid = compound.getUuid("uuid");
         }
-        loadDelegates(compound);
+        delegate.fromNBT(compound.getCompound("spell"));
     }
 
-    protected abstract void loadDelegates(NbtCompound compound);
-
-    protected abstract void saveDelegates(NbtCompound compound);
-
-    protected <T> Stream<T> getDelegates(Function<? super Spell, T> cast) {
-        return getDelegates().stream().map(cast).filter(Objects::nonNull);
-    }
-
-    protected static boolean execute(Stream<Spell> spells, Function<Spell, Boolean> action) {
-        return spells.reduce(false, (u, a) -> action.apply(a), (a, b) -> a || b);
+    @Override
+    public final String toString() {
+        return "Delegate{" + getTypeAndTraits() + "}[uuid=" + uuid + "][spell=" + delegate.get() + "]";
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/AbstractDisguiseSpell.java

@@ -28,10 +28,11 @@ public abstract class AbstractDisguiseSpell extends AbstractSpell implements Dis
 
     @Override
     protected void onDestroyed(Caster<?> caster) {
+        super.onDestroyed(caster);
         caster.asEntity().calculateDimensions();
         caster.asEntity().setInvisible(false);
-        if (caster instanceof Pony) {
-            ((Pony) caster).setInvisible(false);
+        if (caster instanceof Pony pony) {
+            pony.setInvisible(false);
         }
         disguise.remove();
     }
@@ -71,7 +72,7 @@ public abstract class AbstractDisguiseSpell extends AbstractSpell implements Dis
     public static Entity getAppearance(Entity e) {
         return e instanceof PlayerEntity ? Pony.of((PlayerEntity)e)
                 .getSpellSlot()
-                .get(SpellPredicate.IS_DISGUISE, true)
+                .get(SpellPredicate.IS_DISGUISE)
                 .map(AbstractDisguiseSpell::getDisguise)
                 .map(EntityAppearance::getAppearance)
                 .orElse(e) : e;

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/DispersableDisguiseSpell.java

@@ -9,6 +9,8 @@ import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellTyp
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.behaviour.EntityAppearance;
 import com.minelittlepony.unicopia.entity.player.Pony;
+import com.minelittlepony.unicopia.network.track.DataTracker;
+import com.minelittlepony.unicopia.network.track.TrackableDataType;
 import com.minelittlepony.unicopia.particle.MagicParticleEffect;
 import com.minelittlepony.unicopia.particle.UParticles;
 import net.minecraft.entity.Entity;
@@ -21,6 +23,7 @@ import net.minecraft.nbt.NbtCompound;
  */
 public class DispersableDisguiseSpell extends AbstractDisguiseSpell implements IllusionarySpell {
 
+    private final DataTracker.Entry<Boolean> suppressed = dataTracker.startTracking(TrackableDataType.BOOLEAN, false);
     private int suppressionCounter;
 
     public DispersableDisguiseSpell(CustomisedSpellType<?> type) {
@@ -36,8 +39,8 @@ public class DispersableDisguiseSpell extends AbstractDisguiseSpell implements I
     @Override
     public void onSuppressed(Caster<?> otherSource, float time) {
         time /= getTraits().getOrDefault(Trait.STRENGTH, 1);
-        suppressionCounter = (int)(100 * time);
-        setDirty();
+        suppressionCounter = (int)time;
+        suppressed.set(true);
     }
 
     @Override
@@ -64,7 +67,9 @@ public class DispersableDisguiseSpell extends AbstractDisguiseSpell implements I
         Entity appearance = getDisguise().getAppearance();
 
         if (isSuppressed()) {
-            suppressionCounter--;
+            if (--suppressionCounter <= 0) {
+                suppressed.set(false);
+            }
 
             owner.setInvisible(false);
             if (source instanceof Pony) {
@@ -92,6 +97,9 @@ public class DispersableDisguiseSpell extends AbstractDisguiseSpell implements I
     public void fromNBT(NbtCompound compound) {
         super.fromNBT(compound);
         suppressionCounter = compound.getInt("suppressionCounter");
+        if (suppressionCounter > 0) {
+            suppressed.set(true);
+        }
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/EmptySpell.java

@@ -0,0 +1,83 @@
+package com.minelittlepony.unicopia.ability.magic.spell;
+
+import java.util.UUID;
+
+import com.minelittlepony.unicopia.ability.magic.Caster;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellType;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
+import com.minelittlepony.unicopia.network.track.DataTracker;
+
+import net.minecraft.nbt.NbtCompound;
+import net.minecraft.util.Util;
+
+public final class EmptySpell implements Spell {
+    public static final EmptySpell INSTANCE = new EmptySpell();
+
+    private EmptySpell() {}
+
+    @Override
+    public void toNBT(NbtCompound compound) { }
+
+    @Override
+    public void fromNBT(NbtCompound compound) { }
+
+    @Override
+    public CustomisedSpellType<?> getTypeAndTraits() {
+        return SpellType.EMPTY_KEY.withTraits();
+    }
+
+    @Override
+    public UUID getUuid() {
+        return Util.NIL_UUID;
+    }
+
+    @Override
+    public void setDead() { }
+
+    @Override
+    public boolean isDead() {
+        return true;
+    }
+
+    @Override
+    public boolean isDying() {
+        return false;
+    }
+
+    @Override
+    public boolean isDirty() {
+        return false;
+    }
+
+    @Override
+    public boolean tick(Caster<?> caster, Situation situation) {
+        return false;
+    }
+
+    @Override
+    public void tickDying(Caster<?> caster) { }
+
+    @Override
+    public void setDirty() { }
+
+    @Override
+    public boolean isHidden() {
+        return true;
+    }
+
+    @Override
+    public void setHidden(boolean hidden) { }
+
+    @Override
+    public void destroy(Caster<?> caster) { }
+
+    @Override
+    public String toString() {
+        return "EmptySpell{}";
+    }
+
+    @Override
+    public DataTracker getDataTracker() {
+        return null;
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/OrientedSpell.java

@@ -1,11 +1,12 @@
 package com.minelittlepony.unicopia.ability.magic.spell;
 
 import com.minelittlepony.unicopia.ability.data.Rot;
+import com.minelittlepony.unicopia.ability.magic.Caster;
 
 public interface OrientedSpell extends Spell {
-    void setOrientation(float pitch, float yaw);
+    void setOrientation(Caster<?> caster, float pitch, float yaw);
 
-    default void setOrientation(Rot rotation) {
-        setOrientation(rotation.pitch(), rotation.yaw());
+    default void setOrientation(Caster<?> caster, Rot rotation) {
+        setOrientation(caster, rotation.pitch(), rotation.yaw());
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/PlaceableSpell.java

@@ -1,292 +0,0 @@
-package com.minelittlepony.unicopia.ability.magic.spell;
-
-import java.util.*;
-
-import org.jetbrains.annotations.Nullable;
-
-import com.minelittlepony.unicopia.ability.magic.Caster;
-import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellType;
-import com.minelittlepony.unicopia.entity.EntityReference;
-import com.minelittlepony.unicopia.entity.EntityReference.EntityValues;
-import com.minelittlepony.unicopia.entity.mob.CastSpellEntity;
-import com.minelittlepony.unicopia.entity.mob.UEntities;
-import com.minelittlepony.unicopia.entity.player.Pony;
-import com.minelittlepony.unicopia.network.Channel;
-import com.minelittlepony.unicopia.network.MsgCasterLookRequest;
-import com.minelittlepony.unicopia.server.world.Ether;
-import com.minelittlepony.unicopia.util.NbtSerialisable;
-
-import net.minecraft.nbt.*;
-import net.minecraft.registry.*;
-import net.minecraft.server.network.ServerPlayerEntity;
-import net.minecraft.util.Identifier;
-import net.minecraft.util.math.MathHelper;
-import net.minecraft.util.math.Vec3d;
-import net.minecraft.world.World;
-
-/**
- * A spell that can be attached to a specific location in the world.
- * <p>
- * The spell's effects are still powered by the casting player, so if the player dies or leaves the area, their
- * spell loses affect until they return.
- */
-public class PlaceableSpell extends AbstractDelegatingSpell implements OrientedSpell {
-    /**
-     * Dimension the spell was originally cast in
-     */
-    @Nullable
-    private RegistryKey<World> dimension;
-
-    /**
-     * ID of the placed counterpart of this spell.
-     */
-    @Nullable
-    private UUID placedSpellId;
-
-    /**
-     * The cast spell entity
-     */
-    private final EntityReference<CastSpellEntity> castEntity = new EntityReference<>();
-
-    /**
-     * The spell being cast
-     */
-    private final SpellReference<Spell> spell = new SpellReference<>();
-
-    public float pitch;
-    public float yaw;
-
-    private int prevAge;
-    private int age;
-
-    private boolean dead;
-    private int prevDeathTicks;
-    private int deathTicks;
-
-    private Optional<Vec3d> position = Optional.empty();
-
-    public PlaceableSpell(CustomisedSpellType<?> type) {
-        super(type);
-    }
-
-    public PlaceableSpell setSpell(Spell spell) {
-        this.spell.set(spell);
-        return this;
-    }
-
-    public float getAge(float tickDelta) {
-        return MathHelper.lerp(tickDelta, prevAge, age);
-    }
-
-    public float getScale(float tickDelta) {
-        float add = MathHelper.clamp(getAge(tickDelta) / 25F, 0, 1);
-        float subtract = dead ? 1 - (MathHelper.lerp(tickDelta, prevDeathTicks, deathTicks) / 20F) : 0;
-        return MathHelper.clamp(add - subtract, 0, 1);
-    }
-
-    @Override
-    public boolean isDying() {
-        return dead && deathTicks > 0;
-    }
-
-    @Override
-    public void setDead() {
-        super.setDead();
-        dead = true;
-        deathTicks = 20;
-    }
-
-    @Override
-    public boolean isDead() {
-        return dead && deathTicks <= 0 && super.isDead();
-    }
-
-    @Override
-    public Collection<Spell> getDelegates() {
-        Spell spell = this.spell.get();
-        return spell == null ? List.of() : List.of(spell);
-    }
-
-    @Override
-    public boolean tick(Caster<?> source, Situation situation) {
-        if (situation == Situation.BODY) {
-            if (!source.isClient()) {
-                if (dimension == null) {
-                    dimension = source.asWorld().getRegistryKey();
-                    if (source instanceof Pony) {
-                        Channel.SERVER_REQUEST_PLAYER_LOOK.sendToPlayer(new MsgCasterLookRequest(getUuid()), (ServerPlayerEntity)source.asEntity());
-                    }
-                    setDirty();
-                }
-
-                castEntity.getTarget().ifPresentOrElse(
-                        target -> checkDetachment(source, target),
-                        () -> spawnPlacedEntity(source)
-                );
-            }
-
-            return !isDead();
-        }
-
-        if (situation == Situation.GROUND_ENTITY) {
-            if (!source.isClient()) {
-                if (Ether.get(source.asWorld()).get(this, source) == null) {
-                    setDead();
-                    return false;
-                }
-            }
-
-            prevAge = age;
-            if (age < 25) {
-                age++;
-            }
-
-            return super.tick(source, Situation.GROUND);
-        }
-
-        return !isDead();
-    }
-
-    @Override
-    public void tickDying(Caster<?> caster) {
-        prevDeathTicks = deathTicks;
-        deathTicks--;
-    }
-
-    private void checkDetachment(Caster<?> source, EntityValues<?> target) {
-        if (getWorld(source).map(Ether::get).map(ether -> ether.get(getType(), target, placedSpellId)).isEmpty()) {
-            setDead();
-        }
-    }
-
-    private void spawnPlacedEntity(Caster<?> source) {
-        CastSpellEntity entity = UEntities.CAST_SPELL.create(source.asWorld());
-        Vec3d pos = getPosition().orElse(position.orElse(source.asEntity().getPos()));
-        entity.updatePositionAndAngles(pos.x, pos.y, pos.z, source.asEntity().getYaw(), source.asEntity().getPitch());
-        PlaceableSpell copy = spell.get().toPlaceable();
-        if (spell.get() instanceof PlacementDelegate delegate) {
-            delegate.onPlaced(source, copy, entity);
-        }
-        entity.getSpellSlot().put(copy);
-        entity.setCaster(source);
-        entity.getWorld().spawnEntity(entity);
-        placedSpellId = copy.getUuid();
-        Ether.get(entity.getWorld()).getOrCreate(copy, entity);
-
-        castEntity.set(entity);
-        setDirty();
-    }
-
-    @Override
-    public void setOrientation(float pitch, float yaw) {
-        this.pitch = -90 - pitch;
-        this.yaw = -yaw;
-        getDelegates(spell -> spell instanceof OrientedSpell o ? o : null)
-            .forEach(spell -> spell.setOrientation(pitch, yaw));
-        setDirty();
-    }
-
-    public void setPosition(Caster<?> source, Vec3d position) {
-        this.position = Optional.of(position);
-        this.dimension = source.asWorld().getRegistryKey();
-        castEntity.ifPresent(source.asWorld(), entity -> {
-            entity.updatePositionAndAngles(position.x, position.y, position.z, entity.getYaw(), entity.getPitch());
-        });
-        getDelegates(spell -> spell instanceof PlaceableSpell o ? o : null)
-            .forEach(spell -> spell.setPosition(source, position));
-        setDirty();
-    }
-
-    @Override
-    protected void onDestroyed(Caster<?> source) {
-        if (!source.isClient()) {
-            castEntity.getTarget().ifPresent(target -> {
-                getWorld(source).map(Ether::get)
-                    .ifPresent(ether -> ether.remove(getType(), target.uuid()));
-            });
-            castEntity.set(null);
-            getSpellEntity(source).ifPresent(e -> {
-                castEntity.set(null);
-            });
-
-            if (source.asEntity() instanceof CastSpellEntity) {
-                Ether.get(source.asWorld()).remove(this, source);
-            }
-        }
-        super.onDestroyed(source);
-    }
-
-    public Optional<CastSpellEntity> getSpellEntity(Caster<?> source) {
-        return getWorld(source).map(castEntity::get);
-    }
-
-    public Optional<Vec3d> getPosition() {
-        return castEntity.getTarget().map(EntityValues::pos);
-    }
-
-    protected Optional<World> getWorld(Caster<?> source) {
-        return Optional.ofNullable(dimension)
-                .map(dim -> source.asWorld().getServer().getWorld(dim));
-    }
-
-    @Override
-    public void toNBT(NbtCompound compound) {
-        super.toNBT(compound);
-        compound.putBoolean("dead", dead);
-        compound.putInt("deathTicks", deathTicks);
-        compound.putInt("age", age);
-        compound.putFloat("pitch", pitch);
-        compound.putFloat("yaw", yaw);
-        position.ifPresent(pos -> {
-            compound.put("position", NbtSerialisable.writeVector(pos));
-        });
-        if (placedSpellId != null) {
-            compound.putUuid("placedSpellId", placedSpellId);
-        }
-        if (dimension != null) {
-            compound.putString("dimension", dimension.getValue().toString());
-        }
-        compound.put("castEntity", castEntity.toNBT());
-
-    }
-
-    @Override
-    public void fromNBT(NbtCompound compound) {
-        super.fromNBT(compound);
-        dead = compound.getBoolean("dead");
-        deathTicks = compound.getInt("deathTicks");
-        age = compound.getInt("age");
-        pitch = compound.getFloat("pitch");
-        yaw = compound.getFloat("yaw");
-        position = compound.contains("position") ? Optional.of(NbtSerialisable.readVector(compound.getList("position", NbtElement.FLOAT_TYPE))) : Optional.empty();
-        placedSpellId = compound.containsUuid("placedSpellId") ? compound.getUuid("placedSpellId") : null;
-        if (compound.contains("dimension", NbtElement.STRING_TYPE)) {
-            Identifier id = Identifier.tryParse(compound.getString("dimension"));
-            if (id != null) {
-                dimension = RegistryKey.of(RegistryKeys.WORLD, id);
-            }
-        }
-        if (compound.contains("castEntity")) {
-            castEntity.fromNBT(compound.getCompound("castEntity"));
-        }
-    }
-
-    @Override
-    protected void loadDelegates(NbtCompound compound) {
-        spell.fromNBT(compound.getCompound("spell"));
-    }
-
-    @Override
-    protected void saveDelegates(NbtCompound compound) {
-        compound.put("spell", spell.toNBT());
-    }
-
-    @Override
-    public PlaceableSpell toPlaceable() {
-        return this;
-    }
-
-    public interface PlacementDelegate {
-        void onPlaced(Caster<?> source, PlaceableSpell parent, CastSpellEntity entity);
-    }
-}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/PlacementControlSpell.java

@@ -0,0 +1,154 @@
+package com.minelittlepony.unicopia.ability.magic.spell;
+
+import java.util.Optional;
+import java.util.UUID;
+
+import org.jetbrains.annotations.Nullable;
+import com.minelittlepony.unicopia.ability.magic.Caster;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.AbstractSpell;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellType;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
+import com.minelittlepony.unicopia.entity.mob.CastSpellEntity;
+import com.minelittlepony.unicopia.server.world.Ether;
+import com.minelittlepony.unicopia.util.NbtSerialisable;
+
+import net.minecraft.nbt.NbtCompound;
+import net.minecraft.nbt.NbtElement;
+import net.minecraft.registry.RegistryKey;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.math.Vec3d;
+import net.minecraft.world.World;
+
+public class PlacementControlSpell extends AbstractSpell implements OrientedSpell {
+    @Nullable
+    private UUID placedEntityId;
+
+    private Optional<RegistryKey<World>> dimension = Optional.empty();
+    private Optional<Vec3d> position = Optional.empty();
+    private Optional<Vec3d> orientation = Optional.empty();
+
+    @Nullable
+    private Spell delegate;
+
+    public PlacementControlSpell(CustomisedSpellType<?> type) {
+        super(type);
+    }
+
+    PlacementControlSpell(Spell delegate) {
+        this(SpellType.PLACE_CONTROL_SPELL.withTraits(delegate.getTypeAndTraits().traits()));
+        this.delegate = delegate;
+    }
+
+    @Nullable
+    public Spell getDelegate() {
+        return delegate;
+    }
+
+    public Optional<Vec3d> getPosition() {
+        return position;
+    }
+
+    public void setDimension(RegistryKey<World> dimension) {
+        this.dimension = Optional.of(dimension);
+        setDirty();
+    }
+
+    public void setPosition(Vec3d position) {
+        this.position = Optional.of(position);
+        setDirty();
+    }
+
+    @Override
+    public void setOrientation(Caster<?> caster, float pitch, float yaw) {
+        this.orientation = Optional.of(new Vec3d(pitch, yaw, 0));
+        if (delegate instanceof OrientedSpell o) {
+            o.setOrientation(caster, pitch, yaw);
+        }
+        setDirty();
+        if (!caster.isClient()) {
+            var entry = getConnection(caster);
+            if (entry != null) {
+                entry.setPitch(pitch);
+                entry.setYaw(yaw);
+            }
+        }
+    }
+
+    @Override
+    public boolean apply(Caster<?> caster) {
+        if (delegate == null) {
+            return false;
+        }
+        boolean result = super.apply(caster);
+        if (result) {
+            if (dimension.isEmpty()) {
+                setDimension(caster.asWorld().getRegistryKey());
+            }
+            if (position.isEmpty()) {
+                setPosition(caster.asEntity().getPos());
+            }
+            if (delegate instanceof PlacementDelegate) {
+                ((PlacementDelegate)delegate).onPlaced(caster, this);
+            }
+
+            CastSpellEntity entity = new CastSpellEntity(caster.asWorld(), caster, this);
+
+            Vec3d pos = position.get();
+            Vec3d rot = orientation.orElse(Vec3d.ZERO);
+
+            entity.updatePositionAndAngles(pos.x, pos.y, pos.z, (float)rot.y, (float)rot.x);
+            entity.getWorld().spawnEntity(entity);
+
+            placedEntityId = entity.getUuid();
+        }
+        return result;
+    }
+
+    @Override
+    public boolean tick(Caster<?> source, Situation situation) {
+        if (!source.isClient() && getConnection(source) == null) {
+            setDead();
+        }
+        return !isDead();
+    }
+
+    @Nullable
+    private Ether.Entry<?> getConnection(Caster<?> source) {
+        return delegate == null || placedEntityId == null ? null : getWorld(source)
+                .map(world -> Ether.get(world).get(getDelegate().getTypeAndTraits().type(), placedEntityId, delegate.getUuid()))
+                .orElse(null);
+    }
+
+    private Optional<World> getWorld(Caster<?> source) {
+        return dimension.map(source.asWorld().getServer()::getWorld);
+    }
+
+    @Override
+    public void toNBT(NbtCompound compound) {
+        super.toNBT(compound);
+        compound.put("spell", Spell.writeNbt(delegate));
+        position.ifPresent(pos -> compound.put("position", NbtSerialisable.writeVector(pos)));
+        orientation.ifPresent(o -> compound.put("orientation", NbtSerialisable.writeVector(o)));
+        dimension.ifPresent(d -> compound.putString("dimension", d.getValue().toString()));
+        if (placedEntityId != null) {
+            compound.putUuid("placedEntityId", placedEntityId);
+        }
+    }
+
+    @Override
+    public void fromNBT(NbtCompound compound) {
+        super.fromNBT(compound);
+        delegate = Spell.readNbt(compound.getCompound("spell"));
+        placedEntityId = compound.containsUuid("placedEntityId") ? compound.getUuid("placedEntityId") : null;
+        position = compound.contains("position") ? Optional.of(NbtSerialisable.readVector(compound.getList("position", NbtElement.DOUBLE_TYPE))) : Optional.empty();
+        orientation = compound.contains("orientation") ? Optional.of(NbtSerialisable.readVector(compound.getList("orientation", NbtElement.DOUBLE_TYPE))) : Optional.empty();
+        if (compound.contains("dimension", NbtElement.STRING_TYPE)) {
+            dimension = Optional.ofNullable(Identifier.tryParse(compound.getString("dimension"))).map(id -> RegistryKey.of(RegistryKeys.WORLD, id));
+        }
+    }
+
+    public interface PlacementDelegate {
+        void onPlaced(Caster<?> source, PlacementControlSpell parent);
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/RageAbilitySpell.java

@@ -54,7 +54,6 @@ public class RageAbilitySpell extends AbstractSpell {
             ticksExtenguishing++;
             source.playSound(USounds.Vanilla.ENTITY_GENERIC_EXTINGUISH_FIRE, 1);
             source.spawnParticles(ParticleTypes.CLOUD, 12);
-            setDirty();
         } else {
             ticksExtenguishing = 0;
         }
@@ -127,9 +126,6 @@ public class RageAbilitySpell extends AbstractSpell {
 
         age++;
         source.asEntity().setInvulnerable(age < 25);
-
-
-        setDirty();
         return true;
     }
 

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/Spell.java

@@ -1,17 +1,20 @@
 package com.minelittlepony.unicopia.ability.magic.spell;
 
 import java.util.UUID;
-import java.util.function.Predicate;
 import java.util.stream.Stream;
 
 import org.jetbrains.annotations.Nullable;
 import org.spongepowered.include.com.google.common.base.Objects;
 
+import com.minelittlepony.unicopia.Affinity;
 import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.ability.magic.Affine;
 import com.minelittlepony.unicopia.ability.magic.Caster;
+import com.minelittlepony.unicopia.ability.magic.SpellPredicate;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellType;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
-import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
+import com.minelittlepony.unicopia.network.track.DataTracker;
+import com.minelittlepony.unicopia.server.world.Ether;
 import com.minelittlepony.unicopia.util.NbtSerialisable;
 
 import net.minecraft.nbt.NbtCompound;
@@ -24,14 +27,20 @@ public interface Spell extends NbtSerialisable, Affine {
     Serializer<Spell> SERIALIZER = Serializer.of(Spell::readNbt, Spell::writeNbt);
 
     /**
-     * Returns the registered type of this spell.
+     * Returns the full type that describes this spell.
      */
-    SpellType<?> getType();
+    CustomisedSpellType<?> getTypeAndTraits();
 
-    /**
-     * Gets the traits of this spell.
-     */
-    SpellTraits getTraits();
+    DataTracker getDataTracker();
+
+    default boolean isOf(SpellType<?> type) {
+        return getTypeAndTraits().type() == type;
+    }
+
+    @Override
+    default Affinity getAffinity() {
+        return getTypeAndTraits().type().getAffinity();
+    }
 
     /**
      * The unique id of this particular spell instance.
@@ -48,8 +57,9 @@ public interface Spell extends NbtSerialisable, Affine {
     /**
      * Returns an optional containing the spell that matched the given predicate.
      */
-    default Stream<Spell> findMatches(Predicate<Spell> predicate) {
-        return predicate.test(this) ? Stream.of(this) : Stream.empty();
+    @SuppressWarnings("unchecked")
+    default <T extends Spell> Stream<T> findMatches(SpellPredicate<T> predicate) {
+        return predicate == null || predicate.test(this) ? Stream.of((T)this) : Stream.empty();
     }
 
     /**
@@ -67,14 +77,24 @@ public interface Spell extends NbtSerialisable, Affine {
     /**
      * Returns true if this effect has changes that need to be sent to the client.
      */
+    @Deprecated
     boolean isDirty();
 
+    /**
+     * Marks this effect as dirty.
+     */
+    @Deprecated
+    void setDirty();
+
     /**
      * Applies this spell to the supplied caster.
      * @param caster    The caster to apply the spell to
      */
     default boolean apply(Caster<?> caster) {
         caster.getSpellSlot().put(this);
+        if (!caster.isClient()) {
+            Ether.get(caster.asWorld()).getOrCreate(this, caster);
+        }
         return true;
     }
 
@@ -100,11 +120,6 @@ public interface Spell extends NbtSerialisable, Affine {
      */
     void tickDying(Caster<?> caster);
 
-    /**
-     * Marks this effect as dirty.
-     */
-    void setDirty();
-
     boolean isHidden();
 
     void setHidden(boolean hidden);
@@ -117,8 +132,8 @@ public interface Spell extends NbtSerialisable, Affine {
     /**
      * Converts this spell into a placeable spell.
      */
-    default PlaceableSpell toPlaceable() {
-        return SpellType.PLACED_SPELL.withTraits().create().setSpell(this);
+    default PlacementControlSpell toPlaceable() {
+        return new PlacementControlSpell(this);
     }
 
     /**
@@ -126,21 +141,14 @@ public interface Spell extends NbtSerialisable, Affine {
      * @return
      */
     default ThrowableSpell toThrowable() {
-        return SpellType.THROWN_SPELL.withTraits().create().setSpell(this);
+        return new ThrowableSpell(this);
     }
 
     @Nullable
     static <T extends Spell> T readNbt(@Nullable NbtCompound compound) {
         try {
-            if (compound != null && compound.contains("effect_id")) {
-                @SuppressWarnings("unchecked")
-                T effect = (T)SpellType.getKey(compound).withTraits().create();
-
-                if (effect != null) {
-                    effect.fromNBT(compound);
-                }
-
-                return effect;
+            if (compound != null) {
+                return CustomisedSpellType.<T>fromNBT(compound).create(compound);
             }
         } catch (Exception e) {
             Unicopia.LOGGER.fatal("Invalid spell nbt {}", e);
@@ -153,9 +161,16 @@ public interface Spell extends NbtSerialisable, Affine {
         return compound == null || !compound.containsUuid("uuid") ? Util.NIL_UUID :  compound.getUuid("uuid");
     }
 
-    static NbtCompound writeNbt(Spell effect) {
+    static NbtCompound writeNbt(@Nullable Spell effect) {
+        if (effect == null) {
+            return new NbtCompound();
+        }
         NbtCompound compound = effect.toNBT();
-        effect.getType().toNbt(compound);
+        effect.getTypeAndTraits().toNbt(compound);
         return compound;
     }
+
+    static <T extends Spell> Spell copy(T spell) {
+        return readNbt(writeNbt(spell));
+    }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/SpellReference.java

@@ -1,9 +1,13 @@
 package com.minelittlepony.unicopia.ability.magic.spell;
 
 import java.util.Objects;
+import java.util.UUID;
+import java.util.stream.Stream;
+
 import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.ability.magic.Caster;
+import com.minelittlepony.unicopia.ability.magic.SpellPredicate;
 import com.minelittlepony.unicopia.util.NbtSerialisable;
 
 import net.minecraft.nbt.NbtCompound;
@@ -11,7 +15,6 @@ import net.minecraft.nbt.NbtCompound;
 public final class SpellReference<T extends Spell> implements NbtSerialisable {
     @Nullable
     private transient T spell;
-    private int nbtHash;
 
     @Nullable
     public T get() {
@@ -22,6 +25,7 @@ public final class SpellReference<T extends Spell> implements NbtSerialisable {
         set(spell, null);
     }
 
+    @Deprecated
     public boolean hasDirtySpell() {
         return spell != null && spell.isDirty();
     }
@@ -33,36 +37,36 @@ public final class SpellReference<T extends Spell> implements NbtSerialisable {
         }
         T oldValue = this.spell;
         this.spell = spell;
-        nbtHash = 0;
         if (owner != null && oldValue != null && (spell == null || !oldValue.getUuid().equals(spell.getUuid()))) {
             oldValue.destroy(owner);
         }
         return true;
     }
 
+    public boolean equalsOrContains(UUID id) {
+        @Nullable T spell = get();
+        return spell != null && spell.equalsOrContains(id);
+    }
+
+    @SuppressWarnings("unchecked")
+    public <V extends Spell> Stream<V> findMatches(SpellPredicate<V> predicate) {
+        @Nullable T spell = get();
+        return spell != null ? (predicate == null ? Stream.of((V)spell) : spell.findMatches(predicate)) : Stream.empty();
+    }
+
     @Override
     public void toNBT(NbtCompound compound) {
         if (spell != null && !spell.isDead()) {
             spell.toNBT(compound);
-            spell.getType().toNbt(compound);
+            spell.getTypeAndTraits().toNbt(compound);
         }
     }
 
     @Override
     public void fromNBT(NbtCompound compound) {
-        fromNBT(compound, true);
-    }
-
-    public void fromNBT(NbtCompound compound, boolean force) {
-        final int hash = compound.hashCode();
-        if (nbtHash == hash) {
-            return;
-        }
-        nbtHash = hash;
-
         if (spell == null || !Objects.equals(Spell.getUuid(compound), spell.getUuid())) {
             spell = Spell.readNbt(compound);
-        } else if (force || !spell.isDirty()) {
+        } else  {
             spell.fromNBT(compound);
         }
     }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/ThrowableSpell.java

@@ -1,32 +1,28 @@
 package com.minelittlepony.unicopia.ability.magic.spell;
 
-import java.util.Collection;
-import java.util.List;
 import java.util.Optional;
 
 import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellType;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
 import com.minelittlepony.unicopia.projectile.MagicBeamEntity;
-import net.minecraft.nbt.NbtCompound;
+import com.minelittlepony.unicopia.projectile.MagicProjectileEntity;
+import com.minelittlepony.unicopia.projectile.ProjectileDelegate;
+
+import net.minecraft.util.hit.BlockHitResult;
+import net.minecraft.util.hit.EntityHitResult;
 import net.minecraft.world.World;
 
-public final class ThrowableSpell extends AbstractDelegatingSpell {
-
-    private final SpellReference<Spell> spell = new SpellReference<>();
+public final class ThrowableSpell extends AbstractDelegatingSpell implements
+    ProjectileDelegate.ConfigurationListener, ProjectileDelegate.BlockHitListener, ProjectileDelegate.EntityHitListener {
 
     public ThrowableSpell(CustomisedSpellType<?> type) {
         super(type);
     }
 
-    public ThrowableSpell setSpell(Spell spell) {
-        this.spell.set(spell);
-        return this;
-    }
-
-    @Override
-    public Collection<Spell> getDelegates() {
-        return List.of(spell.get());
+    public ThrowableSpell(Spell delegate) {
+        super(SpellType.THROWN_SPELL.withTraits(delegate.getTypeAndTraits().traits()), delegate);
     }
 
     @Override
@@ -57,7 +53,7 @@ public final class ThrowableSpell extends AbstractDelegatingSpell {
             return Optional.empty();
         }
 
-        return Optional.ofNullable(spell.get().prepareForCast(caster, CastingMethod.STORED)).map(s -> {
+        return Optional.ofNullable(delegate.get().prepareForCast(caster, CastingMethod.STORED)).map(s -> {
             MagicBeamEntity projectile = new MagicBeamEntity(world, caster.asEntity(), divergance, s);
 
             configureProjectile(projectile, caster);
@@ -67,16 +63,6 @@ public final class ThrowableSpell extends AbstractDelegatingSpell {
         });
     }
 
-    @Override
-    protected void loadDelegates(NbtCompound compound) {
-        spell.fromNBT(compound.getCompound("spell"));
-    }
-
-    @Override
-    protected void saveDelegates(NbtCompound compound) {
-        compound.put("spell", spell.toNBT());
-    }
-
     @Override
     public ThrowableSpell toThrowable() {
         return this;
@@ -90,4 +76,25 @@ public final class ThrowableSpell extends AbstractDelegatingSpell {
     @Override
     public void setHidden(boolean hidden) {
     }
+
+    @Override
+    public void onImpact(MagicProjectileEntity projectile, BlockHitResult hit) {
+        if (delegate.get() instanceof BlockHitListener listener) {
+            listener.onImpact(projectile, hit);
+        }
+    }
+
+    @Override
+    public void onImpact(MagicProjectileEntity projectile, EntityHitResult hit) {
+        if (delegate.get() instanceof EntityHitListener listener) {
+            listener.onImpact(projectile, hit);
+        }
+    }
+
+    @Override
+    public void configureProjectile(MagicProjectileEntity projectile, Caster<?> caster) {
+        if (delegate.get() instanceof ConfigurationListener listener) {
+            listener.configureProjectile(projectile, caster);
+        }
+    }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/TimedSpell.java

@@ -1,5 +1,9 @@
 package com.minelittlepony.unicopia.ability.magic.spell;
 
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.util.NbtSerialisable;
 import com.minelittlepony.unicopia.util.Tickable;
 
@@ -10,6 +14,9 @@ import net.minecraft.util.math.MathHelper;
  * A magic effect with a set duration capable of reporting how long it has until it runs out.
  */
 public interface TimedSpell extends Spell {
+    int BASE_DURATION = 120 * 20;
+    SpellAttribute<Integer> TIME = SpellAttribute.create(SpellAttributeType.SOAPINESS, AttributeFormat.TIME, AttributeFormat.PERCENTAGE, Trait.FOCUS, focus -> BASE_DURATION + (int)(MathHelper.clamp(focus, 0, 160) * 19) * 20);
+
     Timer getTimer();
 
     class Timer implements Tickable, NbtSerialisable {

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/attribute/Affects.java

@@ -0,0 +1,15 @@
+package com.minelittlepony.unicopia.ability.magic.spell.attribute;
+
+public enum Affects {
+    BOTH,
+    ENTITIES,
+    BLOCKS;
+
+    public boolean allowsBlocks() {
+        return this == BOTH || this == BLOCKS;
+    }
+
+    public boolean allowsEntities() {
+        return this == BOTH || this == ENTITIES;
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/attribute/AttributeFormat.java

@@ -0,0 +1,63 @@
+package com.minelittlepony.unicopia.ability.magic.spell.attribute;
+
+import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
+import com.minelittlepony.unicopia.client.UnicopiaClient;
+import com.minelittlepony.unicopia.client.gui.ItemTraitsTooltipRenderer;
+
+import net.minecraft.item.ItemStack;
+import net.minecraft.text.MutableText;
+import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
+import net.minecraft.util.StringHelper;
+
+public enum AttributeFormat {
+    REGULAR {
+        @Override
+        public String formatValue(float value) {
+            return ItemStack.MODIFIER_FORMAT.format(value);
+        }
+    },
+    TIME {
+        @Override
+        public String formatValue(float value) {
+            return StringHelper.formatTicks((int)Math.abs(value));
+        }
+    },
+    PERCENTAGE {
+        @Override
+        public String formatValue(float value) {
+            return ItemStack.MODIFIER_FORMAT.format((int)(Math.abs(value) * 100)) + "%";
+        }
+    };
+
+    public abstract String formatValue(float value);
+
+    public MutableText getBase(Text attributeName, float value, String comparison, Formatting color) {
+        return formatAttributeLine(Text.translatable("attribute.modifier." + comparison + ".0", formatValue(value), attributeName).formatted(color));
+    }
+
+    public Text get(Text attributeName, float value) {
+        return getBase(attributeName, value, "equals", Formatting.LIGHT_PURPLE);
+    }
+
+    public Text getRelative(Text attributeName, float baseValue, float currentValue, boolean detrimental) {
+        float difference = currentValue - baseValue;
+        return Text.literal(" (" + (difference > 0 ? "+" : "-") + formatValue(this == PERCENTAGE ? difference / baseValue : difference) + ")").formatted((detrimental ? difference : -difference) < 0 ? Formatting.DARK_GREEN : Formatting.RED);
+    }
+
+    static Text formatTraitDifference(Trait trait, float value) {
+        boolean known = ItemTraitsTooltipRenderer.isKnown(trait);
+        boolean canCast = UnicopiaClient.getClientPony() != null && UnicopiaClient.getClientPony().getObservedSpecies().canCast();
+        Text name = canCast ? known
+                ? trait.getName()
+                : Text.translatable("spell_attribute.unicopia.added_trait.unknown").formatted(Formatting.YELLOW)
+                : trait.getName().copy().formatted(Formatting.OBFUSCATED, Formatting.YELLOW);
+        Text count = Text.literal(ItemStack.MODIFIER_FORMAT.format(value));
+        return Text.translatable("spell_attribute.unicopia.added_trait." + ((value > 0) ? "plus" : "take"), name, count).formatted(Formatting.DARK_AQUA);
+    }
+
+    public static MutableText formatAttributeLine(Text attributeName) {
+        return Text.literal(" ").append(attributeName).formatted(Formatting.LIGHT_PURPLE);
+    }
+
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/attribute/CastOn.java

@@ -0,0 +1,6 @@
+package com.minelittlepony.unicopia.ability.magic.spell.attribute;
+
+public enum CastOn {
+    LOCATION,
+    SELF
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/attribute/Permits.java

@@ -0,0 +1,8 @@
+package com.minelittlepony.unicopia.ability.magic.spell.attribute;
+
+public enum Permits {
+    ITEMS,
+    PASSIVE,
+    HOSTILE,
+    PLAYER
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/attribute/SpellAttribute.java

@@ -0,0 +1,106 @@
+package com.minelittlepony.unicopia.ability.magic.spell.attribute;
+
+import java.util.List;
+import java.util.Locale;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+
+import org.jetbrains.annotations.NotNull;
+
+import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellType;
+import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
+import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
+
+import it.unimi.dsi.fastutil.floats.Float2ObjectFunction;
+import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
+import net.minecraft.util.Util;
+
+public record SpellAttribute<T> (
+        Trait trait,
+        BiFunction<SpellTraits, Float, T> valueGetter,
+        TooltipFactory tooltipFactory
+) implements TooltipFactory {
+    @Override
+    public void appendTooltip(CustomisedSpellType<?> type, List<Text> tooltip) {
+        tooltipFactory.appendTooltip(type, tooltip);
+    }
+
+    public T get(SpellTraits traits) {
+        return valueGetter.apply(traits, traits.get(trait));
+    }
+
+    public static <T extends Number> SpellAttribute<T> create(SpellAttributeType id, AttributeFormat format, Trait trait, BiFunction<SpellTraits, Float, @NotNull T> valueGetter) {
+        return create(id, format, format, trait, valueGetter, false);
+    }
+
+    public static <T extends Number> SpellAttribute<T> create(SpellAttributeType id, AttributeFormat format, Trait trait, Float2ObjectFunction<@NotNull T> valueGetter) {
+        return create(id, format, format, trait, valueGetter, false);
+    }
+
+    public static <T extends Number> SpellAttribute<T> create(SpellAttributeType id, AttributeFormat baseFormat, AttributeFormat relativeFormat, Trait trait, Float2ObjectFunction<@NotNull T> valueGetter) {
+        return create(id, baseFormat, relativeFormat, trait, valueGetter, false);
+    }
+
+    public static <T extends Number> SpellAttribute<T> create(SpellAttributeType id, AttributeFormat baseFormat, AttributeFormat relativeFormat, Trait trait, BiFunction<SpellTraits, Float, @NotNull T> valueGetter) {
+        return create(id, baseFormat, relativeFormat, trait, valueGetter, false);
+    }
+
+    public static <T extends @NotNull Number> SpellAttribute<T> create(SpellAttributeType id, AttributeFormat baseFormat, AttributeFormat relativeFormat, Trait trait, Float2ObjectFunction<@NotNull T> valueGetter, boolean detrimental) {
+        return create(id, baseFormat, relativeFormat, trait, (traits, value) -> valueGetter.get(value.floatValue()), detrimental);
+    }
+
+    public static <T extends @NotNull Number> SpellAttribute<T> create(SpellAttributeType id, AttributeFormat baseFormat, AttributeFormat relativeFormat, Trait trait, BiFunction<SpellTraits, Float, @NotNull T> valueGetter, boolean detrimental) {
+        return new SpellAttribute<>(trait, valueGetter, (CustomisedSpellType<?> type, List<Text> tooltip) -> {
+            float traitAmount = type.traits().get(trait);
+            float traitDifference = type.relativeTraits().get(trait);
+            float value = valueGetter.apply(type.traits(), traitAmount).floatValue();
+
+            var b = baseFormat.getBase(id.name(), value, "equals", Formatting.LIGHT_PURPLE);
+            if (traitDifference != 0) {
+                tooltip.add(b.append(relativeFormat.getRelative(Text.empty(), valueGetter.apply(type.traits(), traitAmount - traitDifference).floatValue(), value, detrimental)));
+                tooltip.add(AttributeFormat.formatTraitDifference(trait, traitDifference));
+            } else {
+                tooltip.add(b);
+            }
+        });
+    }
+
+    public static SpellAttribute<Boolean> createConditional(SpellAttributeType id, Trait trait, Float2ObjectFunction<Boolean> valueGetter) {
+        return createConditional(id, trait, (traits, value) -> valueGetter.get(value.floatValue()));
+    }
+
+    public static SpellAttribute<Boolean> createConditional(SpellAttributeType id, Trait trait, BiFunction<SpellTraits, Float, @NotNull Boolean> valueGetter) {
+        return new SpellAttribute<>(trait, valueGetter, (CustomisedSpellType<?> type, List<Text> tooltip) -> {
+            float difference = type.relativeTraits().get(trait);
+            Text value = AttributeFormat.formatAttributeLine(id.name());
+            if (!valueGetter.apply(type.traits(), type.traits().get(trait))) {
+                value = value.copy().formatted(Formatting.STRIKETHROUGH, Formatting.DARK_GRAY);
+            }
+            tooltip.add(value);
+            if (difference != 0) {
+                tooltip.add(AttributeFormat.formatTraitDifference(trait, difference));
+            }
+        });
+    }
+
+    public static <T extends Enum<T>> SpellAttribute<T> createEnumerated(SpellAttributeType id, Trait trait, Float2ObjectFunction<T> valueGetter) {
+        return createEnumerated(id, trait, (traits, value) -> valueGetter.get(value.floatValue()));
+    }
+
+    public static <T extends Enum<T>> SpellAttribute<T> createEnumerated(SpellAttributeType id, Trait trait, BiFunction<SpellTraits, Float, @NotNull T> valueGetter) {
+        Function<T, Text> cache = Util.memoize(t -> Text.translatable(Util.createTranslationKey("spell_attribute", id.id().withPath(p -> p + "." + t.name().toLowerCase(Locale.ROOT)))));
+        return new SpellAttribute<>(trait, valueGetter, (CustomisedSpellType<?> type, List<Text> tooltip) -> {
+            T t = valueGetter.apply(type.traits(), type.traits().get(trait));
+
+            if (t != null) {
+                int max = t.getClass().getEnumConstants().length;
+                tooltip.add(Text.translatable(" %s (%s/%s)", cache.apply(t), Text.literal("" + (t.ordinal() + 1)).formatted(Formatting.LIGHT_PURPLE), max).formatted(Formatting.DARK_PURPLE));
+            }
+            float difference = type.relativeTraits().get(trait);
+            if (difference != 0) {
+                tooltip.add(AttributeFormat.formatTraitDifference(trait, difference));
+            }
+        });
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/attribute/SpellAttributeType.java

@@ -0,0 +1,59 @@
+package com.minelittlepony.unicopia.ability.magic.spell.attribute;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import com.minelittlepony.unicopia.Unicopia;
+import net.minecraft.text.Text;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.Util;
+
+public record SpellAttributeType(Identifier id, Text name) {
+    public static final List<SpellAttributeType> REGISTRY = new ArrayList<>();
+
+    @Deprecated
+    public static final SpellAttributeType CAST_ON_LOCATION = register("cast_on.location");
+    public static final SpellAttributeType FOLLOWS_TARGET = register("follows_target");
+
+    public static final SpellAttributeType PERMIT_ITEMS = register("permit_items");
+    public static final SpellAttributeType PERMIT_PASSIVE = register("permit_passive");
+    public static final SpellAttributeType PERMIT_HOSTILE = register("permit_hostile");
+    public static final SpellAttributeType PERMIT_PLAYER = register("permit_player");
+
+    public static final SpellAttributeType FOCUSED_ENTITY = register("focused_entity");
+    public static final SpellAttributeType RANGE = register("range");
+    public static final SpellAttributeType DURATION = register("duration");
+    public static final SpellAttributeType STRENGTH = register("strength");
+    public static final SpellAttributeType VELOCITY = register("velocity");
+    public static final SpellAttributeType VERTICAL_VELOCITY = register("vertical_velocity");
+    public static final SpellAttributeType HANG_TIME = register("hang_time");
+    public static final SpellAttributeType PUSHING_POWER = register("pushing_power");
+    public static final SpellAttributeType CAUSES_LEVITATION = register("causes_levitation");
+    public static final SpellAttributeType AFFECTS = register("affects");
+    public static final SpellAttributeType DAMAGE_TO_TARGET = register("damage_to_target");
+    public static final SpellAttributeType SIMULTANIOUS_TARGETS = register("simultanious_targets");
+    public static final SpellAttributeType COST_PER_INDIVIDUAL = register("cost_per_individual");
+    public static final SpellAttributeType EXPLOSION_STRENGTH = register("explosion_strength");
+    public static final SpellAttributeType PROJECTILE_COUNT = register("projectile_count");
+    public static final SpellAttributeType ORB_COUNT = register("orb_count");
+    public static final SpellAttributeType WAVE_SIZE = register("wave_size");
+    public static final SpellAttributeType FOLLOW_RANGE = register("follow_range");
+    public static final SpellAttributeType LIGHT_TARGET = register("light_target");
+    public static final SpellAttributeType STICK_TO_TARGET = register("stick_to_target");
+    public static final SpellAttributeType SOAPINESS = register("soapiness");
+    public static final SpellAttributeType CAST_ON = register("cast_on");
+
+    public static final SpellAttributeType TARGET_PREFERENCE = register("target_preference");
+    public static final SpellAttributeType CASTER_PREFERENCE = register("caster_preference");
+    public static final SpellAttributeType NEGATES_FALL_DAMAGE = register("negates_fall_damage");
+
+    public SpellAttributeType(Identifier id) {
+        this(id, Text.translatable(Util.createTranslationKey("spell_attribute", id)));
+    }
+
+    public static SpellAttributeType register(String name) {
+        SpellAttributeType type = new SpellAttributeType(Unicopia.id(name));
+        REGISTRY.add(type);
+        return type;
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/attribute/TooltipFactory.java

@@ -0,0 +1,36 @@
+package com.minelittlepony.unicopia.ability.magic.spell.attribute;
+
+import java.util.List;
+import java.util.function.Predicate;
+
+import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellType;
+import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
+
+import net.minecraft.text.Text;
+
+public interface TooltipFactory {
+    TooltipFactory EMPTY = (type, tooltip) -> {};
+
+    void appendTooltip(CustomisedSpellType<?> type, List<Text> tooltip);
+
+    static TooltipFactory of(TooltipFactory...lines) {
+        return (type, tooltip) -> {
+            for (var line : lines) {
+                line.appendTooltip(type, tooltip);
+            }
+        };
+    }
+
+    static TooltipFactory of(Text line) {
+        return (type, tooltip) -> tooltip.add(line);
+    }
+
+    default TooltipFactory conditionally(Predicate<SpellTraits> condition) {
+        TooltipFactory self = this;
+        return (type, tooltip) -> {
+            if (condition.test(type.traits())) {
+                self.appendTooltip(type, tooltip);
+            }
+        };
+    }
+}

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/AbstractSpell.java

@@ -2,69 +2,77 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
 import java.util.UUID;
 
-import com.minelittlepony.unicopia.Affinity;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.Spell;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
+import com.minelittlepony.unicopia.network.track.DataTracker;
+import com.minelittlepony.unicopia.network.track.TrackableDataType;
+import com.minelittlepony.unicopia.server.world.Ether;
 
 import net.minecraft.nbt.NbtCompound;
 
 public abstract class AbstractSpell implements Spell {
 
-    private boolean dead;
-    private boolean dying;
-    private boolean dirty;
-    private boolean hidden;
-    private boolean destroyed;
-
-    private CustomisedSpellType<?> type;
-
     private UUID uuid = UUID.randomUUID();
+    private final CustomisedSpellType<?> type;
+
+    protected final DataTracker dataTracker = new DataTracker(0);
+
+    private final DataTracker.Entry<Boolean> dead = dataTracker.startTracking(TrackableDataType.BOOLEAN, false);
+    private final DataTracker.Entry<Boolean> dying = dataTracker.startTracking(TrackableDataType.BOOLEAN, false);
+    private boolean dirty;
+    private final DataTracker.Entry<Boolean> hidden = dataTracker.startTracking(TrackableDataType.BOOLEAN, false);
+    private boolean destroyed;
 
     protected AbstractSpell(CustomisedSpellType<?> type) {
         this.type = type;
     }
 
+    @Override
+    public final DataTracker getDataTracker() {
+        return dataTracker;
+    }
+
     @Override
     public final UUID getUuid() {
         return uuid;
     }
 
-    @Override
-    public final SpellType<?> getType() {
+    protected final SpellType<?> getType() {
         return type.type();
     }
 
+    @Override
     public final CustomisedSpellType<?> getTypeAndTraits() {
         return type;
     }
 
-    @Override
-    public final SpellTraits getTraits() {
+    protected final SpellTraits getTraits() {
         return type.traits();
     }
 
     @Override
     public final void setDead() {
-        dying = true;
-        setDirty();
+        dying.set(true);
     }
 
     @Override
     public final boolean isDead() {
-        return dead;
+        return dead.get();
     }
 
     @Override
     public final boolean isDying() {
-        return dying;
+        return dying.get();
     }
 
+    @Deprecated
     @Override
     public final boolean isDirty() {
         return dirty;
     }
 
+    @Deprecated
     @Override
     public final void setDirty() {
         dirty = true;
@@ -72,25 +80,17 @@ public abstract class AbstractSpell implements Spell {
 
     @Override
     public final boolean isHidden() {
-        return hidden;
+        return hidden.get();
     }
 
     @Override
     public final void setHidden(boolean hidden) {
-        this.hidden = hidden;
-    }
-
-    @Override
-    public Affinity getAffinity() {
-        return getType().getAffinity();
-    }
-
-    protected void onDestroyed(Caster<?> caster) {
+        this.hidden.set(hidden);
     }
 
     @Override
     public void tickDying(Caster<?> caster) {
-        dead = true;
+        dead.set(true);
     }
 
     @Override
@@ -103,11 +103,17 @@ public abstract class AbstractSpell implements Spell {
         onDestroyed(caster);
     }
 
+    protected void onDestroyed(Caster<?> caster) {
+        if (!caster.isClient()) {
+            Ether.get(caster.asWorld()).remove(this, caster);
+        }
+    }
+
     @Override
     public void toNBT(NbtCompound compound) {
-        compound.putBoolean("dying", dying);
-        compound.putBoolean("dead", dead);
-        compound.putBoolean("hidden", hidden);
+        compound.putBoolean("dying", dying.get());
+        compound.putBoolean("dead", dead.get());
+        compound.putBoolean("hidden", hidden.get());
         compound.putUuid("uuid", uuid);
         compound.put("traits", getTraits().toNbt());
     }
@@ -118,12 +124,9 @@ public abstract class AbstractSpell implements Spell {
         if (compound.containsUuid("uuid")) {
             uuid = compound.getUuid("uuid");
         }
-        dying = compound.getBoolean("dying");
-        dead = compound.getBoolean("dead");
-        hidden = compound.getBoolean("hidden");
-        if (compound.contains("traits")) {
-            type = type.type().withTraits(SpellTraits.fromNbt(compound.getCompound("traits")).orElse(SpellTraits.EMPTY));
-        }
+        dying.set(compound.getBoolean("dying"));
+        dead.set(compound.getBoolean("dead"));
+        hidden.set(compound.getBoolean("hidden"));
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/AreaProtectionSpell.java

@@ -2,7 +2,13 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.AbstractAreaEffectSpell;
+import com.minelittlepony.unicopia.ability.magic.spell.CastingMethod;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
+import com.minelittlepony.unicopia.ability.magic.spell.Spell;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.CastOn;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.mob.UEntities;
@@ -22,10 +28,19 @@ public class AreaProtectionSpell extends AbstractAreaEffectSpell {
             .with(Trait.STRENGTH, 30)
             .build();
 
+    private static final SpellAttribute<CastOn> CAST_ON = SpellAttribute.createEnumerated(SpellAttributeType.CAST_ON, Trait.FOCUS, focus -> focus > 0 ? CastOn.SELF : CastOn.LOCATION);
+
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(CAST_ON, RANGE);
+
     protected AreaProtectionSpell(CustomisedSpellType<?> type) {
         super(type);
     }
 
+    @Override
+    public Spell prepareForCast(Caster<?> caster, CastingMethod method) {
+        return method == CastingMethod.STAFF || CAST_ON.get(getTraits()) == CastOn.LOCATION ? toPlaceable() : this;
+    }
+
     @Override
     public boolean tick(Caster<?> source, Situation situation) {
 
@@ -33,7 +48,7 @@ public class AreaProtectionSpell extends AbstractAreaEffectSpell {
             return false;
         }
 
-        float radius = (float)getDrawDropOffRange(source);
+        float radius = (float)getRange(source);
 
         if (source.isClient()) {
             Vec3d origin = source.getOriginVector();
@@ -44,7 +59,7 @@ public class AreaProtectionSpell extends AbstractAreaEffectSpell {
                 }
             });
         } else {
-            Ether.get(source.asWorld()).getOrCreate(this, source);
+            Ether.get(source.asWorld()).getOrCreate(this, source).setRadius(radius);
         }
 
         source.findAllSpellsInRange(radius, e -> isValidTarget(source, e)).filter(caster -> !caster.hasCommonOwner(source)).forEach(caster -> {
@@ -54,17 +69,9 @@ public class AreaProtectionSpell extends AbstractAreaEffectSpell {
         return !isDead();
     }
 
-    @Override
-    protected void onDestroyed(Caster<?> caster) {
-        Ether.get(caster.asWorld()).remove(this, caster);
-    }
-
-    /**
-     * Calculates the maximum radius of the shield. aka The area of effect.
-     */
-    public double getDrawDropOffRange(Caster<?> source) {
+    private double getRange(Caster<?> source) {
         float multiplier = source instanceof Pony pony && pony.asEntity().isSneaking() ? 1 : 2;
-        float min = 4 + getTraits().get(Trait.POWER);
+        float min = RANGE.get(getTraits());
         double range = (min + (source.getLevel().getScaled(4) * 2)) / multiplier;
         if (source instanceof Pony && range > 2) {
             range = Math.sqrt(range);
@@ -74,7 +81,7 @@ public class AreaProtectionSpell extends AbstractAreaEffectSpell {
 
     public boolean blocksMagicFor(Caster<?> source, Caster<?> other, Vec3d position) {
         return !FriendshipBraceletItem.isComrade(other, other.asEntity())
-                && source.getOriginVector().distanceTo(position) <= getDrawDropOffRange(source);
+                && source.getOriginVector().distanceTo(position) <= getRange(source);
     }
 
     protected boolean isValidTarget(Caster<?> source, Entity entity) {

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/AttractionUtils.java

@@ -3,6 +3,7 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.entity.Living;
+import com.minelittlepony.unicopia.entity.effect.EffectUtils;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.item.enchantment.UEnchantments;
 
@@ -61,12 +62,10 @@ public interface AttractionUtils {
         return Pony.of(entity).map(pony -> {
             double force = 0.75;
 
-            if (pony.getCompositeRace().canUseEarth()) {
+            if (EffectUtils.hasExtraDefenses(pony.asEntity())) {
+                force /= 12;
+            } else if (pony.getCompositeRace().canUseEarth()) {
                 force /= 2;
-
-                if (pony.asEntity().isSneaking()) {
-                    force /= 6;
-                }
             } else if (pony.getCompositeRace().canFly()) {
                 force *= 2;
             }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/AttractiveSpell.java

@@ -2,6 +2,9 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.*;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.EntityReference;
 import com.minelittlepony.unicopia.entity.Living;
@@ -13,7 +16,6 @@ import com.minelittlepony.unicopia.projectile.ProjectileDelegate;
 import com.minelittlepony.unicopia.util.shape.Sphere;
 
 import net.minecraft.entity.Entity;
-import net.minecraft.entity.ItemEntity;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.particle.ParticleTypes;
 import net.minecraft.util.hit.EntityHitResult;
@@ -21,6 +23,10 @@ import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
 
 public class AttractiveSpell extends ShieldSpell implements HomingSpell, TimedSpell, ProjectileDelegate.EntityHitListener {
+    static final SpellAttribute<Boolean> TARGET_FOCUSED_ENTITY = SpellAttribute.createConditional(SpellAttributeType.FOCUSED_ENTITY, Trait.ORDER, order -> order >= 20);
+    static final SpellAttribute<Boolean> STICK_TO_TARGET = SpellAttribute.createConditional(SpellAttributeType.STICK_TO_TARGET, Trait.CHAOS, chaos -> chaos > 0);
+    static final TooltipFactory TARGET = (type, tooltip) -> (TARGET_FOCUSED_ENTITY.get(type.traits()) ? TARGET_FOCUSED_ENTITY : ShieldSpell.TARGET).appendTooltip(type, tooltip);
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(TIME, RANGE, TARGET, STICK_TO_TARGET, CAST_ON);
 
     private final EntityReference<Entity> target = new EntityReference<>();
 
@@ -28,7 +34,8 @@ public class AttractiveSpell extends ShieldSpell implements HomingSpell, TimedSp
 
     protected AttractiveSpell(CustomisedSpellType<?> type) {
         super(type);
-        timer = new Timer((120 + (int)(getTraits().get(Trait.FOCUS, 0, 160) * 19)) * 20);
+        timer = new Timer(TIME.get(getTraits()));
+        dataTracker.startTracking(target);
     }
 
     @Override
@@ -38,14 +45,10 @@ public class AttractiveSpell extends ShieldSpell implements HomingSpell, TimedSp
 
     @Override
     public boolean tick(Caster<?> caster, Situation situation) {
-        if (getType() != SpellType.DARK_VORTEX) {
-            timer.tick();
+        timer.tick();
 
-            if (timer.getTicksRemaining() <= 0) {
-                return false;
-            }
-
-            setDirty();
+        if (timer.getTicksRemaining() <= 0) {
+            return false;
         }
 
         target.getOrEmpty(caster.asWorld())
@@ -73,17 +76,9 @@ public class AttractiveSpell extends ShieldSpell implements HomingSpell, TimedSp
         });
     }
 
-    @Override
-    public double getDrawDropOffRange(Caster<?> caster) {
-        return 10 + (caster.getLevel().getScaled(8) * 2);
-    }
-
     @Override
     protected boolean isValidTarget(Caster<?> source, Entity entity) {
-        if (target.referenceEquals(entity)) {
-            return true;
-        }
-        return getTraits().get(Trait.KNOWLEDGE) > 10 ? entity instanceof ItemEntity : super.isValidTarget(source, entity);
+        return target.referenceEquals(entity) || super.isValidTarget(source, entity);
     }
 
     @Override
@@ -133,7 +128,7 @@ public class AttractiveSpell extends ShieldSpell implements HomingSpell, TimedSp
 
     @Override
     public boolean setTarget(Entity target) {
-        if (getTraits().get(Trait.ORDER) >= 20) {
+        if (TARGET_FOCUSED_ENTITY.get(getTraits())) {
             this.target.set(target);
             target.setGlowing(true);
             return true;
@@ -149,7 +144,7 @@ public class AttractiveSpell extends ShieldSpell implements HomingSpell, TimedSp
 
     @Override
     public void onImpact(MagicProjectileEntity projectile, EntityHitResult hit) {
-        if (!isDead() && getTraits().get(Trait.CHAOS) > 0) {
+        if (!isDead() && STICK_TO_TARGET.get(getTraits())) {
             setDead();
             Caster.of(hit.getEntity()).ifPresent(caster -> getTypeAndTraits().apply(caster, CastingMethod.INDIRECT));
         }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/AwkwardSpell.java

@@ -40,8 +40,6 @@ public class AwkwardSpell extends AbstractSpell implements TimedSpell {
             if (timer.getTicksRemaining() <= 0) {
                 return false;
             }
-
-            setDirty();
         }
 
         if (source.isClient()) {

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/BubbleSpell.java

@@ -6,18 +6,24 @@ import java.util.UUID;
 import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.*;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.*;
+import com.minelittlepony.unicopia.entity.AttributeContainer;
 import com.minelittlepony.unicopia.entity.mob.UEntityAttributes;
 import com.minelittlepony.unicopia.entity.player.Pony;
+import com.minelittlepony.unicopia.network.track.DataTracker;
+import com.minelittlepony.unicopia.network.track.TrackableDataType;
 import com.minelittlepony.unicopia.particle.UParticles;
 import com.minelittlepony.unicopia.projectile.MagicProjectileEntity;
 import com.minelittlepony.unicopia.projectile.ProjectileDelegate;
 import com.minelittlepony.unicopia.util.shape.Sphere;
 
 import net.minecraft.entity.Entity;
-import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.attribute.*;
 import net.minecraft.entity.attribute.EntityAttributeModifier.Operation;
 import net.minecraft.nbt.NbtCompound;
@@ -46,17 +52,21 @@ public class BubbleSpell extends AbstractSpell implements TimedSpell,
             .with(Trait.POWER, 1)
             .build();
 
+    private static final SpellAttribute<Integer> SOAPINESS = SpellAttribute.create(SpellAttributeType.SOAPINESS, AttributeFormat.REGULAR, Trait.POWER, power -> (int)(power * 2));
+
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(TimedSpell.TIME, SOAPINESS);
+
     private final Timer timer;
 
-    private int struggles;
-
     private float prevRadius;
-    private float radius;
+    private DataTracker.Entry<Float> radius;
+    private DataTracker.Entry<Integer> struggles;
 
     protected BubbleSpell(CustomisedSpellType<?> type) {
         super(type);
-        timer = new Timer((120 + (int)(getTraits().get(Trait.FOCUS, 0, 160) * 19)) * 20);
-        struggles = (int)(getTraits().get(Trait.POWER) * 2);
+        timer = new Timer(TIME.get(getTraits()));
+        radius = dataTracker.startTracking(TrackableDataType.FLOAT, 0F);
+        struggles = dataTracker.startTracking(TrackableDataType.INT, SOAPINESS.get(getTraits()));
     }
 
     @Override
@@ -65,27 +75,22 @@ public class BubbleSpell extends AbstractSpell implements TimedSpell,
     }
 
     public float getRadius(float tickDelta) {
-        return MathHelper.lerp(tickDelta, prevRadius, radius);
+        return MathHelper.lerp(tickDelta, prevRadius, radius.get());
     }
 
     @Override
     public boolean apply(Caster<?> source) {
 
-        if (getType().isOn(source)) {
-            source.getSpellSlot().removeWhere(getType(), true);
+        if (source.getSpellSlot().removeWhere(getType())) {
             return false;
         }
 
         Entity entity = source.asEntity();
 
-        if (entity instanceof LivingEntity l) {
-            MODIFIERS.forEach((attribute, modifier) -> {
-                if (l.getAttributes().hasAttribute(attribute)) {
-                    l.getAttributeInstance(attribute).addPersistentModifier(modifier);
-                }
-            });
+        if (source instanceof AttributeContainer l) {
+            l.applyAttributeModifiers(MODIFIERS, false, true);
         }
-        radius = Math.max(entity.getHeight(), entity.getWidth()) * 1.2F;
+        radius.set(Math.max(entity.getHeight(), entity.getWidth()) * 1.2F);
         source.playSound(USounds.ENTITY_PLAYER_UNICORN_TELEPORT, 1);
         entity.addVelocity(0, 0.2F * source.getPhysics().getGravitySignum(), 0);
         Living.updateVelocity(entity);
@@ -105,7 +110,7 @@ public class BubbleSpell extends AbstractSpell implements TimedSpell,
 
         boolean done = timer.getTicksRemaining() <= 0;
 
-        source.spawnParticles(source.getOriginVector().add(0, 1, 0), new Sphere(true, radius * (done ? 0.25F : 0.5F)), done ? 13 : 1, pos -> {
+        source.spawnParticles(source.getOriginVector().add(0, 1, 0), new Sphere(true, radius.get() * (done ? 0.25F : 0.5F)), done ? 13 : 1, pos -> {
             source.addParticle(done ? ParticleTypes.BUBBLE_POP : UParticles.BUBBLE, pos, Vec3d.ZERO);
         });
 
@@ -113,8 +118,6 @@ public class BubbleSpell extends AbstractSpell implements TimedSpell,
             return false;
         }
 
-        setDirty();
-
         source.asEntity().addVelocity(
                 MathHelper.sin(source.asEntity().age / 6F) / 50F,
                 MathHelper.sin(source.asEntity().age / 6F) / 50F,
@@ -123,13 +126,14 @@ public class BubbleSpell extends AbstractSpell implements TimedSpell,
 
         source.asEntity().fallDistance = 0;
 
-        prevRadius = radius;
+        prevRadius = radius.get();
 
         if (source instanceof Pony pony && pony.sneakingChanged() && pony.asEntity().isSneaking()) {
-            setDirty();
-            radius += 0.5F;
+            radius.set(radius.get() + 0.5F);
             source.playSound(USounds.SPELL_BUBBLE_DISTURB, 1);
-            if (struggles-- <= 0) {
+            int s = struggles.get() - 1;
+            struggles.set(s);
+            if (s <= 0) {
                 setDead();
                 return false;
             }
@@ -140,12 +144,9 @@ public class BubbleSpell extends AbstractSpell implements TimedSpell,
 
     @Override
     protected void onDestroyed(Caster<?> source) {
-        if (source.asEntity() instanceof LivingEntity l) {
-            MODIFIERS.forEach((attribute, modifier) -> {
-                if (l.getAttributes().hasAttribute(attribute)) {
-                    l.getAttributeInstance(attribute).removeModifier(modifier.getId());
-                }
-            });
+        super.onDestroyed(source);
+        if (source instanceof AttributeContainer l) {
+            l.applyAttributeModifiers(MODIFIERS, false, false);
         }
         source.playSound(USounds.ENTITY_PLAYER_UNICORN_TELEPORT, 1);
     }
@@ -161,16 +162,16 @@ public class BubbleSpell extends AbstractSpell implements TimedSpell,
     @Override
     public void toNBT(NbtCompound compound) {
         super.toNBT(compound);
-        compound.putInt("struggles", struggles);
-        compound.putFloat("radius", radius);
+        compound.putInt("struggles", struggles.get());
+        compound.putFloat("radius", radius.get());
         timer.toNBT(compound);
     }
 
     @Override
     public void fromNBT(NbtCompound compound) {
         super.fromNBT(compound);
-        struggles = compound.getInt("struggles");
-        radius = compound.getFloat("radius");
+        struggles.set(compound.getInt("struggles"));
+        radius.set(compound.getFloat("radius"));
         timer.fromNBT(compound);
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/CatapultSpell.java

@@ -1,5 +1,6 @@
 package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
+import java.util.List;
 import java.util.function.Consumer;
 
 import org.jetbrains.annotations.Nullable;
@@ -7,6 +8,11 @@ import org.jetbrains.annotations.Nullable;
 import com.minelittlepony.unicopia.UTags;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.Affects;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.mixin.MixinFallingBlockEntity;
@@ -17,10 +23,16 @@ import com.minelittlepony.unicopia.projectile.ProjectileDelegate;
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.FallingBlockEntity;
+import net.minecraft.entity.LivingEntity;
+import net.minecraft.entity.effect.StatusEffectInstance;
+import net.minecraft.entity.effect.StatusEffects;
+import net.minecraft.text.Text;
 import net.minecraft.util.hit.BlockHitResult;
 import net.minecraft.util.hit.EntityHitResult;
 import net.minecraft.util.math.BlockPos;
+import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
+import net.minecraft.util.math.random.Random;
 import net.minecraft.world.World;
 
 /**
@@ -37,20 +49,51 @@ public class CatapultSpell extends AbstractSpell implements ProjectileDelegate.B
     private static final float HORIZONTAL_VARIANCE = 0.25F;
     private static final float MAX_STRENGTH = 120;
 
+    private static final SpellAttribute<Float> LAUNCH_SPEED = SpellAttribute.create(SpellAttributeType.VERTICAL_VELOCITY, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.STRENGTH, strength -> 0.1F + (MathHelper.clamp(strength, -MAX_STRENGTH, MAX_STRENGTH) - 40) / 16F);
+    private static final SpellAttribute<Float> HANG_TIME = SpellAttribute.create(SpellAttributeType.HANG_TIME, AttributeFormat.TIME, AttributeFormat.PERCENTAGE, Trait.AIR, air -> 50 + (int)MathHelper.clamp(air, 0, 10) * 20F);
+    private static final SpellAttribute<Float> PUSHING_POWER = SpellAttribute.create(SpellAttributeType.PUSHING_POWER, AttributeFormat.REGULAR, Trait.POWER, power -> 1 + MathHelper.clamp(power, 0, 10) / 10F);
+    private static final SpellAttribute<Boolean> CAUSES_LEVITATION = SpellAttribute.createConditional(SpellAttributeType.CAUSES_LEVITATION, Trait.FOCUS, focus -> focus > 50);
+    private static final SpellAttribute<Affects> AFFECTS = SpellAttribute.createEnumerated(SpellAttributeType.AFFECTS, Trait.ORDER, order -> {
+        if (order <= 0) {
+            return Affects.BOTH;
+        } else if (order <= 10) {
+            return Affects.ENTITIES;
+        }
+        return Affects.BLOCKS;
+    });
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(LAUNCH_SPEED, HANG_TIME, PUSHING_POWER, CAUSES_LEVITATION, AFFECTS);
+
+    static void appendTooltip(CustomisedSpellType<? extends CatapultSpell> type, List<Text> tooltip) {
+        TOOLTIP.appendTooltip(type, tooltip);
+    }
+
     protected CatapultSpell(CustomisedSpellType<?> type) {
         super(type);
     }
 
     @Override
     public void onImpact(MagicProjectileEntity projectile, BlockHitResult hit) {
+        if (!AFFECTS.get(getTraits()).allowsBlocks()) {
+            return;
+        }
+
         if (!projectile.isClient() && projectile instanceof MagicBeamEntity source && source.canModifyAt(hit.getBlockPos())) {
-            createBlockEntity(projectile.getWorld(), hit.getBlockPos(), e -> apply(source, e));
+            createBlockEntity(projectile.getWorld(), hit.getBlockPos(), e -> {
+                e.setOnGround(true);
+                apply(source, e);
+                e.setOnGround(false);
+            });
         }
     }
 
     @Override
     public void onImpact(MagicProjectileEntity projectile, EntityHitResult hit) {
         if (!projectile.isClient() && projectile instanceof MagicBeamEntity source) {
+            Entity e = hit.getEntity();
+            if (!(e instanceof FallingBlockEntity) && !AFFECTS.get(getTraits()).allowsEntities()) {
+                return;
+            }
+
             apply(source, hit.getEntity());
         }
     }
@@ -67,16 +110,40 @@ public class CatapultSpell extends AbstractSpell implements ProjectileDelegate.B
     }
 
     protected void apply(Caster<?> caster, Entity e) {
-        Vec3d vel = caster.asEntity().getVelocity();
-        if (Math.abs(e.getVelocity().y) > 0.5) {
-            e.setVelocity(caster.asEntity().getVelocity());
+
+        float power = 1 + getTraits().get(Trait.POWER, 0, 10) / 10F;
+
+        if (!e.isOnGround()) {
+            e.setVelocity(caster.asEntity().getVelocity().multiply(power));
         } else {
+            Random rng = caster.asWorld().random;
             e.addVelocity(
-                ((caster.asWorld().random.nextFloat() * HORIZONTAL_VARIANCE) - HORIZONTAL_VARIANCE + vel.x * 0.8F) * 0.1F,
-                0.1F + (getTraits().get(Trait.STRENGTH, -MAX_STRENGTH, MAX_STRENGTH) - 40) / 16D,
-                ((caster.asWorld().random.nextFloat() * HORIZONTAL_VARIANCE) - HORIZONTAL_VARIANCE + vel.z * 0.8F) * 0.1F
+                rng.nextTriangular(0, HORIZONTAL_VARIANCE) * 0.1F,
+                LAUNCH_SPEED.get(getTraits()),
+                rng.nextTriangular(0, HORIZONTAL_VARIANCE) * 0.1F
             );
+
+            int hoverDuration = HANG_TIME.get(getTraits()).intValue();
+            boolean noGravity = CAUSES_LEVITATION.get(getTraits());
+
+            if (e instanceof LivingEntity l) {
+                if (l.hasStatusEffect(StatusEffects.SLOW_FALLING)) {
+                    l.removeStatusEffect(StatusEffects.SLOW_FALLING);
+                }
+                l.addStatusEffect(new StatusEffectInstance(StatusEffects.SLOW_FALLING, hoverDuration, 1));
+            }
+
+            if (noGravity || e instanceof FallingBlockEntity && (!e.getWorld().getBlockState(e.getBlockPos().up()).isReplaceable())) {
+                if (e instanceof LivingEntity l) {
+                    l.addStatusEffect(new StatusEffectInstance(StatusEffects.LEVITATION, 200, 1));
+                } else {
+                    e.setNoGravity(true);
+                }
+            }
         }
+
+        e.velocityDirty = true;
+        e.velocityModified = true;
     }
 
     static void createBlockEntity(World world, BlockPos bpos, @Nullable Consumer<Entity> apply) {
@@ -101,7 +168,5 @@ public class CatapultSpell extends AbstractSpell implements ProjectileDelegate.B
             apply.accept(e);
         }
         world.spawnEntity(e);
-
-        e.updateVelocity(HORIZONTAL_VARIANCE, pos);
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/CustomisedSpellType.java

@@ -1,26 +1,45 @@
 package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Supplier;
+
 import org.jetbrains.annotations.Nullable;
 
+import com.minelittlepony.unicopia.InteractionManager;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.SpellPredicate;
 import com.minelittlepony.unicopia.ability.magic.spell.CastingMethod;
 import com.minelittlepony.unicopia.ability.magic.spell.Spell;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
+import com.minelittlepony.unicopia.client.TextHelper;
+import com.minelittlepony.unicopia.entity.effect.EffectUtils;
 
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NbtCompound;
+import net.minecraft.text.MutableText;
+import net.minecraft.text.Text;
+import net.minecraft.util.Formatting;
 import net.minecraft.util.TypedActionResult;
 
 public record CustomisedSpellType<T extends Spell> (
         SpellType<T> type,
-        SpellTraits traits
+        SpellTraits traits,
+        Supplier<SpellTraits> traitsDifferenceSupplier
     ) implements SpellPredicate<T> {
 
     public boolean isEmpty() {
         return type.isEmpty();
     }
 
+    public boolean isStackable() {
+        return type().isStackable();
+    }
+
+    public SpellTraits relativeTraits() {
+        return traitsDifferenceSupplier.get();
+    }
+
     public T create() {
         try {
             return type.getFactory().create(this);
@@ -31,6 +50,14 @@ public record CustomisedSpellType<T extends Spell> (
         return null;
     }
 
+    @Nullable
+    public T create(NbtCompound compound) {
+        T spell = create();
+        if (spell != null) {
+            spell.fromNBT(compound);
+        }
+        return spell;
+    }
 
     @Nullable
     public T apply(Caster<?> caster, CastingMethod method) {
@@ -50,29 +77,47 @@ public record CustomisedSpellType<T extends Spell> (
     }
 
     @Override
-    public boolean test(Spell spell) {
-        return type.test(spell) && spell.getTraits().equals(traits);
+    public boolean test(@Nullable Spell spell) {
+        return spell != null && spell.getTypeAndTraits().equals(this);
     }
 
     public ItemStack getDefaultStack() {
         return traits.applyTo(type.getDefualtStack());
     }
 
+    public void appendTooltip(List<Text> lines) {
+        MutableText lore = Text.translatable(type().getTranslationKey() + ".lore").formatted(type().getAffinity().getColor());
+
+        if (!InteractionManager.getInstance().getClientSpecies().canCast()) {
+            lore = lore.formatted(Formatting.OBFUSCATED);
+        }
+        lines.addAll(TextHelper.wrap(lore, 180).toList());
+        float corruption = ((int)traits().getCorruption() * 10) + type().getAffinity().getCorruption();
+        List<Text> modifiers = new ArrayList<>();
+        type.getTooltip().appendTooltip(this, modifiers);
+        if (corruption != 0) {
+            modifiers.add(EffectUtils.formatModifierChange("affinity.unicopia.corruption", corruption, true));
+        }
+        if (!modifiers.isEmpty()) {
+            lines.add(Text.empty());
+            lines.add(Text.translatable("affinity.unicopia.when_cast").formatted(Formatting.GRAY));
+            lines.addAll(modifiers);
+        }
+
+    }
+
     public TypedActionResult<CustomisedSpellType<?>> toAction() {
         return isEmpty() ? TypedActionResult.fail(this) : TypedActionResult.pass(this);
     }
 
-    public NbtCompound toNBT() {
-        NbtCompound tag = new NbtCompound();
-        type.toNbt(tag);
-        tag.put("traits", traits.toNbt());
-        return tag;
+    public NbtCompound toNbt(NbtCompound compound) {
+        type.toNbt(compound);
+        compound.put("traits", traits.toNbt());
+        return compound;
     }
 
-    public static CustomisedSpellType<?> fromNBT(NbtCompound compound) {
-        SpellType<?> type = SpellType.getKey(compound);
-        SpellTraits traits = SpellTraits.fromNbt(compound.getCompound("traits")).orElse(type.getTraits());
-
-        return type.withTraits(traits);
+    public static <T extends Spell> CustomisedSpellType<T> fromNBT(NbtCompound compound) {
+        SpellType<T> type = SpellType.getKey(compound);
+        return type.withTraits(SpellTraits.fromNbt(compound.getCompound("traits")).orElse(type.getTraits()));
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/DarkVortexSpell.java

@@ -17,6 +17,8 @@ import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.Living;
 import com.minelittlepony.unicopia.entity.damage.UDamageTypes;
 import com.minelittlepony.unicopia.entity.mob.CastSpellEntity;
+import com.minelittlepony.unicopia.network.track.DataTracker;
+import com.minelittlepony.unicopia.network.track.TrackableDataType;
 import com.minelittlepony.unicopia.particle.FollowingParticleEffect;
 import com.minelittlepony.unicopia.particle.LightningBoltParticleEffect;
 import com.minelittlepony.unicopia.particle.ParticleUtils;
@@ -56,7 +58,7 @@ public class DarkVortexSpell extends AbstractSpell implements ProjectileDelegate
             .with(Trait.DARKNESS, 100)
             .build();
 
-    private float accumulatedMass = 0;
+    private final DataTracker.Entry<Float> accumulatedMass = this.dataTracker.startTracking(TrackableDataType.FLOAT, 0F);
 
     private final TargetSelecter targetSelecter = new TargetSelecter(this).setFilter(this::isValidTarget).setTargetowner(true).setTargetAllies(true);
 
@@ -70,7 +72,7 @@ public class DarkVortexSpell extends AbstractSpell implements ProjectileDelegate
     // 3. force reaches 0 at distance of drawDropOffRange
 
     private double getMass() {
-        return 0.1F + accumulatedMass / 10F;
+        return 0.1F + accumulatedMass.get() / 10F;
     }
 
     public double getEventHorizonRadius() {
@@ -174,11 +176,12 @@ public class DarkVortexSpell extends AbstractSpell implements ProjectileDelegate
 
     @Override
     public void tickDying(Caster<?> source) {
-        accumulatedMass -= 0.8F;
+        float m = accumulatedMass.get() - 0.8F;
+        accumulatedMass.set(m);
         double mass = getMass() * 0.1;
         double logarithm = 1 - (1D / (1 + (mass * mass)));
         radius.update((float)Math.max(0.1, logarithm * source.asWorld().getGameRules().getInt(UGameRules.MAX_DARK_VORTEX_SIZE)), 200L);
-        if (accumulatedMass < 1) {
+        if (m < 1) {
             super.tickDying(source);
         }
 
@@ -202,7 +205,7 @@ public class DarkVortexSpell extends AbstractSpell implements ProjectileDelegate
 
     @Override
     public boolean isFriendlyTogether(Affine other) {
-        return accumulatedMass < 4;
+        return accumulatedMass.get() < 4;
     }
 
     private boolean isValidTarget(Caster<?> source, Entity entity) {
@@ -274,8 +277,7 @@ public class DarkVortexSpell extends AbstractSpell implements ProjectileDelegate
             double massOfTarget = AttractionUtils.getMass(target);
 
             if (!source.isClient() && massOfTarget != 0) {
-                accumulatedMass += massOfTarget;
-                setDirty();
+                accumulatedMass.set((float)(accumulatedMass.get() + massOfTarget));
             }
 
             target.damage(source.damageOf(UDamageTypes.GAVITY_WELL_RECOIL, source), Integer.MAX_VALUE);
@@ -303,12 +305,12 @@ public class DarkVortexSpell extends AbstractSpell implements ProjectileDelegate
     @Override
     public void toNBT(NbtCompound compound) {
         super.toNBT(compound);
-        compound.putFloat("accumulatedMass", accumulatedMass);
+        compound.putFloat("accumulatedMass", accumulatedMass.get());
     }
 
     @Override
     public void fromNBT(NbtCompound compound) {
         super.fromNBT(compound);
-        accumulatedMass = compound.getFloat("accumulatedMass");
+        accumulatedMass.set(compound.getFloat("accumulatedMass"));
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/DispellEvilSpell.java

@@ -2,6 +2,10 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.*;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.particle.LightningBoltParticleEffect;
@@ -18,6 +22,10 @@ public class DispellEvilSpell extends AbstractSpell implements ProjectileDelegat
             .with(Trait.POWER, 1)
             .build();
 
+    private static final SpellAttribute<Double> RANGE = SpellAttribute.create(SpellAttributeType.RANGE, AttributeFormat.TIME, AttributeFormat.PERCENTAGE, Trait.POWER, power -> (1 + power) * 10D);
+
+    static final TooltipFactory TOOLTIP = RANGE;
+
     protected DispellEvilSpell(CustomisedSpellType<?> type) {
         super(type);
     }
@@ -28,7 +36,7 @@ public class DispellEvilSpell extends AbstractSpell implements ProjectileDelegat
             return !isDead();
         }
 
-        source.findAllEntitiesInRange(getTraits().get(Trait.POWER) * 10, e -> e.getType() == EntityType.PHANTOM).forEach(entity -> {
+        source.findAllEntitiesInRange(RANGE.get(getTraits()), e -> e.getType() == EntityType.PHANTOM).forEach(entity -> {
             entity.damage(entity.getDamageSources().magic(), 50);
             if (entity instanceof LivingEntity l) {
                 double d = source.getOriginVector().getX() - entity.getX();

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/DisperseIllusionSpell.java

@@ -5,6 +5,10 @@ import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.SpellPredicate;
 import com.minelittlepony.unicopia.ability.magic.spell.AbstractAreaEffectSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.particle.MagicParticleEffect;
 import com.minelittlepony.unicopia.util.shape.Sphere;
@@ -15,6 +19,10 @@ import net.minecraft.util.math.Vec3d;
  * An area-effect spell that disperses illusions.
  */
 public class DisperseIllusionSpell extends AbstractAreaEffectSpell {
+    private static final SpellAttribute<Float> RANGE = SpellAttribute.create(SpellAttributeType.RANGE, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.POWER, power -> Math.max(0, 15 + power));
+    private static final SpellAttribute<Long> DURATION = SpellAttribute.create(SpellAttributeType.DURATION, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.STRENGTH, strength -> (1 + (long)strength) * 100);
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(RANGE, DURATION);
+
     protected DisperseIllusionSpell(CustomisedSpellType<?> type) {
         super(type);
     }
@@ -22,7 +30,7 @@ public class DisperseIllusionSpell extends AbstractAreaEffectSpell {
     @Override
     public boolean tick(Caster<?> source, Situation situation) {
 
-        float range = Math.max(0, 15 + getTraits().get(Trait.POWER));
+        float range = RANGE.get(getTraits());
 
         if (range == 0) {
             return false;
@@ -38,10 +46,10 @@ public class DisperseIllusionSpell extends AbstractAreaEffectSpell {
         }
 
         source.findAllSpellsInRange(range).forEach(e -> {
-            e.getSpellSlot().get(SpellPredicate.CAN_SUPPRESS, false)
+            e.getSpellSlot().get(SpellPredicate.CAN_SUPPRESS)
                 .filter(spell -> spell.isVulnerable(source, this))
                 .ifPresent(spell -> {
-                spell.onSuppressed(source, 1 + getTraits().get(Trait.STRENGTH));
+                spell.onSuppressed(source, DURATION.get(getTraits()));
                 e.playSound(USounds.SPELL_ILLUSION_DISPERSE, 0.2F, 0.5F);
             });
         });

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/DisplacementSpell.java

@@ -3,6 +3,10 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.*;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.EntityReference;
 import com.minelittlepony.unicopia.entity.damage.UDamageTypes;
@@ -16,6 +20,10 @@ import net.minecraft.util.math.Vec3d;
 
 public class DisplacementSpell extends AbstractSpell implements HomingSpell, ProjectileDelegate.EntityHitListener {
 
+    private static final SpellAttribute<Float> DAMAGE_TO_TARGET = SpellAttribute.create(SpellAttributeType.DAMAGE_TO_TARGET, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.BLOOD, blood -> blood);
+
+    static final TooltipFactory TOOLTIP = DAMAGE_TO_TARGET;
+
     private final EntityReference<Entity> target = new EntityReference<>();
 
     private int ticks = 10;
@@ -71,7 +79,7 @@ public class DisplacementSpell extends AbstractSpell implements HomingSpell, Pro
         entity.setGlowing(false);
         entity.playSound(USounds.SPELL_DISPLACEMENT_TELEPORT, 1, 1);
 
-        float damage = getTraits().get(Trait.BLOOD);
+        float damage = DAMAGE_TO_TARGET.get(getTraits());
         if (damage > 0) {
             entity.damage(source.damageOf(UDamageTypes.EXHAUSTION, source), damage);
         }
@@ -90,6 +98,7 @@ public class DisplacementSpell extends AbstractSpell implements HomingSpell, Pro
 
     @Override
     protected void onDestroyed(Caster<?> caster) {
+        super.onDestroyed(caster);
         caster.getOriginatingCaster().asEntity().setGlowing(false);
         target.ifPresent(caster.asWorld(), e -> e.setGlowing(false));
     }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/FeatherFallSpell.java

@@ -6,6 +6,10 @@ import java.util.stream.Stream;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
 import com.minelittlepony.unicopia.ability.magic.spell.TimedSpell;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.item.FriendshipBraceletItem;
@@ -28,6 +32,25 @@ public class FeatherFallSpell extends AbstractSpell implements TimedSpell {
     private static final float POWERS_RANGE_WEIGHT = 0.3F;
     private static final float MAX_GENEROSITY_FACTOR = 19F;
 
+    private static final SpellAttribute<Integer> DURATION = SpellAttribute.create(SpellAttributeType.DURATION, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.FOCUS, focus -> 10 + (int)(MathHelper.clamp(focus, 0, 160)));
+    private static final SpellAttribute<Float> STRENGTH = SpellAttribute.create(SpellAttributeType.STRENGTH, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.STRENGTH, strength -> MathHelper.clamp(strength, 2, 9));
+    private static final SpellAttribute<Float> RANGE = SpellAttribute.create(SpellAttributeType.RANGE, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.POWER, power -> MathHelper.clamp((power - 10) * POWERS_RANGE_WEIGHT, MIN_RANGE, MAX_RANGE));
+    private static final SpellAttribute<Long> SIMULTANIOUS_TARGETS = SpellAttribute.create(SpellAttributeType.SIMULTANIOUS_TARGETS, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.GENEROSITY, (traits, generosity) -> {
+        return (long)(generosity + traits.get(Trait.FOCUS, MIN_TARGETS, MAX_TARGETS) * 2);
+    });
+    private static final SpellAttribute<Float> COST_PER_INDIVIDUAL = SpellAttribute.create(SpellAttributeType.COST_PER_INDIVIDUAL, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.POWER, (traits, power) -> {
+        return MathHelper.clamp(((Math.max(power, 10) - 10) * POWERS_RANGE_WEIGHT) - ((Math.max(traits.get(Trait.FOCUS), 80) - 80) * FOCUS_RANGE_WEIGHT), 1, 7);
+    });
+    private static final SpellAttribute<Float> TARGET_PREFERENCE = SpellAttribute.create(SpellAttributeType.TARGET_PREFERENCE, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.GENEROSITY, generosity -> {
+        return MathHelper.clamp(generosity, 1, MAX_GENEROSITY_FACTOR) / MAX_GENEROSITY_FACTOR;
+    });
+    private static final SpellAttribute<Float> CASTER_PREFERENCE = SpellAttribute.create(SpellAttributeType.CASTER_PREFERENCE, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.GENEROSITY, (traits, generosity) -> {
+        return 1 - TARGET_PREFERENCE.get(traits);
+    });
+    private static final SpellAttribute<Boolean> NEGATES_FALL_DAMAGE = SpellAttribute.createConditional(SpellAttributeType.NEGATES_FALL_DAMAGE, Trait.GENEROSITY, (generosity) -> generosity > 0.5F);
+
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(DURATION, STRENGTH, RANGE, SIMULTANIOUS_TARGETS, COST_PER_INDIVIDUAL, TARGET_PREFERENCE, CASTER_PREFERENCE, NEGATES_FALL_DAMAGE);
+
     public static final SpellTraits DEFAULT_TRAITS = new SpellTraits.Builder()
             .with(Trait.FOCUS, 80)
             .with(Trait.POWER, 10)
@@ -40,7 +63,7 @@ public class FeatherFallSpell extends AbstractSpell implements TimedSpell {
 
     protected FeatherFallSpell(CustomisedSpellType<?> type) {
         super(type);
-        timer = new Timer(10 + (int)(getTraits().get(Trait.FOCUS, 0, 160)));
+        timer = new Timer(DURATION.get(getTraits()));
     }
 
     @Override
@@ -56,26 +79,22 @@ public class FeatherFallSpell extends AbstractSpell implements TimedSpell {
             return false;
         }
 
-        setDirty();
-
         List<Entity> targets = getTargets(caster).toList();
 
         if (targets.isEmpty()) {
             return true;
         }
 
-        final float strength = 1F / (getTraits().get(Trait.STRENGTH, 2, 9) / targets.size());
-        final float generosity = getTraits().get(Trait.GENEROSITY, 1, MAX_GENEROSITY_FACTOR) / MAX_GENEROSITY_FACTOR;
+        final float strength = 1F / (STRENGTH.get(getTraits()) / targets.size());
+        final float targetPreference = TARGET_PREFERENCE.get(getTraits());
+        final float casterPreference = 1 - targetPreference;
+        final boolean negateFallDamage = NEGATES_FALL_DAMAGE.get(getTraits());
 
         Entity entity = caster.asEntity();
         Vec3d masterVelocity = entity.getVelocity().multiply(0.1);
         targets.forEach(target -> {
             if (target.getVelocity().y < 0) {
-
-                boolean isSelf = caster.isOwnedBy(target) || target == entity;
-                float delta = strength * (isSelf ? (1F - generosity) : generosity);
-
-                if (!isSelf || generosity < 0.5F) {
+                if (negateFallDamage) {
                     target.verticalCollision = true;
                     target.setOnGround(true);
                     target.fallDistance = 0;
@@ -83,6 +102,8 @@ public class FeatherFallSpell extends AbstractSpell implements TimedSpell {
                 if (target instanceof PlayerEntity) {
                     ((PlayerEntity)target).getAbilities().flying = false;
                 }
+
+                float delta = strength * ((caster.isOwnedBy(target) || target == entity) ? casterPreference : targetPreference);
                 target.setVelocity(target.getVelocity().multiply(1, delta, 1));
                 if (situation == Situation.PROJECTILE && target != entity) {
                     target.addVelocity(masterVelocity.x, 0, masterVelocity.z);
@@ -91,35 +112,16 @@ public class FeatherFallSpell extends AbstractSpell implements TimedSpell {
             ParticleUtils.spawnParticles(new MagicParticleEffect(getType().getColor()), target, 7);
         });
 
-        return caster.subtractEnergyCost(timer.getTicksRemaining() % 50 == 0 ? getCostPerEntity() * targets.size() : 0);
-    }
-
-    protected double getCostPerEntity() {
-        float focus = Math.max(getTraits().get(Trait.FOCUS), 80) - 80;
-        float power = Math.max(getTraits().get(Trait.POWER), 10) - 10;
-
-        return MathHelper.clamp((power * POWERS_RANGE_WEIGHT) - (focus * FOCUS_RANGE_WEIGHT), 1, 7);
-    }
-
-    protected double getEffectRange() {
-        float power = getTraits().get(Trait.POWER) - 10;
-
-        return MathHelper.clamp(power * POWERS_RANGE_WEIGHT, MIN_RANGE, MAX_RANGE);
-    }
-
-    protected long getMaxTargets() {
-        long generosity = (long)getTraits().get(Trait.GENEROSITY) * 2L;
-        long focus = (long)getTraits().get(Trait.FOCUS, MIN_TARGETS, MAX_TARGETS) * 2L;
-        return generosity + focus;
+        return caster.subtractEnergyCost(timer.getTicksRemaining() % 50 == 0 ? COST_PER_INDIVIDUAL.get(getTraits()) * targets.size() : 0);
     }
 
     protected Stream<Entity> getTargets(Caster<?> caster) {
-        return Stream.concat(Stream.of(caster.asEntity()), caster.findAllEntitiesInRange(getEffectRange()).sorted((a, b) -> {
+        return Stream.concat(Stream.of(caster.asEntity()), caster.findAllEntitiesInRange(RANGE.get(getTraits())).sorted((a, b) -> {
             return Integer.compare(
                     FriendshipBraceletItem.isComrade(caster, a) ? 1 : 0,
                     FriendshipBraceletItem.isComrade(caster, b) ? 1 : 0
             );
-        }).distinct()).limit(getMaxTargets());
+        }).distinct()).limit(SIMULTANIOUS_TARGETS.get(getTraits()));
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/FireBoltSpell.java

@@ -4,6 +4,10 @@ import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.HomingSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.EntityReference;
@@ -15,6 +19,7 @@ import net.minecraft.item.Items;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.predicate.entity.EntityPredicates;
 import net.minecraft.util.hit.EntityHitResult;
+import net.minecraft.util.math.MathHelper;
 
 public class FireBoltSpell extends AbstractSpell implements HomingSpell,
         ProjectileDelegate.ConfigurationListener, ProjectileDelegate.EntityHitListener {
@@ -31,6 +36,15 @@ public class FireBoltSpell extends AbstractSpell implements HomingSpell,
             .with(Trait.FIRE, 60)
             .build();
 
+    private static final SpellAttribute<Float> VELOCITY = SpellAttribute.create(SpellAttributeType.VELOCITY, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.STRENGTH, strength -> 1.3F + (strength / 11F));
+    private static final SpellAttribute<Integer> PROJECTILE_COUNT = SpellAttribute.create(SpellAttributeType.PROJECTILE_COUNT, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.EARTH, earth -> 11 + (int)earth * 3);
+    private static final SpellAttribute<Boolean> FOLLOWS_TARGET = SpellAttribute.createConditional(SpellAttributeType.FOLLOWS_TARGET, Trait.FOCUS, focus -> focus >= 50);
+    private static final SpellAttribute<Float> FOLLOW_RANGE = SpellAttribute.create(SpellAttributeType.FOLLOW_RANGE, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.FOCUS, focus -> Math.max(0F, focus - 49));
+    private static final SpellAttribute<Float> MAX_EXPLOSION_STRENGTH = SpellAttribute.create(SpellAttributeType.EXPLOSION_STRENGTH, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.FOCUS, focus -> focus >= 50 ? 10F : 1F);
+    private static final SpellAttribute<Float> EXPLOSION_STRENGTH = SpellAttribute.create(SpellAttributeType.EXPLOSION_STRENGTH, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.POWER, (traits, focus) -> MathHelper.clamp(focus / 50, 0, MAX_EXPLOSION_STRENGTH.get(traits)));
+
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(MAX_EXPLOSION_STRENGTH, EXPLOSION_STRENGTH, VELOCITY, PROJECTILE_COUNT, FOLLOWS_TARGET, FOLLOW_RANGE.conditionally(FOLLOWS_TARGET::get));
+
     private final EntityReference<Entity> target = new EntityReference<>();
 
     protected FireBoltSpell(CustomisedSpellType<?> type) {
@@ -44,10 +58,12 @@ public class FireBoltSpell extends AbstractSpell implements HomingSpell,
 
     @Override
     public boolean tick(Caster<?> caster, Situation situation) {
+        boolean followTarget = FOLLOWS_TARGET.get(getTraits());
+        float followRage = FOLLOW_RANGE.get(getTraits());
         if (situation == Situation.PROJECTILE) {
-            if (caster instanceof MagicProjectileEntity projectile && getTraits().get(Trait.FOCUS) >= 50) {
+            if (caster instanceof MagicProjectileEntity projectile && followTarget) {
                 caster.findAllEntitiesInRange(
-                    getTraits().get(Trait.FOCUS) - 49,
+                        followRage,
                     EntityPredicates.VALID_LIVING_ENTITY.and(TargetSelecter.validTarget(this, caster))
                 ).findFirst().ifPresent(target -> projectile.setHomingTarget(target));
             }
@@ -55,9 +71,9 @@ public class FireBoltSpell extends AbstractSpell implements HomingSpell,
             return true;
         }
 
-        if (getTraits().get(Trait.FOCUS) >= 50 && target.getOrEmpty(caster.asWorld()).isEmpty()) {
+        if (followTarget && target.getOrEmpty(caster.asWorld()).isEmpty()) {
             target.set(caster.findAllEntitiesInRange(
-                getTraits().get(Trait.FOCUS) - 49,
+                    followRage,
                 EntityPredicates.VALID_LIVING_ENTITY.and(TargetSelecter.validTarget(this, caster))
             ).findFirst().orElse(null));
         }
@@ -75,18 +91,18 @@ public class FireBoltSpell extends AbstractSpell implements HomingSpell,
     @Override
     public void configureProjectile(MagicProjectileEntity projectile, Caster<?> caster) {
         projectile.setItem(Items.FIRE_CHARGE.getDefaultStack());
-        projectile.addThrowDamage(getTraits().get(Trait.POWER, 0, getTraits().get(Trait.FOCUS) >= 50 ? 500 : 50) / 10F);
+        projectile.addThrowDamage(EXPLOSION_STRENGTH.get(getTraits()));
         projectile.setFireTicks(900000);
-        projectile.setVelocity(projectile.getVelocity().multiply(1.3 + getTraits().get(Trait.STRENGTH) / 11F));
+        projectile.setVelocity(projectile.getVelocity().multiply(VELOCITY.get(getTraits())));
     }
 
     protected int getNumberOfBalls(Caster<?> caster) {
-        return 1 + caster.asWorld().random.nextInt(3) + (int)getTraits().get(Trait.EARTH) * 3;
+        return PROJECTILE_COUNT.get(getTraits()) + caster.asWorld().random.nextInt(3);
     }
 
     @Override
     public boolean setTarget(Entity target) {
-        if (getTraits().get(Trait.FOCUS) >= 50) {
+        if (FOLLOWS_TARGET.get(getTraits())) {
             this.target.set(target);
             return true;
         }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/FireSpell.java

@@ -67,14 +67,14 @@ public class FireSpell extends AbstractAreaEffectSpell implements ProjectileDele
             generateParticles(source);
         }
 
-        return new Sphere(false, Math.max(0, 4 + getTraits().get(Trait.POWER))).translate(source.getOrigin()).getBlockPositions().reduce(false,
+        return new Sphere(false, RANGE.get(getTraits())).translate(source.getOrigin()).getBlockPositions().reduce(false,
                 (r, i) -> source.canModifyAt(i) && applyBlocks(source.asWorld(), i),
                 (a, b) -> a || b)
                 || applyEntities(source, source.getOriginVector());
     }
 
     protected void generateParticles(Caster<?> source) {
-        source.spawnParticles(new Sphere(false, Math.max(0, 4 + getTraits().get(Trait.POWER))), (int)(1 + source.getLevel().getScaled(8)) * 6, pos -> {
+        source.spawnParticles(new Sphere(false, RANGE.get(getTraits())), (int)(1 + source.getLevel().getScaled(8)) * 6, pos -> {
             source.addParticle(ParticleTypes.LARGE_SMOKE, pos, Vec3d.ZERO);
         });
     }
@@ -121,8 +121,12 @@ public class FireSpell extends AbstractAreaEffectSpell implements ProjectileDele
         return false;
     }
 
+    protected float getEntityEffectRange() {
+        return Math.max(0, RANGE.get(getTraits()) - 1);
+    }
+
     protected boolean applyEntities(Caster<?> source, Vec3d pos) {
-        return source.findAllEntitiesInRange(Math.max(0, 3 + getTraits().get(Trait.POWER)), e -> {
+        return source.findAllEntitiesInRange(getEntityEffectRange(), e -> {
             LivingEntity master = source.getMaster();
             return (!(e.equals(source.asEntity()) || e.equals(master)) ||
                     (master instanceof PlayerEntity && !EquinePredicates.PLAYER_UNICORN.test(master))) && !(e instanceof ItemEntity)

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/HydrophobicSpell.java

@@ -8,6 +8,8 @@ import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.CastingMethod;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
 import com.minelittlepony.unicopia.ability.magic.spell.Spell;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.CastOn;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.advancement.UCriteria;
@@ -35,6 +37,8 @@ public class HydrophobicSpell extends AbstractSpell {
             .with(Trait.KNOWLEDGE, 1)
             .build();
 
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(ShieldSpell.CAST_ON, ShieldSpell.RANGE);
+
     private final TagKey<Fluid> affectedFluid;
 
     private final Set<Entry> storedFluidPositions = new HashSet<>();
@@ -46,7 +50,7 @@ public class HydrophobicSpell extends AbstractSpell {
 
     @Override
     public Spell prepareForCast(Caster<?> caster, CastingMethod method) {
-        if ((method == CastingMethod.DIRECT || method == CastingMethod.STAFF) && getTraits().get(Trait.GENEROSITY) > 0) {
+        if ((method == CastingMethod.DIRECT || method == CastingMethod.STAFF) && ShieldSpell.CAST_ON.get(getTraits()) == CastOn.LOCATION) {
             return toPlaceable();
         }
         return this;
@@ -92,8 +96,7 @@ public class HydrophobicSpell extends AbstractSpell {
             }
 
             double range = getRange(source);
-            var entry = Ether.get(source.asWorld()).getOrCreate(this, source);
-            entry.radius =  (float)range;
+            Ether.get(source.asWorld()).getOrCreate(this, source).setRadius((float)range);
 
             source.spawnParticles(new Sphere(true, range), 10, pos -> {
                 BlockPos bp = BlockPos.ofFloored(pos);
@@ -116,7 +119,7 @@ public class HydrophobicSpell extends AbstractSpell {
 
     @Override
     protected void onDestroyed(Caster<?> caster) {
-        Ether.get(caster.asWorld()).remove(this, caster);
+        super.onDestroyed(caster);
         storedFluidPositions.removeIf(entry -> {
             if (caster.canModifyAt(entry.pos())) {
                 entry.restore(caster.asWorld());
@@ -142,7 +145,7 @@ public class HydrophobicSpell extends AbstractSpell {
      */
     public double getRange(Caster<?> source) {
         float multiplier = 1;
-        float min = (source instanceof Pony ? 4 : 6) + getTraits().get(Trait.POWER);
+        float min = (source instanceof Pony ? 0 : 2) + ShieldSpell.RANGE.get(getTraits());
         boolean isLimitedRange = source instanceof Pony || source instanceof MagicProjectileEntity;
         double range = (min + (source.getLevel().getScaled(isLimitedRange ? 4 : 40) * (isLimitedRange ? 2 : 10))) / multiplier;
         return range;
@@ -175,19 +178,21 @@ public class HydrophobicSpell extends AbstractSpell {
     }
 
     public boolean blocksFlow(Ether.Entry<?> entry, Vec3d center, BlockPos pos, FluidState fluid) {
-        return fluid.isIn(affectedFluid) && pos.isWithinDistance(center, (double)entry.radius + 1);
+        return fluid.isIn(affectedFluid) && pos.isWithinDistance(center, (double)entry.getRadius() + 1);
     }
 
     public static boolean blocksFluidFlow(BlockView world, BlockPos pos, FluidState state) {
-        if (world instanceof ServerWorld sw) {
-            return Ether.get(sw).anyMatch(SpellType.HYDROPHOBIC, entry -> {
-                var spell = entry.getSpell();
-                var target = entry.entity.getTarget().orElse(null);
-                return spell != null && target != null && spell.blocksFlow(entry, target.pos(), pos, state);
-            });
+        if (!(world instanceof ServerWorld sw)) {
+            return false;
         }
 
-        return false;
-
+        return Ether.get(sw).anyMatch(SpellType.HYDROPHOBIC, entry -> {
+            var target = entry.entity.getTarget().orElse(null);
+            if (target == null || !pos.isWithinDistance(target.pos(), entry.getRadius() + 1)) {
+                return false;
+            }
+            var spell = entry.getSpell();
+            return spell != null && target != null && spell.blocksFlow(entry, target.pos(), pos, state);
+        });
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/IceSpell.java

@@ -5,6 +5,10 @@ import java.util.List;
 import com.minelittlepony.unicopia.Owned;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.block.state.StateMaps;
@@ -12,7 +16,6 @@ import com.minelittlepony.unicopia.block.state.StatePredicate;
 import com.minelittlepony.unicopia.particle.ParticleUtils;
 import com.minelittlepony.unicopia.util.PosHelper;
 import com.minelittlepony.unicopia.util.VecHelper;
-import com.minelittlepony.unicopia.util.shape.Shape;
 import com.minelittlepony.unicopia.util.shape.Sphere;
 
 import net.minecraft.block.*;
@@ -33,8 +36,9 @@ public class IceSpell extends AbstractSpell {
             .with(Trait.ICE, 15)
             .build();
 
-    private static final int RADIUS = 3;
-    private static final Shape OUTER_RANGE = new Sphere(false, RADIUS);
+    private static final SpellAttribute<Float> RANGE = SpellAttribute.create(SpellAttributeType.RANGE, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.POWER, power -> Math.max(0, 3 + power));
+
+    static final TooltipFactory TOOLTIP = RANGE;
 
     protected IceSpell(CustomisedSpellType<?> type) {
         super(type);
@@ -43,11 +47,12 @@ public class IceSpell extends AbstractSpell {
     @Override
     public boolean tick(Caster<?> source, Situation situation) {
         boolean submerged = source.asEntity().isSubmergedInWater() || source.asEntity().isSubmergedIn(FluidTags.LAVA);
+        float radius = RANGE.get(getTraits());
 
-        long blocksAffected = OUTER_RANGE.translate(source.getOrigin()).getBlockPositions().filter(i -> {
+        long blocksAffected = new Sphere(false, radius).translate(source.getOrigin()).getBlockPositions().filter(i -> {
             if (source.canModifyAt(i) && applyBlockSingle(source.asEntity(), source.asWorld(), i, situation)) {
 
-                if (submerged & source.getOrigin().isWithinDistance(i, RADIUS - 1)) {
+                if (submerged & source.getOrigin().isWithinDistance(i, RANGE.get(getTraits()) - 1)) {
                     BlockState state = source.asWorld().getBlockState(i);
                     if (state.isIn(BlockTags.ICE) || state.isOf(Blocks.OBSIDIAN)) {
                         source.asWorld().setBlockState(i, Blocks.AIR.getDefaultState(), Block.NOTIFY_NEIGHBORS);

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/LightSpell.java

@@ -7,6 +7,10 @@ import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.CastingMethod;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
 import com.minelittlepony.unicopia.ability.magic.spell.TimedSpell;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.EntityReference;
@@ -20,6 +24,7 @@ import com.minelittlepony.unicopia.util.VecHelper;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.nbt.NbtElement;
 import net.minecraft.nbt.NbtList;
+import net.minecraft.util.math.MathHelper;
 
 public class LightSpell extends AbstractSpell implements TimedSpell, ProjectileDelegate.HitListener {
     public static final SpellTraits DEFAULT_TRAITS = new SpellTraits.Builder()
@@ -29,13 +34,17 @@ public class LightSpell extends AbstractSpell implements TimedSpell, ProjectileD
             .with(Trait.ORDER, 25)
             .build();
 
+    private static final SpellAttribute<Integer> ORB_COUNT = SpellAttribute.create(SpellAttributeType.ORB_COUNT, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.LIFE, life -> 2 + (int)(MathHelper.clamp(life, 10, 20) / 10F));
+
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(TIME, ORB_COUNT);
+
     private final Timer timer;
 
     private final List<EntityReference<FairyEntity>> lights = new ArrayList<>();
 
     protected LightSpell(CustomisedSpellType<?> type) {
         super(type);
-        timer = new Timer((120 + (int)(getTraits().get(Trait.FOCUS, 0, 160) * 19)) * 20);
+        timer = new Timer(TIME.get(getTraits()));
     }
 
     @Override
@@ -56,11 +65,9 @@ public class LightSpell extends AbstractSpell implements TimedSpell, ProjectileD
             return false;
         }
 
-        setDirty();
-
         if (!caster.isClient()) {
             if (lights.isEmpty()) {
-                int size = 2 + caster.asWorld().random.nextInt(2) + (int)(getTraits().get(Trait.LIFE, 10, 20) - 10)/10;
+                int size = caster.asWorld().random.nextInt(2) + ORB_COUNT.get(getTraits());
                 while (lights.size() < size) {
                     lights.add(new EntityReference<>());
                 }
@@ -76,7 +83,6 @@ public class LightSpell extends AbstractSpell implements TimedSpell, ProjectileD
                     entity.getWorld().spawnEntity(entity);
 
                     ref.set(entity);
-                    setDirty();
                 }
             });
         }
@@ -91,6 +97,7 @@ public class LightSpell extends AbstractSpell implements TimedSpell, ProjectileD
 
     @Override
     protected void onDestroyed(Caster<?> caster) {
+        super.onDestroyed(caster);
         if (caster.isClient()) {
             return;
         }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/MimicSpell.java

@@ -2,17 +2,20 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.*;
-import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
+
 import net.minecraft.entity.Entity;
 import net.minecraft.nbt.NbtCompound;
 
 public class MimicSpell extends AbstractDisguiseSpell implements HomingSpell, TimedSpell {
 
+    static final TooltipFactory TOOLTIP = TimedSpell.TIME;
+
     private final Timer timer;
 
     protected MimicSpell(CustomisedSpellType<?> type) {
         super(type);
-        timer = new Timer((120 + (int)(getTraits().get(Trait.FOCUS, 0, 160) * 19)) * 20);
+        timer = new Timer(TIME.get(getTraits()));
     }
 
     @Override
@@ -28,8 +31,6 @@ public class MimicSpell extends AbstractDisguiseSpell implements HomingSpell, Ti
             return false;
         }
 
-        setDirty();
-
         return super.tick(caster, situation);
     }
 

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/MindSwapSpell.java

@@ -60,8 +60,8 @@ public class MindSwapSpell extends MimicSpell implements ProjectileDelegate.Enti
                 LivingEntity master = caster.getMaster();
                 Caster<?> other = Caster.of(e).get();
 
-                other.getSpellSlot().removeIf(SpellType.MIMIC, true);
-                caster.getSpellSlot().removeIf(getType(), true);
+                other.getSpellSlot().removeIf(SpellType.MIMIC);
+                caster.getSpellSlot().removeIf(getType());
 
                 if (!isValidTarget(master) || !isValidTarget(e)) {
                     master.damage(caster.asWorld().getDamageSources().magic(), Float.MAX_VALUE);
@@ -135,7 +135,6 @@ public class MindSwapSpell extends MimicSpell implements ProjectileDelegate.Enti
                     caster.playSound(USounds.SPELL_MINDSWAP_SWAP, 1);
                 });
                 initialized = true;
-                setDirty();
             }
 
             if (counterpart.isSet()) {
@@ -143,13 +142,12 @@ public class MindSwapSpell extends MimicSpell implements ProjectileDelegate.Enti
 
                 if (other == null) {
                     caster.getOriginatingCaster().asEntity().damage(caster.asWorld().getDamageSources().magic(), Float.MAX_VALUE);
-                    setDead();
+                    destroy(caster);
                     return false;
                 }
 
                 if (!Caster.of(other).get().getSpellSlot().contains(SpellType.MIMIC)) {
-                    onDestroyed(caster);
-                    setDead();
+                    destroy(caster);
                     return false;
                 }
             }
@@ -158,8 +156,7 @@ public class MindSwapSpell extends MimicSpell implements ProjectileDelegate.Enti
                 counterpart.ifPresent(caster.asWorld(), e -> {
                     e.damage(e.getDamageSources().magic(), Float.MAX_VALUE);
                 });
-                onDestroyed(caster);
-                setDead();
+                destroy(caster);
                 return false;
             }
         }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/NecromancySpell.java

@@ -8,6 +8,10 @@ import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.AbstractAreaEffectSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.Creature;
 import com.minelittlepony.unicopia.entity.EntityReference;
@@ -79,6 +83,9 @@ public class NecromancySpell extends AbstractAreaEffectSpell implements Projecti
         return e -> e.getType() == type;
     }
 
+    static final SpellAttribute<Integer> WAVE_SIZE = SpellAttribute.create(SpellAttributeType.WAVE_SIZE, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.CHAOS, chaos -> 10 + (int)MathHelper.clamp(chaos, 0, 10));
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(RANGE, WAVE_SIZE);
+
     private final List<EntityReference<LivingEntity>> summonedEntities = new ArrayList<>();
 
     private int spawnCountdown;
@@ -90,7 +97,7 @@ public class NecromancySpell extends AbstractAreaEffectSpell implements Projecti
     @Override
     public boolean tick(Caster<?> source, Situation situation) {
 
-        float radius = 4 + source.getLevel().getScaled(4) * 4 + getTraits().get(Trait.POWER);
+        float radius = source.getLevel().getScaled(4) * 4 + RANGE.get(getTraits());
 
         if (radius <= 0) {
             return false;
@@ -122,15 +129,16 @@ public class NecromancySpell extends AbstractAreaEffectSpell implements Projecti
             return true;
         }).isEmpty());
 
-        float additional = source.asWorld().getLocalDifficulty(source.getOrigin()).getLocalDifficulty() + getTraits().get(Trait.CHAOS, 0, 10);
-
-        setDirty();
         if (--spawnCountdown > 0 && !summonedEntities.isEmpty()) {
             return true;
         }
+        // TODO: refactory speed attribute
+        // TODO: weather resistant attribute
         spawnCountdown = 1200 + source.asWorld().random.nextInt(rainy ? 2000 : 1000);
 
-        if (summonedEntities.size() > 10 + additional) {
+        float additional = source.asWorld().getLocalDifficulty(source.getOrigin()).getLocalDifficulty() + WAVE_SIZE.get(getTraits());
+
+        if (summonedEntities.size() > additional) {
             return true;
         }
 
@@ -153,6 +161,7 @@ public class NecromancySpell extends AbstractAreaEffectSpell implements Projecti
 
     @Override
     protected void onDestroyed(Caster<?> caster) {
+        super.onDestroyed(caster);
         if (caster.isClient()) {
             return;
         }
@@ -205,7 +214,6 @@ public class NecromancySpell extends AbstractAreaEffectSpell implements Projecti
 
         source.asWorld().spawnEntity(minion);
         summonedEntities.add(new EntityReference<>(minion));
-        setDirty();
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/PortalSpell.java

@@ -1,19 +1,21 @@
 package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
-import java.util.Optional;
 import java.util.UUID;
 
 import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.USounds;
-import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.*;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.EntityReference;
 import com.minelittlepony.unicopia.entity.Living;
-import com.minelittlepony.unicopia.entity.mob.CastSpellEntity;
+import com.minelittlepony.unicopia.entity.player.Pony;
+import com.minelittlepony.unicopia.network.Channel;
+import com.minelittlepony.unicopia.network.MsgCasterLookRequest;
+import com.minelittlepony.unicopia.network.track.DataTracker;
+import com.minelittlepony.unicopia.network.track.TrackableDataType;
 import com.minelittlepony.unicopia.particle.*;
 import com.minelittlepony.unicopia.server.world.Ether;
 import com.minelittlepony.unicopia.util.shape.*;
@@ -21,17 +23,18 @@ import com.minelittlepony.unicopia.util.shape.*;
 import net.minecraft.block.Block;
 import net.minecraft.block.Blocks;
 import net.minecraft.entity.Entity;
-import net.minecraft.entity.LivingEntity;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.network.packet.s2c.play.PositionFlag;
 import net.minecraft.particle.ParticleTypes;
+import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.server.world.ServerWorld;
+import net.minecraft.util.Util;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.world.WorldEvents;
 
-public class PortalSpell extends AbstractSpell implements PlaceableSpell.PlacementDelegate, OrientedSpell {
+public class PortalSpell extends AbstractSpell implements PlacementControlSpell.PlacementDelegate, OrientedSpell {
     public static final SpellTraits DEFAULT_TRAITS = new SpellTraits.Builder()
             .with(Trait.LIFE, 10)
             .with(Trait.KNOWLEDGE, 1)
@@ -40,15 +43,13 @@ public class PortalSpell extends AbstractSpell implements PlaceableSpell.Placeme
     private static final Shape PARTICLE_AREA = new Sphere(true, 2, 1, 1, 0);
 
     @Nullable
-    private UUID targetPortalId;
-    private float targetPortalPitch;
-    private float targetPortalYaw;
+    private final DataTracker.Entry<UUID> targetPortalId = dataTracker.startTracking(TrackableDataType.UUID, Util.NIL_UUID);
+    private final DataTracker.Entry<Float> targetPortalPitch = dataTracker.startTracking(TrackableDataType.FLOAT, 0F);
+    private final DataTracker.Entry<Float> targetPortalYaw = dataTracker.startTracking(TrackableDataType.FLOAT, 0F);
     private final EntityReference<Entity> teleportationTarget = new EntityReference<>();
 
-    private boolean publishedPosition;
-
-    private float pitch;
-    private float yaw;
+    private final DataTracker.Entry<Float> pitch = dataTracker.startTracking(TrackableDataType.FLOAT, 0F);
+    private final DataTracker.Entry<Float> yaw = dataTracker.startTracking(TrackableDataType.FLOAT, 0F);
 
     private Shape particleArea = PARTICLE_AREA;
 
@@ -56,45 +57,56 @@ public class PortalSpell extends AbstractSpell implements PlaceableSpell.Placeme
         super(type);
     }
 
-    public boolean isLinked() {
-        return teleportationTarget.isSet();
-    }
-
-    public Optional<EntityReference.EntityValues<Entity>> getTarget() {
-        return teleportationTarget.getTarget();
+    public EntityReference<Entity> getDestinationReference() {
+        return teleportationTarget;
     }
 
     public float getPitch() {
-        return pitch;
+        return pitch.get();
     }
 
     public float getYaw() {
-        return yaw;
+        return yaw.get();
     }
 
     public float getTargetPitch() {
-        return targetPortalPitch;
+        return targetPortalPitch.get();
     }
 
     public float getTargetYaw() {
-        return targetPortalYaw;
+        return targetPortalYaw.get();
     }
 
     public float getYawDifference() {
-        return MathHelper.wrapDegrees(180 + targetPortalYaw - yaw);
+        return MathHelper.wrapDegrees(180 + getTargetYaw() - getYaw());
     }
 
     @SuppressWarnings("unchecked")
-    private Optional<Ether.Entry<PortalSpell>> getDestination(Caster<?> source) {
-        return getTarget().map(target -> Ether.get(source.asWorld()).get((SpellType<PortalSpell>)getType(), target, targetPortalId));
+    private Ether.Entry<PortalSpell> getDestination(Caster<?> source) {
+        return Util.NIL_UUID.equals(targetPortalId.get()) ? null : getDestinationReference()
+                .getTarget()
+                .map(target -> Ether.get(source.asWorld()).get((SpellType<PortalSpell>)getType(), target.uuid(), targetPortalId.get()))
+                .filter(destination -> destination.isClaimedBy(getUuid()))
+                .orElse(null);
     }
 
     @Override
     public boolean apply(Caster<?> caster) {
-        setOrientation(caster.asEntity().getPitch(), caster.asEntity().getYaw());
         return toPlaceable().apply(caster);
     }
 
+    protected void setDestination(@Nullable Ether.Entry<?> destination) {
+        if (destination == null) {
+            teleportationTarget.set(null);
+            targetPortalId.set(Util.NIL_UUID);
+        } else {
+            teleportationTarget.copyFrom(destination.entity);
+            targetPortalId.set(destination.getSpellId());
+            targetPortalPitch.set(destination.getPitch());
+            targetPortalYaw.set(destination.getYaw());
+        }
+    }
+
     @Override
     public boolean tick(Caster<?> source, Situation situation) {
         if (situation == Situation.GROUND) {
@@ -103,53 +115,56 @@ public class PortalSpell extends AbstractSpell implements PlaceableSpell.Placeme
                     source.addParticle(ParticleTypes.ELECTRIC_SPARK, pos, Vec3d.ZERO);
                 });
             } else {
-                teleportationTarget.getTarget().ifPresent(target -> {
-                    if (Ether.get(source.asWorld()).get(getType(), target, targetPortalId) == null) {
-                        Unicopia.LOGGER.debug("Lost sibling, breaking connection to " + target.uuid());
-                        teleportationTarget.set(null);
-                        setDirty();
-                        source.asWorld().syncWorldEvent(WorldEvents.BLOCK_BROKEN, source.getOrigin(), Block.getRawIdFromState(Blocks.GLASS.getDefaultState()));
-                    }
-                });
+                var ownEntry = Ether.get(source.asWorld()).get(this, source);
+                synchronized (ownEntry) {
+                    var targetEntry = getDestination(source);
 
-                getDestination(source).ifPresentOrElse(
-                        entry -> tickWithTargetLink(source, entry),
-                        () -> findLink(source)
-                );
+                    if (targetEntry == null) {
+                        if (teleportationTarget.isSet()) {
+                            setDestination(null);
+                            source.asWorld().syncWorldEvent(WorldEvents.BLOCK_BROKEN, source.getOrigin(), Block.getRawIdFromState(Blocks.GLASS.getDefaultState()));
+                        } else {
+                            Ether.get(source.asWorld()).anyMatch(getType(), entry -> {
+                                if (entry.isAlive() && !entry.hasClaimant() && !entry.entityMatches(source.asEntity().getUuid())) {
+                                    entry.claim(getUuid());
+                                    ownEntry.claim(entry.getSpellId());
+                                    synchronized (entry) {
+                                        if (entry.getSpell() instanceof PortalSpell portal) {
+                                            portal.setDestination(ownEntry);
+                                        }
+                                    }
+                                    setDestination(entry);
+                                }
+                                return false;
+                            });
+                        }
+                    } else {
+                        tickActive(source, targetEntry);
+                    }
+                }
             }
 
-            Ether ether = Ether.get(source.asWorld());
-            var entry = ether.getOrCreate(this, source);
-            entry.pitch = pitch;
-            entry.yaw = yaw;
-            ether.markDirty();
+            var entry = Ether.get(source.asWorld()).getOrCreate(this, source);
+            entry.setPitch(pitch.get());
+            entry.setYaw(yaw.get());
         }
 
         return !isDead();
     }
 
-    private void tickWithTargetLink(Caster<?> source, Ether.Entry<?> destination) {
-
-        if (!MathHelper.approximatelyEquals(targetPortalPitch, destination.pitch)) {
-            targetPortalPitch = destination.pitch;
-            setDirty();
-        }
-        if (!MathHelper.approximatelyEquals(targetPortalYaw, destination.yaw)) {
-            targetPortalYaw = destination.yaw;
-            setDirty();
-        }
-
+    private void tickActive(Caster<?> source, Ether.Entry<?> destination) {
         destination.entity.getTarget().ifPresent(target -> {
             source.findAllEntitiesInRange(1).forEach(entity -> {
                 if (!entity.hasPortalCooldown()) {
 
-                    float approachYaw = Math.abs(MathHelper.wrapDegrees(entity.getYaw() - this.yaw));
+                    float approachYaw = Math.abs(MathHelper.wrapDegrees(entity.getYaw() - this.yaw.get()));
                     if (approachYaw > 80) {
                         return;
                     }
 
-                    Vec3d offset = entity.getPos().subtract(source.getOriginVector());
-                    float yawDifference = pitch < 15 ? getYawDifference() : 0;
+                    Vec3d offset = entity.getPos().subtract(source.asEntity().getPos())
+                            .add(new Vec3d(0, 0, -0.7F).rotateY(-getTargetYaw() * MathHelper.RADIANS_PER_DEGREE));
+                    float yawDifference = getYawDifference();
                     Vec3d dest = target.pos().add(offset.rotateY(yawDifference * MathHelper.RADIANS_PER_DEGREE)).add(0, 0.1, 0);
 
                     if (entity.getWorld().isTopSolid(BlockPos.ofFloored(dest).up(), entity)) {
@@ -165,7 +180,6 @@ public class PortalSpell extends AbstractSpell implements PlaceableSpell.Placeme
                     entity.getWorld().playSoundFromEntity(null, entity, USounds.ENTITY_PLAYER_UNICORN_TELEPORT, entity.getSoundCategory(), 1, 1);
                     entity.teleport((ServerWorld)entity.getWorld(), dest.x, dest.y, dest.z, PositionFlag.VALUES, yaw, entity.getPitch());
                     entity.getWorld().playSoundFromEntity(null, entity, USounds.ENTITY_PLAYER_UNICORN_TELEPORT, entity.getSoundCategory(), 1, 1);
-                    setDirty();
 
                     Living.updateVelocity(entity);
 
@@ -179,73 +193,61 @@ public class PortalSpell extends AbstractSpell implements PlaceableSpell.Placeme
         });
     }
 
-    private void findLink(Caster<?> source) {
-        if (source.isClient()) {
-            return;
-        }
-
-        Ether.get(source.asWorld()).anyMatch(getType(), entry -> {
-            if (!entry.entity.referenceEquals(source.asEntity()) && entry.claim()) {
-                teleportationTarget.copyFrom(entry.entity);
-                targetPortalId = entry.getSpellId();
-                setDirty();
-            }
-            return false;
-        });
-    }
-
     @Override
-    public void setOrientation(float pitch, float yaw) {
-        this.pitch = pitch;
-        this.yaw = yaw;
+    public void setOrientation(Caster<?> caster, float pitch, float yaw) {
+        this.pitch.set(90 - pitch);
+        this.yaw.set(-yaw);
         particleArea = PARTICLE_AREA.rotate(
-            pitch * MathHelper.RADIANS_PER_DEGREE,
-            (180 - yaw) * MathHelper.RADIANS_PER_DEGREE
+            this.pitch.get() * MathHelper.RADIANS_PER_DEGREE,
+            (180 - this.yaw.get()) * MathHelper.RADIANS_PER_DEGREE
         );
-        setDirty();
     }
 
     @Override
-    public void onPlaced(Caster<?> source, PlaceableSpell parent, CastSpellEntity entity) {
-        LivingEntity caster = source.getMaster();
+    public void onPlaced(Caster<?> source, PlacementControlSpell parent) {
+        Entity caster = source.asEntity();
         Vec3d targetPos = caster.getRotationVector().multiply(3).add(caster.getEyePos());
-        parent.setOrientation(pitch, yaw);
-        entity.setPos(targetPos.x, Math.abs(pitch) > 15 ? targetPos.y : caster.getPos().y, targetPos.z);
+        parent.setOrientation(source, -90 - source.asEntity().getPitch(), -source.asEntity().getYaw());
+        parent.setPosition(new Vec3d(targetPos.x, caster.getPos().y, targetPos.z));
+        if (source instanceof Pony pony) {
+            Channel.SERVER_REQUEST_PLAYER_LOOK.sendToPlayer(new MsgCasterLookRequest(parent.getUuid()), (ServerPlayerEntity)pony.asEntity());
+        }
     }
 
     @Override
     protected void onDestroyed(Caster<?> caster) {
-        Ether.get(caster.asWorld()).remove(getType(), caster);
-        getDestination(caster).ifPresent(Ether.Entry::release);
+        super.onDestroyed(caster);
+        if (!caster.isClient()) {
+            var destination = getDestination(caster);
+            if (destination != null) {
+                destination.release(getUuid());
+            }
+        }
     }
 
     @Override
     public void toNBT(NbtCompound compound) {
         super.toNBT(compound);
-        if (targetPortalId != null) {
-            compound.putUuid("targetPortalId", targetPortalId);
-        }
-        compound.putBoolean("publishedPosition", publishedPosition);
+        compound.putUuid("targetPortalId", targetPortalId.get());
         compound.put("teleportationTarget", teleportationTarget.toNBT());
-        compound.putFloat("pitch", pitch);
-        compound.putFloat("yaw", yaw);
-        compound.putFloat("targetPortalPitch", targetPortalPitch);
-        compound.putFloat("targetPortalYaw", targetPortalYaw);
+        compound.putFloat("pitch", getPitch());
+        compound.putFloat("yaw", getYaw());
+        compound.putFloat("targetPortalPitch", getTargetPitch());
+        compound.putFloat("targetPortalYaw", getTargetYaw());
     }
 
     @Override
     public void fromNBT(NbtCompound compound) {
         super.fromNBT(compound);
-        targetPortalId = compound.containsUuid("targetPortalId") ? compound.getUuid("targetPortalId") : null;
-        publishedPosition = compound.getBoolean("publishedPosition");
+        targetPortalId.set(compound.containsUuid("targetPortalId") ? compound.getUuid("targetPortalId") : Util.NIL_UUID);
         teleportationTarget.fromNBT(compound.getCompound("teleportationTarget"));
-        pitch = compound.getFloat("pitch");
-        yaw = compound.getFloat("yaw");
-        targetPortalPitch = compound.getFloat("targetPortalPitch");
-        targetPortalYaw = compound.getFloat("targetPortalYaw");
+        pitch.set(compound.getFloat("pitch"));
+        yaw.set(compound.getFloat("yaw"));
+        targetPortalPitch.set(compound.getFloat("targetPortalPitch"));
+        targetPortalYaw.set(compound.getFloat("targetPortalYaw"));
         particleArea = PARTICLE_AREA.rotate(
-            pitch * MathHelper.RADIANS_PER_DEGREE,
-            (180 - yaw) * MathHelper.RADIANS_PER_DEGREE
+            pitch.get() * MathHelper.RADIANS_PER_DEGREE,
+            (180 - yaw.get()) * MathHelper.RADIANS_PER_DEGREE
         );
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/ScorchSpell.java

@@ -36,7 +36,7 @@ public class ScorchSpell extends FireSpell implements ProjectileDelegate.Configu
         BlockPos pos = PosHelper.findSolidGroundAt(source.asWorld(), source.getOrigin(), source.getPhysics().getGravitySignum());
 
         if (source.canModifyAt(pos) && StateMaps.FIRE_AFFECTED.convert(source.asWorld(), pos)) {
-            source.spawnParticles(new Sphere(false, Math.max(1, getTraits().get(Trait.POWER))), 5, p -> {
+            source.spawnParticles(new Sphere(false, RANGE.get(getTraits())), 5, p -> {
                 source.addParticle(ParticleTypes.SMOKE, PosHelper.offset(p, pos), Vec3d.ZERO);
             });
         }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/ShieldSpell.java

@@ -9,6 +9,11 @@ import com.minelittlepony.unicopia.ability.magic.Caster;
 import com.minelittlepony.unicopia.ability.magic.spell.CastingMethod;
 import com.minelittlepony.unicopia.ability.magic.spell.Situation;
 import com.minelittlepony.unicopia.ability.magic.spell.Spell;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.AttributeFormat;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.CastOn;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttribute;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.SpellAttributeType;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.client.minelittlepony.MineLPDelegate;
@@ -17,6 +22,7 @@ import com.minelittlepony.unicopia.particle.LightningBoltParticleEffect;
 import com.minelittlepony.unicopia.particle.MagicParticleEffect;
 import com.minelittlepony.unicopia.particle.ParticleUtils;
 import com.minelittlepony.unicopia.projectile.ProjectileUtil;
+import com.minelittlepony.unicopia.server.world.Ether;
 import com.minelittlepony.unicopia.util.ColorHelper;
 import com.minelittlepony.unicopia.util.Lerp;
 import com.minelittlepony.unicopia.util.shape.Sphere;
@@ -24,6 +30,7 @@ import com.minelittlepony.unicopia.util.shape.Sphere;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EyeOfEnderEntity;
 import net.minecraft.entity.FallingBlockEntity;
+import net.minecraft.entity.ItemEntity;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.TntEntity;
 import net.minecraft.entity.Entity.RemovalReason;
@@ -44,6 +51,19 @@ public class ShieldSpell extends AbstractSpell {
             .with(Trait.AIR, 9)
             .build();
 
+    static final SpellAttribute<Float> RANGE = SpellAttribute.create(SpellAttributeType.RANGE, AttributeFormat.REGULAR, AttributeFormat.PERCENTAGE, Trait.POWER, power -> Math.max(0, 4 + power));
+    protected static final SpellAttribute<CastOn> CAST_ON = SpellAttribute.createEnumerated(SpellAttributeType.CAST_ON, Trait.GENEROSITY, generosity -> generosity > 0 ? CastOn.LOCATION : CastOn.SELF);
+
+    static final SpellAttribute<Boolean> TARGET_ITEMS = SpellAttribute.createConditional(SpellAttributeType.PERMIT_ITEMS, Trait.KNOWLEDGE, knowledge -> knowledge > 10);
+    static final SpellAttribute<Boolean> PERMIT_PASSIVE = SpellAttribute.createConditional(SpellAttributeType.PERMIT_PASSIVE, Trait.LIFE, l -> l > 0);
+    static final SpellAttribute<Boolean> PERMIT_HOSTILE = SpellAttribute.createConditional(SpellAttributeType.PERMIT_HOSTILE, Trait.BLOOD, l -> l > 0);
+    static final SpellAttribute<Boolean> PERMIT_PLAYER = SpellAttribute.createConditional(SpellAttributeType.PERMIT_PLAYER, Trait.ICE, l -> l > 0);
+
+    static final TooltipFactory PERMIT_ENTITY = TooltipFactory.of(PERMIT_PASSIVE, PERMIT_HOSTILE, PERMIT_PLAYER);
+    static final TooltipFactory TARGET = (type, tooltip) -> (TARGET_ITEMS.get(type.traits()) ? TARGET_ITEMS : PERMIT_ENTITY).appendTooltip(type, tooltip);
+
+    static final TooltipFactory TOOLTIP = TooltipFactory.of(RANGE, TARGET, CAST_ON);
+
     protected final TargetSelecter targetSelecter = new TargetSelecter(this).setFilter(this::isValidTarget);
 
     private final Lerp radius = new Lerp(0);
@@ -58,7 +78,7 @@ public class ShieldSpell extends AbstractSpell {
 
     @Override
     public Spell prepareForCast(Caster<?> caster, CastingMethod method) {
-        return method == CastingMethod.STAFF || getTraits().get(Trait.GENEROSITY) > 0 ? toPlaceable() : this;
+        return method == CastingMethod.STAFF || CAST_ON.get(getTraits()) == CastOn.LOCATION ? toPlaceable() : this;
     }
 
     @Override
@@ -90,6 +110,8 @@ public class ShieldSpell extends AbstractSpell {
 
         if (source.isClient()) {
             generateParticles(source);
+        } else {
+            Ether.get(source.asWorld()).getOrCreate(this, source).setRadius(radius.getValue());
         }
 
         if (situation == Situation.PROJECTILE) {
@@ -142,13 +164,18 @@ public class ShieldSpell extends AbstractSpell {
      * Calculates the maximum radius of the shield. aka The area of effect.
      */
     public double getDrawDropOffRange(Caster<?> source) {
-        float min = (source instanceof Pony ? 4 : 6) + getTraits().get(Trait.POWER);
+        float min = (source instanceof Pony ? 0 : 2) + RANGE.get(getTraits());
         double range = (min + (source.getLevel().getScaled(source instanceof Pony ? 4 : 40) * (source instanceof Pony ? 2 : 10))) / rangeMultiplier.getValue();
 
         return range;
     }
 
     protected boolean isValidTarget(Caster<?> source, Entity entity) {
+
+        if (TARGET_ITEMS.get(getTraits())) {
+            return entity instanceof ItemEntity;
+        }
+
         boolean valid = (entity instanceof LivingEntity
                 || entity instanceof TntEntity
                 || entity instanceof FallingBlockEntity
@@ -159,13 +186,13 @@ public class ShieldSpell extends AbstractSpell {
                 || entity instanceof BoatEntity
         );
 
-        if (getTraits().get(Trait.LIFE) > 0) {
+        if (PERMIT_PASSIVE.get(getTraits())) {
             valid &= !(entity instanceof PassiveEntity);
         }
-        if (getTraits().get(Trait.BLOOD) > 0) {
+        if (PERMIT_HOSTILE.get(getTraits())) {
             valid &= !(entity instanceof HostileEntity);
         }
-        if (getTraits().get(Trait.ICE) > 0) {
+        if (PERMIT_PLAYER.get(getTraits())) {
             valid &= !(entity instanceof PlayerEntity);
         }
         return valid;

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/SiphoningSpell.java

@@ -15,6 +15,8 @@ import com.minelittlepony.unicopia.ability.magic.spell.Situation;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.Trait;
 import com.minelittlepony.unicopia.entity.damage.UDamageTypes;
 import com.minelittlepony.unicopia.entity.player.Pony;
+import com.minelittlepony.unicopia.network.track.DataTracker;
+import com.minelittlepony.unicopia.network.track.TrackableDataType;
 import com.minelittlepony.unicopia.particle.FollowingParticleEffect;
 import com.minelittlepony.unicopia.particle.ParticleUtils;
 import com.minelittlepony.unicopia.particle.UParticles;
@@ -37,6 +39,7 @@ import net.minecraft.util.math.Vec3d;
 public class SiphoningSpell extends AbstractAreaEffectSpell {
     static final Predicate<Entity> TARGET_PREDICATE = EntityPredicates.EXCEPT_CREATIVE_OR_SPECTATOR.and(EntityPredicates.VALID_LIVING_ENTITY);
 
+    private final DataTracker.Entry<Boolean> upset = dataTracker.startTracking(TrackableDataType.BOOLEAN, false);
     private int ticksUpset;
 
     protected SiphoningSpell(CustomisedSpellType<?> type) {
@@ -51,12 +54,12 @@ public class SiphoningSpell extends AbstractAreaEffectSpell {
     @Override
     public boolean tick(Caster<?> source, Situation situation) {
 
-        if (ticksUpset > 0) {
-            ticksUpset--;
+        if (ticksUpset > 0 && --ticksUpset <= 0) {
+            upset.set(false);
         }
 
         if (source.isClient()) {
-            float radius = 4 + source.getLevel().getScaled(5);
+            float radius = source.getLevel().getScaled(5) + RANGE.get(getTraits());
             int direction = isFriendlyTogether(source) ? 1 : -1;
 
             source.spawnParticles(new Sphere(true, radius, 1, 0, 1), 1, pos -> {
@@ -102,7 +105,7 @@ public class SiphoningSpell extends AbstractAreaEffectSpell {
                 } else {
                     e.damage(damage, e.getHealth() / 4);
                     ticksUpset = 100;
-                    setDirty();
+                    upset.set(true);
                 }
             } else {
                 e.heal((float)Math.min(source.getLevel().getScaled(e.getHealth()) / 2F, maxHealthGain * 0.6));
@@ -168,5 +171,8 @@ public class SiphoningSpell extends AbstractAreaEffectSpell {
     public void fromNBT(NbtCompound compound) {
         super.fromNBT(compound);
         ticksUpset = compound.getInt("upset");
+        if (ticksUpset > 0) {
+            upset.set(true);
+        }
     }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/SpellType.java

@@ -2,18 +2,21 @@ package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
 import org.jetbrains.annotations.Nullable;
 
+import com.google.common.base.Suppliers;
 import com.minelittlepony.unicopia.Affinity;
 import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.ability.magic.Affine;
 import com.minelittlepony.unicopia.ability.magic.SpellPredicate;
+import com.minelittlepony.unicopia.ability.magic.spell.AbstractAreaEffectSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.ChangelingFeedingSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.DispersableDisguiseSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.RainboomAbilitySpell;
-import com.minelittlepony.unicopia.ability.magic.spell.PlaceableSpell;
+import com.minelittlepony.unicopia.ability.magic.spell.PlacementControlSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.RageAbilitySpell;
 import com.minelittlepony.unicopia.ability.magic.spell.Spell;
 import com.minelittlepony.unicopia.ability.magic.spell.ThrowableSpell;
 import com.minelittlepony.unicopia.ability.magic.spell.TimeControlAbilitySpell;
+import com.minelittlepony.unicopia.ability.magic.spell.attribute.TooltipFactory;
 import com.minelittlepony.unicopia.ability.magic.spell.trait.SpellTraits;
 import com.minelittlepony.unicopia.item.GemstoneItem;
 import com.minelittlepony.unicopia.item.UItems;
@@ -34,47 +37,47 @@ import net.minecraft.server.command.ServerCommandSource;
 
 public final class SpellType<T extends Spell> implements Affine, SpellPredicate<T> {
     public static final Identifier EMPTY_ID = Unicopia.id("none");
-    public static final SpellType<?> EMPTY_KEY = new SpellType<>(EMPTY_ID, Affinity.NEUTRAL, 0xFFFFFF, false, GemstoneItem.Shape.ROUND, SpellTraits.EMPTY, t -> null);
+    public static final SpellType<?> EMPTY_KEY = builder(t -> null).affinity(Affinity.NEUTRAL).color(0xFFFFFF).unobtainable().build(EMPTY_ID);
 
     public static final Registry<SpellType<?>> REGISTRY = RegistryUtils.createSimple(Unicopia.id("spells"));
     public static final RegistryKey<? extends Registry<SpellType<?>>> REGISTRY_KEY = REGISTRY.getKey();
 
     private static final DynamicCommandExceptionType UNKNOWN_SPELL_TYPE_EXCEPTION = new DynamicCommandExceptionType(id -> Text.translatable("spell_type.unknown", id));
 
-    public static final SpellType<PlaceableSpell> PLACED_SPELL = register("placed", Affinity.NEUTRAL, 0, false, GemstoneItem.Shape.DONUT, SpellTraits.EMPTY, PlaceableSpell::new);
-    public static final SpellType<ThrowableSpell> THROWN_SPELL = register("thrown", Affinity.NEUTRAL, 0, false, GemstoneItem.Shape.DONUT, SpellTraits.EMPTY, ThrowableSpell::new);
+    public static final SpellType<PlacementControlSpell> PLACE_CONTROL_SPELL = register("place_controller", SpellType.<PlacementControlSpell>builder(PlacementControlSpell::new).affinity(Affinity.NEUTRAL).unobtainable().stackable().shape(GemstoneItem.Shape.DONUT));
+    public static final SpellType<ThrowableSpell> THROWN_SPELL = register("thrown", SpellType.<ThrowableSpell>builder(ThrowableSpell::new).affinity(Affinity.NEUTRAL).unobtainable().shape(GemstoneItem.Shape.DONUT));
 
-    public static final SpellType<DispersableDisguiseSpell> CHANGELING_DISGUISE = register("disguise", Affinity.BAD, 0x19E48E, false, GemstoneItem.Shape.ARROW, SpellTraits.EMPTY, DispersableDisguiseSpell::new);
-    public static final SpellType<ChangelingFeedingSpell> FEED = register("feed", Affinity.BAD, 0xBDBDF9, false, GemstoneItem.Shape.ARROW, SpellTraits.EMPTY, ChangelingFeedingSpell::new);
-    public static final SpellType<RainboomAbilitySpell> RAINBOOM = register("rainboom", Affinity.GOOD, 0xBDBDF9, false, GemstoneItem.Shape.ROCKET, SpellTraits.EMPTY, RainboomAbilitySpell::new);
-    public static final SpellType<RageAbilitySpell> RAGE = register("rage", Affinity.GOOD, 0xBDBDF9, false, GemstoneItem.Shape.FLAME, SpellTraits.EMPTY, RageAbilitySpell::new);
-    public static final SpellType<TimeControlAbilitySpell> TIME_CONTROL = register("time_control", Affinity.GOOD, 0xBDBDF9, false, GemstoneItem.Shape.STAR, SpellTraits.EMPTY, TimeControlAbilitySpell::new);
+    public static final SpellType<DispersableDisguiseSpell> CHANGELING_DISGUISE = register("disguise", builder(DispersableDisguiseSpell::new).affinity(Affinity.BAD).color(0x19E48E).unobtainable().shape(GemstoneItem.Shape.ARROW));
+    public static final SpellType<ChangelingFeedingSpell> FEED = register("feed", SpellType.<ChangelingFeedingSpell>builder(ChangelingFeedingSpell::new).affinity(Affinity.BAD).color(0xBDBDF9).unobtainable().shape(GemstoneItem.Shape.ARROW));
+    public static final SpellType<RainboomAbilitySpell> RAINBOOM = register("rainboom", builder(RainboomAbilitySpell::new).color(0xBDBDF9).unobtainable().shape(GemstoneItem.Shape.ROCKET));
+    public static final SpellType<RageAbilitySpell> RAGE = register("rage", builder(RageAbilitySpell::new).color(0xBDBDF9).unobtainable().shape(GemstoneItem.Shape.FLAME));
+    public static final SpellType<TimeControlAbilitySpell> TIME_CONTROL = register("time_control", builder(TimeControlAbilitySpell::new).color(0xBDBDF9).unobtainable().shape(GemstoneItem.Shape.STAR));
 
-    public static final SpellType<IceSpell> FROST = register("frost", Affinity.GOOD, 0xEABBFF, true, GemstoneItem.Shape.TRIANGLE, IceSpell.DEFAULT_TRAITS, IceSpell::new);
-    public static final SpellType<ChillingBreathSpell> CHILLING_BREATH = register("chilling_breath", Affinity.NEUTRAL, 0xFFEAFF, true, GemstoneItem.Shape.TRIANGLE, ChillingBreathSpell.DEFAULT_TRAITS, ChillingBreathSpell::new);
-    public static final SpellType<ScorchSpell> SCORCH = register("scorch", Affinity.BAD, 0xF8EC1F, true, GemstoneItem.Shape.FLAME, ScorchSpell.DEFAULT_TRAITS, ScorchSpell::new);
-    public static final SpellType<FireSpell> FLAME = register("flame", Affinity.GOOD, 0xFFBB99, true, GemstoneItem.Shape.FLAME, FireSpell.DEFAULT_TRAITS, FireSpell::new);
-    public static final SpellType<InfernoSpell> INFERNAL = register("infernal", Affinity.BAD, 0xFFAA00, true, GemstoneItem.Shape.FLAME, InfernoSpell.DEFAULT_TRAITS, InfernoSpell::new);
-    public static final SpellType<ShieldSpell> SHIELD = register("shield", Affinity.NEUTRAL, 0x66CDAA, true, GemstoneItem.Shape.SHIELD, ShieldSpell.DEFAULT_TRAITS, ShieldSpell::new);
-    public static final SpellType<AreaProtectionSpell> ARCANE_PROTECTION = register("arcane_protection", Affinity.BAD, 0x99CDAA, true, GemstoneItem.Shape.SHIELD, AreaProtectionSpell.DEFAULT_TRAITS, AreaProtectionSpell::new);
-    public static final SpellType<AttractiveSpell> VORTEX = register("vortex", Affinity.NEUTRAL, 0xFFEA88, true, GemstoneItem.Shape.VORTEX, AttractiveSpell.DEFAULT_TRAITS, AttractiveSpell::new);
-    public static final SpellType<DarkVortexSpell> DARK_VORTEX = register("dark_vortex", Affinity.BAD, 0xA33333, true, GemstoneItem.Shape.VORTEX, DarkVortexSpell.DEFAULT_TRAITS, DarkVortexSpell::new);
-    public static final SpellType<NecromancySpell> NECROMANCY = register("necromancy", Affinity.BAD, 0xFA3A3A, true, GemstoneItem.Shape.SKULL, SpellTraits.EMPTY, NecromancySpell::new);
-    public static final SpellType<SiphoningSpell> SIPHONING = register("siphoning", Affinity.NEUTRAL, 0xFFA3AA, true, GemstoneItem.Shape.LAMBDA, SpellTraits.EMPTY, SiphoningSpell::new);
-    public static final SpellType<DisperseIllusionSpell> REVEALING = register("reveal", Affinity.GOOD, 0xFFFFAF, true, GemstoneItem.Shape.CROSS, SpellTraits.EMPTY, DisperseIllusionSpell::new);
-    public static final SpellType<AwkwardSpell> AWKWARD = register("awkward", Affinity.GOOD, 0x3A59FF, true, GemstoneItem.Shape.ICE, SpellTraits.EMPTY, AwkwardSpell::new);
-    public static final SpellType<TransformationSpell> TRANSFORMATION = register("transformation", Affinity.GOOD, 0x19E48E, true, GemstoneItem.Shape.BRUSH, SpellTraits.EMPTY, TransformationSpell::new);
-    public static final SpellType<FeatherFallSpell> FEATHER_FALL = register("feather_fall", Affinity.GOOD, 0x00EEFF, true, GemstoneItem.Shape.LAMBDA, FeatherFallSpell.DEFAULT_TRAITS, FeatherFallSpell::new);
-    public static final SpellType<CatapultSpell> CATAPULT = register("catapult", Affinity.GOOD, 0x22FF00, true, GemstoneItem.Shape.ROCKET, CatapultSpell.DEFAULT_TRAITS, CatapultSpell::new);
-    public static final SpellType<FireBoltSpell> FIRE_BOLT = register("fire_bolt", Affinity.GOOD, 0xFF8811, true, GemstoneItem.Shape.FLAME, FireBoltSpell.DEFAULT_TRAITS, FireBoltSpell::new);
-    public static final SpellType<LightSpell> LIGHT = register("light", Affinity.GOOD, 0xEEFFAA, true, GemstoneItem.Shape.STAR, LightSpell.DEFAULT_TRAITS, LightSpell::new);
-    public static final SpellType<DisplacementSpell> DISPLACEMENT = register("displacement", Affinity.NEUTRAL, 0x9900FF, true, GemstoneItem.Shape.BRUSH, PortalSpell.DEFAULT_TRAITS, DisplacementSpell::new);
-    public static final SpellType<PortalSpell> PORTAL = register("portal", Affinity.GOOD, 0x99FFFF, true, GemstoneItem.Shape.RING, PortalSpell.DEFAULT_TRAITS, PortalSpell::new);
-    public static final SpellType<MimicSpell> MIMIC = register("mimic", Affinity.GOOD, 0xFFFF00, true, GemstoneItem.Shape.ARROW, SpellTraits.EMPTY, MimicSpell::new);
-    public static final SpellType<MindSwapSpell> MIND_SWAP = register("mind_swap", Affinity.BAD, 0xF9FF99, true, GemstoneItem.Shape.WAVE, SpellTraits.EMPTY, MindSwapSpell::new);
-    public static final SpellType<HydrophobicSpell> HYDROPHOBIC = register("hydrophobic", Affinity.NEUTRAL, 0xF999FF, true, GemstoneItem.Shape.ROCKET, SpellTraits.EMPTY, s -> new HydrophobicSpell(s, FluidTags.WATER));
-    public static final SpellType<BubbleSpell> BUBBLE = register("bubble", Affinity.NEUTRAL, 0xF999FF, true, GemstoneItem.Shape.DONUT, BubbleSpell.DEFAULT_TRAITS, BubbleSpell::new);
-    public static final SpellType<DispellEvilSpell> DISPEL_EVIL = register("dispel_evil", Affinity.GOOD, 0x00FF00, true, GemstoneItem.Shape.CROSS, DispellEvilSpell.DEFAULT_TRAITS, DispellEvilSpell::new);
+    public static final SpellType<IceSpell> FROST = register("frost", builder(IceSpell::new).color(0xEABBFF).shape(GemstoneItem.Shape.TRIANGLE).traits(IceSpell.DEFAULT_TRAITS).tooltip(IceSpell.TOOLTIP));
+    public static final SpellType<ChillingBreathSpell> CHILLING_BREATH = register("chilling_breath", builder(ChillingBreathSpell::new).affinity(Affinity.NEUTRAL).color(0xFFEAFF).shape(GemstoneItem.Shape.TRIANGLE).traits(ChillingBreathSpell.DEFAULT_TRAITS));
+    public static final SpellType<ScorchSpell> SCORCH = register("scorch", builder(ScorchSpell::new).affinity(Affinity.BAD).color(0xF8EC1F).stackable().shape(GemstoneItem.Shape.FLAME).traits(ScorchSpell.DEFAULT_TRAITS).tooltip(AbstractAreaEffectSpell.TOOLTIP));
+    public static final SpellType<FireSpell> FLAME = register("flame", builder(FireSpell::new).color(0xFFBB99).shape(GemstoneItem.Shape.FLAME).traits(FireSpell.DEFAULT_TRAITS).tooltip(AbstractAreaEffectSpell.TOOLTIP));
+    public static final SpellType<InfernoSpell> INFERNAL = register("infernal", builder(InfernoSpell::new).affinity(Affinity.BAD).color(0xFFAA00).shape(GemstoneItem.Shape.FLAME).traits(InfernoSpell.DEFAULT_TRAITS).tooltip(AbstractAreaEffectSpell.TOOLTIP));
+    public static final SpellType<ShieldSpell> SHIELD = register("shield", builder(ShieldSpell::new).affinity(Affinity.NEUTRAL).color(0x66CDAA).shape(GemstoneItem.Shape.SHIELD).traits(ShieldSpell.DEFAULT_TRAITS).tooltip(ShieldSpell.TOOLTIP));
+    public static final SpellType<AreaProtectionSpell> ARCANE_PROTECTION = register("arcane_protection", builder(AreaProtectionSpell::new).affinity(Affinity.BAD).color(0x99CDAA).shape(GemstoneItem.Shape.SHIELD).traits(AreaProtectionSpell.DEFAULT_TRAITS).tooltip(AreaProtectionSpell.TOOLTIP));
+    public static final SpellType<AttractiveSpell> VORTEX = register("vortex", builder(AttractiveSpell::new).affinity(Affinity.NEUTRAL).color(0xFFEA88).shape(GemstoneItem.Shape.VORTEX).traits(AttractiveSpell.DEFAULT_TRAITS).tooltip(AttractiveSpell.TOOLTIP));
+    public static final SpellType<DarkVortexSpell> DARK_VORTEX = register("dark_vortex", builder(DarkVortexSpell::new).affinity(Affinity.BAD).color(0xA33333).stackable().shape(GemstoneItem.Shape.VORTEX).traits(DarkVortexSpell.DEFAULT_TRAITS));
+    public static final SpellType<NecromancySpell> NECROMANCY = register("necromancy", builder(NecromancySpell::new).affinity(Affinity.BAD).color(0xFA3A3A).shape(GemstoneItem.Shape.SKULL).tooltip(NecromancySpell.TOOLTIP));
+    public static final SpellType<SiphoningSpell> SIPHONING = register("siphoning", builder(SiphoningSpell::new).affinity(Affinity.NEUTRAL).color(0xFFA3AA).shape(GemstoneItem.Shape.LAMBDA).tooltip(AbstractAreaEffectSpell.TOOLTIP));
+    public static final SpellType<DisperseIllusionSpell> REVEALING = register("reveal", builder(DisperseIllusionSpell::new).color(0xFFFFAF).shape(GemstoneItem.Shape.CROSS).tooltip(DisperseIllusionSpell.TOOLTIP));
+    public static final SpellType<AwkwardSpell> AWKWARD = register("awkward", builder(AwkwardSpell::new).affinity(Affinity.NEUTRAL).color(0x3A59FF).shape(GemstoneItem.Shape.ICE));
+    public static final SpellType<TransformationSpell> TRANSFORMATION = register("transformation", builder(TransformationSpell::new).color(0x19E48E).shape(GemstoneItem.Shape.BRUSH));
+    public static final SpellType<FeatherFallSpell> FEATHER_FALL = register("feather_fall", builder(FeatherFallSpell::new).color(0x00EEFF).shape(GemstoneItem.Shape.LAMBDA).traits(FeatherFallSpell.DEFAULT_TRAITS).tooltip(FeatherFallSpell.TOOLTIP));
+    public static final SpellType<CatapultSpell> CATAPULT = register("catapult", builder(CatapultSpell::new).color(0x22FF00).shape(GemstoneItem.Shape.ROCKET).traits(CatapultSpell.DEFAULT_TRAITS).tooltip(CatapultSpell.TOOLTIP));
+    public static final SpellType<FireBoltSpell> FIRE_BOLT = register("fire_bolt", builder(FireBoltSpell::new).color(0xFF8811).shape(GemstoneItem.Shape.FLAME).traits(FireBoltSpell.DEFAULT_TRAITS).tooltip(FireBoltSpell.TOOLTIP));
+    public static final SpellType<LightSpell> LIGHT = register("light", builder(LightSpell::new).color(0xEEFFAA).shape(GemstoneItem.Shape.STAR).traits(LightSpell.DEFAULT_TRAITS).tooltip(LightSpell.TOOLTIP));
+    public static final SpellType<DisplacementSpell> DISPLACEMENT = register("displacement", builder(DisplacementSpell::new).affinity(Affinity.NEUTRAL).color(0x9900FF).stackable().shape(GemstoneItem.Shape.BRUSH).traits(PortalSpell.DEFAULT_TRAITS).tooltip(DisplacementSpell.TOOLTIP));
+    public static final SpellType<PortalSpell> PORTAL = register("portal", builder(PortalSpell::new).color(0x99FFFF).shape(GemstoneItem.Shape.RING).traits(PortalSpell.DEFAULT_TRAITS));
+    public static final SpellType<MimicSpell> MIMIC = register("mimic", builder(MimicSpell::new).color(0xFFFF00).shape(GemstoneItem.Shape.ARROW).tooltip(MimicSpell.TOOLTIP));
+    public static final SpellType<MindSwapSpell> MIND_SWAP = register("mind_swap", builder(MindSwapSpell::new).affinity(Affinity.BAD).color(0xF9FF99).shape(GemstoneItem.Shape.WAVE).tooltip(MimicSpell.TOOLTIP));
+    public static final SpellType<HydrophobicSpell> HYDROPHOBIC = register("hydrophobic", SpellType.<HydrophobicSpell>builder(s -> new HydrophobicSpell(s, FluidTags.WATER)).affinity(Affinity.NEUTRAL).color(0xF999FF).stackable().shape(GemstoneItem.Shape.ROCKET).tooltip(HydrophobicSpell.TOOLTIP));
+    public static final SpellType<BubbleSpell> BUBBLE = register("bubble", builder(BubbleSpell::new).affinity(Affinity.NEUTRAL).color(0xF999FF).shape(GemstoneItem.Shape.DONUT).traits(BubbleSpell.DEFAULT_TRAITS).tooltip(BubbleSpell.TOOLTIP));
+    public static final SpellType<DispellEvilSpell> DISPEL_EVIL = register("dispel_evil", builder(DispellEvilSpell::new).color(0x00FF00).shape(GemstoneItem.Shape.CROSS).traits(DispellEvilSpell.DEFAULT_TRAITS).tooltip(DispellEvilSpell.TOOLTIP));
 
     public static void bootstrap() {}
 
@@ -82,6 +85,7 @@ public final class SpellType<T extends Spell> implements Affine, SpellPredicate<
     private final Affinity affinity;
     private final int color;
     private final boolean obtainable;
+    private final boolean stackable;
     private final GemstoneItem.Shape shape;
 
     private final Factory<T> factory;
@@ -94,15 +98,19 @@ public final class SpellType<T extends Spell> implements Affine, SpellPredicate<
 
     private final ItemStack defaultStack;
 
-    private SpellType(Identifier id, Affinity affinity, int color, boolean obtainable, GemstoneItem.Shape shape, SpellTraits traits, Factory<T> factory) {
+    private final TooltipFactory tooltipFunction;
+
+    private SpellType(Identifier id, Affinity affinity, int color, boolean obtainable, boolean stackable, GemstoneItem.Shape shape, SpellTraits traits, TooltipFactory tooltipFunction, Factory<T> factory) {
         this.id = id;
         this.affinity = affinity;
         this.color = color;
         this.obtainable = obtainable;
         this.shape = shape;
+        this.tooltipFunction = tooltipFunction;
         this.factory = factory;
         this.traits = traits;
-        traited = new CustomisedSpellType<>(this, traits);
+        this.stackable = stackable;
+        traited = new CustomisedSpellType<>(this, traits, SpellTraits::empty);
         defaultStack = UItems.GEMSTONE.getDefaultStack(this);
     }
 
@@ -110,6 +118,10 @@ public final class SpellType<T extends Spell> implements Affine, SpellPredicate<
         return obtainable;
     }
 
+    public boolean isStackable() {
+        return stackable;
+    }
+
     public Identifier getId() {
         return id;
     }
@@ -154,16 +166,20 @@ public final class SpellType<T extends Spell> implements Affine, SpellPredicate<
     }
 
     public CustomisedSpellType<T> withTraits(SpellTraits traits) {
-        return traits.isEmpty() ? withTraits() : new CustomisedSpellType<>(this, traits);
+        return traits.isEmpty() ? withTraits() : new CustomisedSpellType<>(this, traits, Suppliers.memoize(() -> traits.map((trait, value) -> value - getTraits().get(trait))));
     }
 
     public Factory<T> getFactory() {
         return factory;
     }
 
+    public TooltipFactory getTooltip() {
+        return tooltipFunction;
+    }
+
     @Override
     public boolean test(@Nullable Spell spell) {
-        return spell != null && spell.getType() == this;
+        return spell != null && spell.getTypeAndTraits().type() == this;
     }
 
     public void toNbt(NbtCompound tag) {
@@ -179,12 +195,12 @@ public final class SpellType<T extends Spell> implements Affine, SpellPredicate<
         return "SpellType[" + getTranslationKey() + "]";
     }
 
-    public static <T extends Spell> SpellType<T> register(String name, Affinity affinity, int color, boolean obtainable, GemstoneItem.Shape shape, SpellTraits traits, Factory<T> factory) {
-        return register(Unicopia.id(name), affinity, color, obtainable, shape, traits, factory);
+    public static <T extends Spell> SpellType<T> register(String name, Builder<T> builder) {
+        return register(Unicopia.id(name), builder);
     }
 
-    public static <T extends Spell> SpellType<T> register(Identifier id, Affinity affinity, int color, boolean obtainable, GemstoneItem.Shape shape, SpellTraits traits, Factory<T> factory) {
-        return Registry.register(REGISTRY, id, new SpellType<>(id, affinity, color, obtainable, shape, traits, factory));
+    public static <T extends Spell> SpellType<T> register(Identifier id, Builder<T> builder) {
+        return Registry.register(REGISTRY, id, builder.build(id));
     }
 
     @SuppressWarnings("unchecked")
@@ -209,4 +225,62 @@ public final class SpellType<T extends Spell> implements Affine, SpellPredicate<
     public interface Factory<T extends Spell> {
         T create(CustomisedSpellType<T> type);
     }
+
+    public static <T extends Spell> Builder<T> builder(Factory<T> factory) {
+        return new Builder<>(factory);
+    }
+
+    static class Builder<T extends Spell> {
+        private final Factory<T> factory;
+        private Affinity affinity = Affinity.GOOD;
+        private int color;
+        private boolean obtainable = true;
+        private boolean stackable = false;
+        private GemstoneItem.Shape shape = GemstoneItem.Shape.ROUND;
+        private SpellTraits traits = SpellTraits.EMPTY;
+        private TooltipFactory tooltipFunction = TooltipFactory.EMPTY;
+
+        Builder(Factory<T> factory) {
+            this.factory = factory;
+        }
+
+        public Builder<T> affinity(Affinity affinity) {
+            this.affinity = affinity;
+            return this;
+        }
+
+        public Builder<T> color(int color) {
+            this.color = color;
+            return this;
+        }
+
+        public Builder<T> unobtainable() {
+            obtainable = false;
+            return this;
+        }
+
+        public Builder<T> stackable() {
+            stackable = true;
+            return this;
+        }
+
+        public Builder<T> shape(GemstoneItem.Shape shape) {
+            this.shape = shape;
+            return this;
+        }
+
+        public Builder<T> traits(SpellTraits traits) {
+            this.traits = traits;
+            return this;
+        }
+
+        public Builder<T> tooltip(TooltipFactory tooltipFunction) {
+            this.tooltipFunction = tooltipFunction;
+            return this;
+        }
+
+        public SpellType<T> build(Identifier id) {
+            return new SpellType<>(id, affinity, color, obtainable, stackable, shape, traits, tooltipFunction, factory);
+        }
+    }
 }

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/trait/SpellTraits.java

@@ -67,6 +67,10 @@ public final class SpellTraits implements Iterable<Map.Entry<Trait, Float>> {
         });
     }
 
+    public static SpellTraits empty() {
+        return EMPTY;
+    }
+
     public static Map<Identifier, SpellTraits> all() {
         return new HashMap<>(REGISTRY);
     }
@@ -292,7 +296,8 @@ public final class SpellTraits implements Iterable<Map.Entry<Trait, Float>> {
         return fromString(traits, " ");
     }
 
-    public static Optional<SpellTraits> fromString(String traits, String delimiter) {
+    @Deprecated
+    private static Optional<SpellTraits> fromString(String traits, String delimiter) {
         return fromEntries(Arrays.stream(traits.split(delimiter)).map(a -> a.split(":")).map(pair -> {
             Trait key = Trait.fromName(pair[0]).orElse(null);
             if (key == null) {

src/main/java/com/minelittlepony/unicopia/ability/magic/spell/trait/Trait.java

@@ -165,7 +165,11 @@ public enum Trait implements CommandArgumentEnum<Trait> {
 
     @Deprecated
     public static Optional<Trait> fromName(String name) {
-        return Optional.ofNullable(CODEC.byId(name));
+        Trait trait = CODEC.byId(name);
+        if (trait == null) {
+            Unicopia.LOGGER.error("Unknown trait: " + name);
+        }
+        return Optional.ofNullable(trait);
     }
 
     public static EnumArgumentType<Trait> argument() {

src/main/java/com/minelittlepony/unicopia/block/UBlocks.java

@@ -112,9 +112,9 @@ public interface UBlocks {
     Block PALM_TRAPDOOR = register("palm_trapdoor", new TrapdoorBlock(Settings.create().mapColor(PALM_PLANKS.getDefaultMapColor()).instrument(Instrument.BASS).strength(3).nonOpaque().allowsSpawning(BlockConstructionUtils::never).burnable(), UWoodTypes.PALM.setType()), ItemGroups.FUNCTIONAL);
     Block PALM_PRESSURE_PLATE = register("palm_pressure_plate", new PressurePlateBlock(PressurePlateBlock.ActivationRule.EVERYTHING, Settings.create().mapColor(PALM_PLANKS.getDefaultMapColor()).noCollision().strength(0.5f).sounds(BlockSoundGroup.WOOD).pistonBehavior(PistonBehavior.DESTROY), UWoodTypes.PALM.setType()), ItemGroups.BUILDING_BLOCKS);
     Block PALM_BUTTON = register("palm_button", BlockConstructionUtils.woodenButton(), ItemGroups.BUILDING_BLOCKS);
-    Block PALM_SIGN = register("palm_sign", new SignBlock(Settings.create().mapColor(PALM_PLANKS.getDefaultMapColor()).solid().instrument(Instrument.BASS).noCollision().strength(1).burnable().sounds(BlockSoundGroup.WOOD), UWoodTypes.PALM), ItemGroups.FUNCTIONAL);
+    Block PALM_SIGN = register("palm_sign", new SignBlock(Settings.create().mapColor(PALM_PLANKS.getDefaultMapColor()).solid().instrument(Instrument.BASS).noCollision().strength(1).burnable().sounds(BlockSoundGroup.WOOD), UWoodTypes.PALM));
     Block PALM_WALL_SIGN = register("palm_wall_sign", new WallSignBlock(Settings.create().mapColor(PALM_PLANKS.getDefaultMapColor()).solid().instrument(Instrument.BASS).noCollision().strength(1).dropsLike(PALM_SIGN).burnable(), UWoodTypes.PALM));
-    Block PALM_HANGING_SIGN = register("palm_hanging_sign", new HangingSignBlock(Settings.create().mapColor(PALM_LOG.getDefaultMapColor()).solid().instrument(Instrument.BASS).noCollision().strength(1).burnable(), UWoodTypes.PALM), ItemGroups.FUNCTIONAL);
+    Block PALM_HANGING_SIGN = register("palm_hanging_sign", new HangingSignBlock(Settings.create().mapColor(PALM_LOG.getDefaultMapColor()).solid().instrument(Instrument.BASS).noCollision().strength(1).burnable(), UWoodTypes.PALM));
     Block PALM_WALL_HANGING_SIGN = register("palm_wall_hanging_sign", new WallHangingSignBlock(Settings.create().mapColor(PALM_LOG.getDefaultMapColor()).solid().instrument(Instrument.BASS).noCollision().strength(1.0f).burnable().dropsLike(PALM_HANGING_SIGN), UWoodTypes.PALM));
 
     Block PALM_LEAVES = register("palm_leaves", BlockConstructionUtils.createLeavesBlock(BlockSoundGroup.GRASS), ItemGroups.BUILDING_BLOCKS);

src/main/java/com/minelittlepony/unicopia/block/cloud/UnstableCloudBlock.java

@@ -2,9 +2,9 @@ package com.minelittlepony.unicopia.block.cloud;
 
 import java.util.Optional;
 
-import com.minelittlepony.unicopia.entity.mob.StormCloudEntity;
 import com.minelittlepony.unicopia.particle.LightningBoltParticleEffect;
 import com.minelittlepony.unicopia.particle.ParticleUtils;
+import com.minelittlepony.unicopia.util.PosHelper;
 
 import net.minecraft.block.Block;
 import net.minecraft.block.BlockState;
@@ -82,7 +82,7 @@ public class UnstableCloudBlock extends CloudBlock {
                 );
                 BlockPos shockPosition = lightningRodPos.or(() -> {
                     return sw.getOtherEntities(entity, new Box(pos.down()).expand(5, 0, 5).stretch(0, -10, 0)).stream().findAny().map(Entity::getBlockPos);
-                }).orElseGet(() -> StormCloudEntity.findSurfaceBelow(sw, pos.add(world.random.nextInt(10) - 5, -world.random.nextInt(10), world.random.nextInt(10) - 5)).toImmutable());
+                }).orElseGet(() -> PosHelper.findNearestSurface(sw, pos.add(world.random.nextInt(10) - 5, -world.random.nextInt(10), world.random.nextInt(10) - 5)).toImmutable());
 
                 ParticleUtils.spawnParticle(world,
                         new LightningBoltParticleEffect(false, 10, 6, 0.3F, Optional.of(shockPosition.toCenterPos())),

src/main/java/com/minelittlepony/unicopia/client/URenderers.java

@@ -56,7 +56,6 @@ import net.minecraft.client.particle.SpriteProvider;
 import net.minecraft.client.render.*;
 import net.minecraft.client.render.VertexConsumerProvider.Immediate;
 import net.minecraft.client.render.block.entity.BlockEntityRendererFactories;
-import net.minecraft.client.render.entity.EmptyEntityRenderer;
 import net.minecraft.client.render.entity.FlyingItemEntityRenderer;
 import net.minecraft.client.render.item.ItemRenderer;
 import net.minecraft.client.render.model.json.ModelTransformationMode;
@@ -115,7 +114,7 @@ public interface URenderers {
         EntityRendererRegistry.register(UEntities.LOOT_BUG, LootBugEntityRenderer::new);
         EntityRendererRegistry.register(UEntities.TENTACLE, TentacleEntityRenderer::new);
         EntityRendererRegistry.register(UEntities.IGNOMINIOUS_BULB, IgnominiousBulbEntityRenderer::new);
-        EntityRendererRegistry.register(UEntities.SPECTER, EmptyEntityRenderer::new);
+        EntityRendererRegistry.register(UEntities.SPECTER, SpecterEntityRenderer::new);
         EntityRendererRegistry.register(UEntities.MIMIC, MimicEntityRenderer::new);
 
         BlockEntityRendererFactories.register(UBlockEntities.WEATHER_VANE, WeatherVaneBlockEntityRenderer::new);

src/main/java/com/minelittlepony/unicopia/client/gui/DismissSpellScreen.java

@@ -2,14 +2,13 @@ package com.minelittlepony.unicopia.client.gui;
 
 import java.util.ArrayList;
 import java.util.List;
-
 import org.joml.Vector4f;
 
+import com.google.common.base.MoreObjects;
 import com.minelittlepony.common.client.gui.GameGui;
 import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.ability.magic.SpellPredicate;
 import com.minelittlepony.unicopia.ability.magic.spell.*;
-import com.minelittlepony.unicopia.client.TextHelper;
 import com.minelittlepony.unicopia.client.render.model.SphereModel;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.item.UItems;
@@ -41,11 +40,11 @@ public class DismissSpellScreen extends GameGui {
         double azimuth = 0;
         double ring = 2;
 
-        List<PlaceableSpell> placeableSpells = new ArrayList<>();
+        List<PlacementControlSpell> placeableSpells = new ArrayList<>();
 
-        for (Spell spell : pony.getSpellSlot().stream(true).filter(SpellPredicate.IS_VISIBLE).toList()) {
+        for (Spell spell : pony.getSpellSlot().stream().filter(SpellPredicate.IS_VISIBLE).toList()) {
 
-            if (spell instanceof PlaceableSpell placeable) {
+            if (spell instanceof PlacementControlSpell placeable) {
                 if (placeable.getPosition().isPresent()) {
                     placeableSpells.add(placeable);
                     continue;
@@ -58,15 +57,16 @@ public class DismissSpellScreen extends GameGui {
         }
 
         double minimalDistance = 75 * (ring - 1) - 25;
-        Vec3d origin = pony.getOriginVector();
+        Vec3d origin = pony.asEntity().getPos();
 
         placeableSpells.forEach(placeable -> {
             placeable.getPosition().ifPresent(position -> {
-                Vec3d relativePos = position.subtract(origin);
+                Vec3d relativePos = position.subtract(origin).multiply(1, 0, 1);
+                float yaw = client.gameRenderer.getCamera().getYaw();
                 Vec3d cartesian = relativePos
                         .normalize()
-                        .multiply(minimalDistance + relativePos.length())
-                        .rotateY((pony.asEntity().getYaw() - 180) * MathHelper.RADIANS_PER_DEGREE);
+                        .multiply(minimalDistance + relativePos.horizontalLength())
+                        .rotateY((180 + yaw) * MathHelper.RADIANS_PER_DEGREE);
                 addDrawableChild(new Entry(placeable).ofCartesian(cartesian));
             });
         });
@@ -84,8 +84,8 @@ public class DismissSpellScreen extends GameGui {
         matrices.push();
         matrices.translate(width - mouseX, height - mouseY, 0);
         DrawableUtil.drawLine(matrices, 0, 0, relativeMouseX, relativeMouseY, 0xFFFFFF88);
-        DrawableUtil.drawArc(matrices, 40, 80, 0, DrawableUtil.TAU, 0x00000010, false);
-        DrawableUtil.drawArc(matrices, 160, 1600, 0, DrawableUtil.TAU, 0x00000020, false);
+        DrawableUtil.drawArc(matrices, 40, 80, 0, DrawableUtil.TAU, 0x00000010);
+        DrawableUtil.drawArc(matrices, 160, 1600, 0, DrawableUtil.TAU, 0x00000020);
 
         super.render(context, mouseX, mouseY, delta);
         DrawableUtil.renderRaceIcon(context, pony.getObservedSpecies(), 0, 0, 16);
@@ -137,17 +137,16 @@ public class DismissSpellScreen extends GameGui {
         }
 
         private Spell getActualSpell() {
-            if (spell instanceof AbstractDelegatingSpell) {
-                return ((AbstractDelegatingSpell)spell).getDelegates().stream().findFirst().orElse(spell);
-            }
-            return spell;
+            return spell instanceof AbstractDelegatingSpell s ? MoreObjects.firstNonNull(s.getDelegate(), s)
+                : spell instanceof PlacementControlSpell s ? MoreObjects.firstNonNull(s.getDelegate(), s)
+                : spell;
         }
 
         @Override
         public boolean mouseClicked(double mouseX, double mouseY, int button) {
             if (isMouseOver(relativeMouseX, relativeMouseY)) {
                 remove(this);
-                pony.getSpellSlot().removeIf(spell -> spell == this.spell, true);
+                pony.getSpellSlot().removeIf(spell -> spell == this.spell);
                 Channel.REMOVE_SPELL.sendToServer(new MsgRemoveSpell(spell));
                 playClickEffect();
                 return true;
@@ -164,38 +163,45 @@ public class DismissSpellScreen extends GameGui {
         public void render(DrawContext context, int mouseX, int mouseY, float tickDelta) {
             MatrixStack matrices = context.getMatrices();
 
-            var type = actualSpell.getType().withTraits(actualSpell.getTraits());
+            var type = actualSpell.getTypeAndTraits();
 
             copy.set(mouseX - width * 0.5F - x * 0.5F, mouseY - height * 0.5F - y * 0.5F, 0, 0);
 
             DrawableUtil.drawLine(matrices, 0, 0, (int)x, (int)y, actualSpell.getAffinity().getColor().getColorValue());
-            DrawableUtil.renderItemIcon(context, actualSpell.isDead() ? UItems.BOTCHED_GEM.getDefaultStack() : type.getDefaultStack(),
-                    x - 8 - copy.x * 0.2F,
-                    y - 8 - copy.y * 0.2F,
-                    1
-            );
 
-            int color = actualSpell.getType().getColor() << 2;
+
+            int color = type.type().getColor() << 2;
 
             matrices.push();
             matrices.translate(x, y, 0);
 
-            DrawableUtil.drawArc(matrices, 7, 8, 0, DrawableUtil.TAU, color | 0x00000088, false);
+            matrices.push();
+            matrices.multiply(RotationAxis.POSITIVE_Z.rotationDegrees(((MinecraftClient.getInstance().player.age + tickDelta) * 2) % 360));
+            DrawableUtil.renderItemIcon(context, actualSpell.isDead() ? UItems.BOTCHED_GEM.getDefaultStack() : type.getDefaultStack(),
+                    -8,
+                    -8,
+                    1
+            );
+            matrices.pop();
 
-            if (isMouseOver(relativeMouseX, relativeMouseY)) {
-                DrawableUtil.drawArc(matrices, 0, 8, 0, DrawableUtil.TAU, color | 0x000000FF, false);
+            boolean hovered = isMouseOver(relativeMouseX, relativeMouseY);
+            double radius = (hovered ? 9 + MathHelper.sin((MinecraftClient.getInstance().player.age + tickDelta) / 9F) : 7);
+
+            DrawableUtil.drawArc(matrices, radius, radius + 1, 0, DrawableUtil.TAU, color | 0x00000088);
+
+            if (hovered) {
+                DrawableUtil.drawArc(matrices, 0, 8, 0, DrawableUtil.TAU, color | 0x000000FF);
 
                 List<Text> tooltip = new ArrayList<>();
 
-                MutableText name = actualSpell.getType().getName().copy();
-                color = actualSpell.getType().getColor();
+                MutableText name = type.type().getName().copy();
+                color = type.type().getColor();
                 name.setStyle(name.getStyle().withColor(color == 0 ? 0xFFAAAAAA : color));
                 tooltip.add(Text.translatable("gui.unicopia.dispell_screen.spell_type", name));
-                actualSpell.getType().getTraits().appendTooltip(tooltip);
+                type.traits().appendTooltip(tooltip);
                 tooltip.add(ScreenTexts.EMPTY);
-                tooltip.add(Text.translatable("gui.unicopia.dispell_screen.affinity", actualSpell.getAffinity().name()).formatted(actualSpell.getAffinity().getColor()));
+                type.appendTooltip(tooltip);
                 tooltip.add(ScreenTexts.EMPTY);
-                tooltip.addAll(TextHelper.wrap(Text.translatable(actualSpell.getType().getTranslationKey() + ".lore").formatted(actualSpell.getAffinity().getColor()), 180).toList());
                 if (spell instanceof TimedSpell timed) {
                     tooltip.add(ScreenTexts.EMPTY);
                     tooltip.add(Text.translatable("gui.unicopia.dispell_screen.time_left", StringHelper.formatTicks(timed.getTimer().getTicksRemaining())));

src/main/java/com/minelittlepony/unicopia/client/gui/DrawableUtil.java

@@ -71,27 +71,41 @@ public interface DrawableUtil {
         RenderSystem.disableBlend();
     }
 
+    /**
+     * Renders a colored arc with notches.
+     *
+     * @param mirrorHorizontally Whether or not the arc must be mirrored across the horizontal plane. Will produce a bar that grows from the middle filling both sides.
+     */
+    static void drawNotchedArc(MatrixStack matrices, double innerRadius, double outerRadius, double startAngle, double arcAngle, double notchAngle, double notchSpacing, int color) {
+        double notchBegin = startAngle;
+        double endAngle = startAngle + arcAngle;
+        while (notchBegin < endAngle) {
+            double notchEnd = Math.min(notchBegin + notchAngle, endAngle);
+            if (notchEnd <= notchBegin) {
+                return;
+            }
+            drawArc(matrices, innerRadius, outerRadius, notchBegin, notchEnd - notchBegin, color);
+            notchBegin += notchAngle + notchSpacing;
+        }
+
+    }
+
     /**
      * Renders a colored arc.
      *
      * @param mirrorHorizontally Whether or not the arc must be mirrored across the horizontal plane. Will produce a bar that grows from the middle filling both sides.
      */
-    static void drawArc(MatrixStack matrices, double innerRadius, double outerRadius, double startAngle, double arcAngle, int color, boolean mirrorHorizontally) {
+    static void drawArc(MatrixStack matrices, double innerRadius, double outerRadius, double startAngle, double arcAngle, int color) {
+        if (arcAngle < INCREMENT) {
+            return;
+        }
         float r = (color >> 24 & 255) / 255F;
         float g = (color >> 16 & 255) / 255F;
         float b = (color >> 8 & 255) / 255F;
         float k = (color & 255) / 255F;
 
-        if (arcAngle < INCREMENT) {
-            return;
-        }
-
         final double maxAngle = MathHelper.clamp(startAngle + arcAngle, 0, TAU - INCREMENT);
 
-        if (!mirrorHorizontally) {
-            startAngle = -startAngle;
-        }
-
         RenderSystem.setShaderColor(1, 1, 1, 1);
         RenderSystem.setShader(GameRenderer::getPositionColorProgram);
         RenderSystem.enableBlend();
@@ -102,7 +116,7 @@ public interface DrawableUtil {
         BufferBuilder bufferBuilder = Tessellator.getInstance().getBuffer();
         bufferBuilder.begin(VertexFormat.DrawMode.QUADS, VertexFormats.POSITION_COLOR);
 
-        for (double angle = startAngle; angle >= -maxAngle; angle -= INCREMENT) {
+        for (double angle = -startAngle; angle >= -maxAngle; angle -= INCREMENT) {
             // center
             cylendricalVertex(bufferBuilder, model, innerRadius, angle, r, g, b, k);
             // point one
@@ -116,70 +130,6 @@ public interface DrawableUtil {
         BufferRenderer.drawWithGlobalProgram(bufferBuilder.end());
     }
 
-    /**
-     * Renders hollow circle
-     *
-     * @param mirrorHorizontally Whether or not the arc must be mirrored across the horizontal plane. Will produce a bar that grows from the middle filling both sides.
-     */
-    static void drawArc(MatrixStack matrices, double radius, double startAngle, double arcAngle, int color, boolean mirrorHorizontally) {
-        drawCircle(matrices, radius, startAngle, arcAngle, color, mirrorHorizontally, VertexFormat.DrawMode.DEBUG_LINES);
-    }
-
-    /**
-     * Renders a filled circle.
-     *
-     * @param mirrorHorizontally Whether or not the arc must be mirrored across the horizontal plane. Will produce a bar that grows from the middle filling both sides.
-     */
-    static void drawCircle(MatrixStack matrices, double radius, double startAngle, double arcAngle, int color, boolean mirrorHorizontally) {
-        drawCircle(matrices, radius, startAngle, arcAngle, color, mirrorHorizontally, VertexFormat.DrawMode.QUADS);
-    }
-
-    private static void drawCircle(MatrixStack matrices, double radius, double startAngle, double arcAngle, int color, boolean mirrorHorizontally, VertexFormat.DrawMode mode) {
-        float r = (color >> 24 & 255) / 255F;
-        float g = (color >> 16 & 255) / 255F;
-        float b = (color >> 8 & 255) / 255F;
-        float k = (color & 255) / 255F;
-
-        if (arcAngle < INCREMENT) {
-            return;
-        }
-
-        final double maxAngle = MathHelper.clamp(startAngle + arcAngle, 0, TAU - INCREMENT);
-
-        if (!mirrorHorizontally) {
-            startAngle = -startAngle;
-        }
-
-        RenderSystem.setShaderColor(1, 1, 1, 1);
-        RenderSystem.setShader(GameRenderer::getPositionColorProgram);
-        RenderSystem.enableBlend();
-        RenderSystem.defaultBlendFunc();
-
-        Matrix4f model = matrices.peek().getPositionMatrix();
-
-        BufferBuilder bufferBuilder = Tessellator.getInstance().getBuffer();
-        bufferBuilder.begin(mode, VertexFormats.POSITION_COLOR);
-
-        boolean joinEnds = mode == VertexFormat.DrawMode.QUADS;
-
-        // center
-
-        for (double angle = startAngle; angle >= -maxAngle; angle -= INCREMENT) {
-            if (joinEnds) {
-                bufferBuilder.vertex(model, 0, 0, 0).color(r, g, b, k).next();
-            }
-            // point one
-            cylendricalVertex(bufferBuilder, model, radius, angle, r, g, b, k);
-            // point two
-            cylendricalVertex(bufferBuilder, model, radius, angle + INCREMENT, r, g, b, k);
-            if (joinEnds) {
-                bufferBuilder.vertex(model, 0, 0, 0).color(r, g, b, k).next();
-            }
-        }
-
-        BufferRenderer.drawWithGlobalProgram(bufferBuilder.end());
-    }
-
     private static void cylendricalVertex(BufferBuilder bufferBuilder, Matrix4f model, double radius, double angle, float r, float g, float b, float k) {
         bufferBuilder.vertex(model,
                 (float)(radius * MathHelper.sin((float)angle)),

src/main/java/com/minelittlepony/unicopia/client/gui/HudEffects.java

@@ -7,7 +7,6 @@ import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.entity.duck.EntityDuck;
-import com.minelittlepony.unicopia.entity.effect.EffectUtils;
 import com.minelittlepony.unicopia.entity.effect.UEffects;
 import com.minelittlepony.unicopia.entity.player.Pony;
 
@@ -31,7 +30,7 @@ public class HudEffects {
 
     private static void apply(Pony pony, float tickDelta, boolean on) {
         if (on) {
-            if (!pony.asEntity().hasStatusEffect(StatusEffects.HUNGER) && EffectUtils.getAmplifier(pony.asEntity(), UEffects.FOOD_POISONING) > 0) {
+            if (!pony.asEntity().hasStatusEffect(StatusEffects.HUNGER) && pony.asEntity().hasStatusEffect(UEffects.FOOD_POISONING)) {
                 addedHunger = true;
                 pony.asEntity().addStatusEffect(new StatusEffectInstance(StatusEffects.HUNGER, 1, 1, false, false));
             }

src/main/java/com/minelittlepony/unicopia/client/gui/ManaRingSlot.java

@@ -1,6 +1,7 @@
 package com.minelittlepony.unicopia.client.gui;
 
 import com.minelittlepony.unicopia.Unicopia;
+import com.minelittlepony.unicopia.ability.Abilities;
 import com.minelittlepony.unicopia.ability.AbilityDispatcher;
 import com.minelittlepony.unicopia.ability.AbilitySlot;
 import com.minelittlepony.unicopia.entity.player.MagicReserves;
@@ -21,19 +22,42 @@ class ManaRingSlot extends Slot {
     @Override
     protected void renderContents(DrawContext context, AbilityDispatcher abilities, boolean bSwap, float tickDelta) {
         MatrixStack matrices = context.getMatrices();
+
         matrices.push();
-        matrices.translate(24.5, 25.5, 0);
+        matrices.translate(24.125, 24.75, 0);
 
         Pony pony = Pony.of(uHud.client.player);
         MagicReserves mana = pony.getMagicalReserves();
 
-        double arcBegin = 0;
+        boolean canUseSuper = Abilities.RAGE.canUse(pony.getCompositeRace()) || Abilities.RAINBOOM.canUse(pony.getCompositeRace());
 
-        arcBegin = renderRing(matrices, 17, 13, 0, mana.getMana(), 0xFF88FF99, tickDelta);
+        double maxManaBarSize = canUseSuper ? DrawableUtil.PI : DrawableUtil.TAU;
+        double arcBegin = renderRing(matrices, 17, 13, 0, maxManaBarSize, mana.getMana(), 0xFF88FF99, tickDelta);
+        renderRing(matrices, 17, 13, 0, maxManaBarSize, mana.getExhaustion(), 0xFF002299, tickDelta);
 
         if (!uHud.client.player.isCreative()) {
-            renderRing(matrices, 13, 9, 0, mana.getXp(), 0x88880099, tickDelta);
-            renderRing(matrices, 9, 0, 0, mana.getCharge(), 0x0000FF99, tickDelta);
+
+            int level = pony.getLevel().get();
+            int seconds = level % 16;
+            int minutes = (level / 16) % 16;
+            int hours = level / 32;
+
+            DrawableUtil.drawNotchedArc(matrices, 10, 13, 0, hours * 0.2, 0.1, 0.1, 0x00AA88FF);
+            DrawableUtil.drawNotchedArc(matrices, 10, 13, hours * 0.2, minutes * 0.2, 0.1, 0.1, 0x008888AA);
+            DrawableUtil.drawNotchedArc(matrices, 10, 13, (hours + minutes) * 0.2, seconds * 0.2, 0.1, 0.1, 0x88880099);
+
+            level = pony.getCorruption().get();
+            seconds = level % 16;
+            minutes = (level / 16) % 16;
+            hours = level / 32;
+
+            DrawableUtil.drawNotchedArc(matrices, 7, 10,  DrawableUtil.PI, hours * 0.2, 0.1, 0.1, 0x000088FF);
+            DrawableUtil.drawNotchedArc(matrices, 7, 10, hours * 0.2 + DrawableUtil.PI, minutes * 0.2, 0.1, 0.1, 0x000088AA);
+            DrawableUtil.drawNotchedArc(matrices, 7, 10, (hours + minutes) * 0.2 + DrawableUtil.PI, seconds * 0.2, 0.1, 0.1, 0x00008899);
+
+            if (canUseSuper) {
+                renderRing(matrices, 17, 13, Math.min(arcBegin, DrawableUtil.PI), Math.max(DrawableUtil.PI, DrawableUtil.TAU - arcBegin), mana.getCharge(), 0x88FF9999, tickDelta);
+            }
 
             double cost = abilities.getStats().stream()
                     .mapToDouble(s -> s.getCost(Unicopia.getConfig().hudPage.get()))
@@ -53,28 +77,25 @@ class ManaRingSlot extends Slot {
 
                 double angle = cost * Math.PI * 2;
 
-                DrawableUtil.drawArc(matrices, 13, 17, arcBegin - angle, angle, color, false);
+                DrawableUtil.drawArc(matrices, 13, 17, arcBegin - angle, angle, color);
             }
         }
 
-        arcBegin = renderRing(matrices, 17, 13, arcBegin, mana.getExhaustion(), 0xFF002299, tickDelta);
-
         matrices.pop();
-
         super.renderContents(context, abilities, bSwap, tickDelta);
     }
 
-    private double renderRing(MatrixStack matrices, double outerRadius, double innerRadius, double offsetAngle, Bar bar, int color, float tickDelta) {
-        double fill = bar.getPercentFill(tickDelta) * DrawableUtil.TAU;
-        double shadow = bar.getShadowFill(tickDelta) * DrawableUtil.TAU;
+    private double renderRing(MatrixStack matrices, double outerRadius, double innerRadius, double offsetAngle, double maxAngle, Bar bar, int color, float tickDelta) {
+        double fill = bar.getPercentFill(tickDelta) * maxAngle;
+        double shadow = bar.getShadowFill(tickDelta) * maxAngle;
 
-        DrawableUtil.drawArc(matrices, innerRadius, outerRadius, offsetAngle, fill, color, true);
+        DrawableUtil.drawArc(matrices, innerRadius, outerRadius, offsetAngle, fill, color);
 
         if (shadow > fill) {
             color = (color & 0xFFFFFF00)
                  | ((color & 0x000000FF) / 2);
 
-            DrawableUtil.drawArc(matrices, innerRadius, outerRadius, offsetAngle + fill, shadow - fill, color, false);
+            DrawableUtil.drawArc(matrices, innerRadius, outerRadius, offsetAngle + fill, shadow - fill, color);
         }
         return offsetAngle + fill;
     }

src/main/java/com/minelittlepony/unicopia/client/gui/Slot.java

@@ -89,10 +89,15 @@ class Slot {
             bSwap &= abilities.isFilled(bSlot);
         }
 
+        int page = Unicopia.getConfig().hudPage.get();
         AbilityDispatcher.Stat stat = abilities.getStat(bSwap ? bSlot : aSlot);
 
-        if (stat.getAbility(Unicopia.getConfig().hudPage.get()).isEmpty()) {
-            return;
+        if (stat.getAbility(page).isEmpty()) {
+            if (aSlot != AbilitySlot.PRIMARY
+                    || (!abilities.getStat(AbilitySlot.SECONDARY).getAbility(page).isEmpty()
+                    && !abilities.getStat(AbilitySlot.TERTIARY).getAbility(page).isEmpty())) {
+                return;
+            }
         }
 
         RenderSystem.setShaderColor(1, 1, 1, 1);
@@ -104,8 +109,6 @@ class Slot {
         // background
         context.drawTexture(UHud.HUD_TEXTURE, 0, 0, backgroundU, backgroundV, size, size, 128, 128);
 
-
-
         int iconPosition = ((size - iconSize + slotPadding + 1) / 2);
         int sz = iconSize - slotPadding;
         uHud.renderAbilityIcon(context, stat, iconPosition, iconPosition, sz, sz, sz, sz);

src/main/java/com/minelittlepony/unicopia/client/gui/SpellIconRenderer.java

@@ -33,13 +33,13 @@ public interface SpellIconRenderer {
             int color = spell.type().getColor() | 0x000000FF;
             double radius = (1.5F + Math.sin(client.player.age / 9D) / 4) * ringScale;
 
-            DrawableUtil.drawArc(modelStack, radius, radius + 3, 0, DrawableUtil.TAU, color & 0xFFFFFF2F, false);
-            DrawableUtil.drawArc(modelStack, radius + 3, radius + 4, 0, DrawableUtil.TAU, color & 0xFFFFFFAF, false);
-            pony.getSpellSlot().get(spell.and(SpellPredicate.IS_TIMED), false).map(TimedSpell::getTimer).ifPresent(timer -> {
-                DrawableUtil.drawArc(modelStack, radius, radius + 3, 0, DrawableUtil.TAU * timer.getPercentTimeRemaining(client.getTickDelta()), 0xFFFFFFFF, false);
+            DrawableUtil.drawArc(modelStack, radius, radius + 3, 0, DrawableUtil.TAU, color & 0xFFFFFF2F);
+            DrawableUtil.drawArc(modelStack, radius + 3, radius + 4, 0, DrawableUtil.TAU, color & 0xFFFFFFAF);
+            pony.getSpellSlot().get(spell.and(SpellPredicate.IS_TIMED)).map(TimedSpell::getTimer).ifPresent(timer -> {
+                DrawableUtil.drawArc(modelStack, radius, radius + 3, 0, DrawableUtil.TAU * timer.getPercentTimeRemaining(client.getTickDelta()), 0xFFFFFFFF);
             });
 
-            long count = pony.getSpellSlot().stream(spell, false).count();
+            long count = pony.getSpellSlot().stream(spell).count();
             if (count > 1) {
                 modelStack.push();
                 modelStack.translate(1, 1, 900);

src/main/java/com/minelittlepony/unicopia/client/gui/UHud.java

@@ -101,7 +101,7 @@ public class UHud {
         float flapCooldown = pony.getPhysics().getFlapCooldown(tickDelta);
         if (flapCooldown > 0) {
             float angle = MathHelper.TAU * flapCooldown;
-            DrawableUtil.drawArc(context.getMatrices(), 3, 6, -angle / 2F, angle, 0x888888AF, false);
+            DrawableUtil.drawArc(context.getMatrices(), 3, 6, -angle / 2F, angle, 0x888888AF);
         }
 
         matrices.pop();
@@ -205,7 +205,7 @@ public class UHud {
             context.fill(RenderLayers.getEndPortal(), 0, 0, scaledWidth, scaledHeight, 0);
             context.getMatrices().push();
             context.getMatrices().translate(scaledWidth / 2, scaledHeight / 2, 0);
-            DrawableUtil.drawArc(context.getMatrices(), 0, 20, 0, MathHelper.TAU, 0x000000FF, false);
+            DrawableUtil.drawArc(context.getMatrices(), 0, 20, 0, MathHelper.TAU, 0x000000FF);
             context.getMatrices().pop();
             return;
         } else if (vortexDistortion > 0) {
@@ -214,8 +214,8 @@ public class UHud {
 
         boolean hasEffect = client.player.hasStatusEffect(UEffects.SUN_BLINDNESS);
 
-        ItemStack glasses = GlassesItem.getForEntity(client.player);
-        boolean hasSunglasses = glasses.getItem() == UItems.SUNGLASSES;
+        ItemStack glasses = GlassesItem.getForEntity(client.player).stack();
+        boolean hasSunglasses = glasses.isOf(UItems.SUNGLASSES);
 
         if (hasEffect || (!hasSunglasses && pony.getObservedSpecies() == Race.BAT && SunBlindnessStatusEffect.hasSunExposure(client.player))) {
             float i = hasEffect ? (client.player.getStatusEffect(UEffects.SUN_BLINDNESS).getDuration() - tickDelta) / SunBlindnessStatusEffect.MAX_DURATION : 0;

src/main/java/com/minelittlepony/unicopia/client/gui/spellbook/IngredientTree.java

@@ -18,6 +18,8 @@ import net.minecraft.client.gui.DrawContext;
 import net.minecraft.client.item.TooltipContext;
 import net.minecraft.client.render.*;
 import com.minelittlepony.unicopia.client.render.RenderLayers;
+import com.minelittlepony.unicopia.container.SpellbookState;
+
 import net.minecraft.client.render.item.ItemRenderer;
 import net.minecraft.client.render.model.json.ModelTransformationMode;
 import net.minecraft.client.util.math.MatrixStack;
@@ -324,7 +326,7 @@ public class IngredientTree implements SpellbookRecipe.CraftingTreeBuilder {
         @Override
         public void onClick() {
             if (MinecraftClient.getInstance().currentScreen instanceof SpellbookScreen spellbook) {
-                spellbook.getState().setCurrentPageId(SpellbookChapterList.TRAIT_DEX_ID);
+                spellbook.getState().setCurrentPageId(SpellbookState.TRAIT_DEX_ID);
                 spellbook.getTraitDex().pageTo(spellbook, trait);
             }
         }

src/main/java/com/minelittlepony/unicopia/client/gui/spellbook/SpellbookChapterList.java

@@ -6,16 +6,10 @@ import java.util.stream.Stream;
 
 import com.minelittlepony.common.client.gui.IViewRoot;
 import com.minelittlepony.unicopia.Debug;
-import com.minelittlepony.unicopia.Unicopia;
-
 import net.minecraft.client.gui.DrawContext;
 import net.minecraft.util.Identifier;
 
 public class SpellbookChapterList {
-    public static final Identifier CRAFTING_ID = Unicopia.id("crafting");
-    public static final Identifier PROFILE_ID = Unicopia.id("profile");
-    public static final Identifier TRAIT_DEX_ID = Unicopia.id("traits");
-
     private final SpellbookScreen screen;
 
     private final Chapter craftingChapter;
@@ -73,10 +67,6 @@ public class SpellbookChapterList {
 
         default void copyStateFrom(Content old) {}
 
-        default boolean showInventory() {
-            return false;
-        }
-
         default Identifier getIcon(Chapter chapter, Identifier icon) {
             return icon;
         }

src/main/java/com/minelittlepony/unicopia/client/gui/spellbook/SpellbookCraftingPageContent.java

@@ -59,11 +59,6 @@ public class SpellbookCraftingPageContent extends ScrollContainer implements Spe
         init(this::initPageContent);
     }
 
-    @Override
-    public boolean showInventory() {
-        return state.getOffset() == 0;
-    }
-
     private void initPageContent() {
         getContentPadding().setVertical(10);
         getContentPadding().bottom = 30;

src/main/java/com/minelittlepony/unicopia/client/gui/spellbook/SpellbookProfilePageContent.java

@@ -58,11 +58,6 @@ public class SpellbookProfilePageContent implements SpellbookChapterList.Content
         }
     }
 
-    @Override
-    public boolean showInventory() {
-        return true;
-    }
-
     @Override
     public void draw(DrawContext context, int mouseX, int mouseY, IViewRoot container) {
 
@@ -110,13 +105,13 @@ public class SpellbookProfilePageContent implements SpellbookChapterList.Content
         int color = 0x10404000 | alpha;
         int xpColor = 0xAA0040FF | ((int)((0.3F + 0.7F * xpPercentage) * 0xFF) & 0xFF) << 16;
         int manaColor = 0xFF00F040;
-        if (pony.getSpellSlot().get(SpellPredicate.IS_CORRUPTING, false).isPresent()) {
+        if (pony.getSpellSlot().get(SpellPredicate.IS_CORRUPTING).isPresent()) {
             manaColor = ColorHelper.lerp(Math.abs(MathHelper.sin(pony.asEntity().age / 15F)), manaColor, 0xFF0030F0);
         }
         manaColor |= (int)((0.3F + 0.7F * alphaF) * 0x40) << 16;
 
-        DrawableUtil.drawArc(matrices, 0, radius + 24, 0, DrawableUtil.TAU, color, false);
-        DrawableUtil.drawArc(matrices, radius / 3, radius + 6, 0, DrawableUtil.TAU, color, false);
+        DrawableUtil.drawArc(matrices, 0, radius + 24, 0, DrawableUtil.TAU, color);
+        DrawableUtil.drawArc(matrices, radius / 3, radius + 6, 0, DrawableUtil.TAU, color);
 
         if (currentLevel >= pony.getLevel().getMax()) {
             int rayCount = 6;
@@ -134,14 +129,14 @@ public class SpellbookProfilePageContent implements SpellbookChapterList.Content
                 double rad = (radius + glowSize) * 0.8F + growth - (i % 2) * 5;
                 float rot = (rotate + raySeparation * i) % MathHelper.TAU;
 
-                DrawableUtil.drawArc(matrices, 0, rad, rot, 0.2F, bandAColor, false);
-                DrawableUtil.drawArc(matrices, 0, rad + 0.3F, rot + 0.37F, 0.25F, bandBColor, false);
+                DrawableUtil.drawArc(matrices, 0, rad, rot, 0.2F, bandAColor);
+                DrawableUtil.drawArc(matrices, 0, rad + 0.3F, rot + 0.37F, 0.25F, bandBColor);
             }
         }
 
-        DrawableUtil.drawArc(matrices, radius / 3, radius + 6, 0, xpPercentage * DrawableUtil.TAU, xpColor, false);
+        DrawableUtil.drawArc(matrices, radius / 3, radius + 6, 0, xpPercentage * DrawableUtil.TAU, xpColor);
         radius += 8;
-        DrawableUtil.drawArc(matrices, radius, radius + 6 + growth, 0, manaPercentage * DrawableUtil.TAU, manaColor, false);
+        DrawableUtil.drawArc(matrices, radius, radius + 6 + growth, 0, manaPercentage * DrawableUtil.TAU, manaColor);
 
         String manaString = (int)reserves.getMana().get() + "/" + (int)reserves.getMana().getMax();
 

src/main/java/com/minelittlepony/unicopia/client/gui/spellbook/SpellbookScreen.java

@@ -14,7 +14,6 @@ import com.minelittlepony.unicopia.Debug;
 import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.CustomisedSpellType;
-import com.minelittlepony.unicopia.client.TextHelper;
 import com.minelittlepony.unicopia.client.gui.*;
 import com.minelittlepony.unicopia.client.gui.spellbook.SpellbookChapterList.*;
 import com.minelittlepony.unicopia.compat.trinkets.TrinketSlotBackSprites;
@@ -52,12 +51,11 @@ public class SpellbookScreen extends HandledScreen<SpellbookScreenHandler> imple
 
     private final RecipeBookWidget recipeBook = new RecipeBookWidget();
 
-    private final Chapter craftingChapter;
     private final SpellbookTraitDexPageContent traitDex = new SpellbookTraitDexPageContent(this);
     private final SpellbookChapterList chapters = new SpellbookChapterList(this,
-        craftingChapter = new Chapter(SpellbookChapterList.CRAFTING_ID, TabSide.LEFT, 0, 0, Optional.of(new SpellbookCraftingPageContent(this))),
-        new Chapter(SpellbookChapterList.PROFILE_ID, TabSide.LEFT, 1, 0, Optional.of(new SpellbookProfilePageContent(this))),
-        new Chapter(SpellbookChapterList.TRAIT_DEX_ID, TabSide.LEFT, 3, 0, Optional.of(traitDex))
+        new Chapter(SpellbookState.CRAFTING_ID, TabSide.LEFT, 0, 0, Optional.of(new SpellbookCraftingPageContent(this))),
+        new Chapter(SpellbookState.PROFILE_ID, TabSide.LEFT, 1, 0, Optional.of(new SpellbookProfilePageContent(this))),
+        new Chapter(SpellbookState.TRAIT_DEX_ID, TabSide.LEFT, 3, 0, Optional.of(traitDex))
     );
     private final SpellbookTabBar tabs = new SpellbookTabBar(this, chapters);
 
@@ -68,13 +66,6 @@ public class SpellbookScreen extends HandledScreen<SpellbookScreenHandler> imple
         backgroundWidth = 405;
         backgroundHeight = 219;
         contentBounds = new Bounds(CONTENT_PADDING, CONTENT_PADDING, backgroundWidth - CONTENT_PADDING * 2, backgroundHeight - CONTENT_PADDING * 3 - 2);
-
-        handler.addSlotShowingCondition(slotType -> {
-            if (slotType == SlotType.INVENTORY) {
-                return chapters.getCurrentChapter().content().filter(Content::showInventory).isPresent();
-            }
-            return chapters.getCurrentChapter() == craftingChapter;
-        });
         handler.getSpellbookState().setSynchronizer(state -> {
             Channel.CLIENT_SPELLBOOK_UPDATE.sendToServer(MsgSpellbookStateChanged.create(handler, state));
         });
@@ -218,8 +209,7 @@ public class SpellbookScreen extends HandledScreen<SpellbookScreenHandler> imple
 
         List<Text> tooltip = new ArrayList<>();
         tooltip.add(spell.type().getName());
-        tooltip.addAll(TextHelper.wrap(Text.translatable(spell.type().getTranslationKey() + ".lore").formatted(spell.type().getAffinity().getColor()), 180).toList());
-
+        spell.appendTooltip(tooltip);
 
         context.drawTooltip(textRenderer, tooltip, x, y);
         context.getMatrices().pop();

src/main/java/com/minelittlepony/unicopia/client/gui/spellbook/SpellbookTraitDexPageContent.java

@@ -73,7 +73,7 @@ public class SpellbookTraitDexPageContent implements SpellbookChapterList.Conten
             return;
         }
         page /= 2;
-        state = screen.getState().getState(SpellbookChapterList.TRAIT_DEX_ID);
+        state = screen.getState().getState(SpellbookState.TRAIT_DEX_ID);
         state.setOffset(page);
         leftPage.verticalScrollbar.scrollBy(leftPage.verticalScrollbar.getScrubber().getPosition());
         rightPage.verticalScrollbar.scrollBy(rightPage.verticalScrollbar.getScrubber().getPosition());
@@ -84,7 +84,7 @@ public class SpellbookTraitDexPageContent implements SpellbookChapterList.Conten
 
     @Override
     public void onRecipesChanged() {
-        init(screen, SpellbookChapterList.TRAIT_DEX_ID);
+        init(screen, SpellbookState.TRAIT_DEX_ID);
     }
 
     private final class DexPage extends ScrollContainer {

src/main/java/com/minelittlepony/unicopia/client/minelittlepony/AmuletGear.java

@@ -30,7 +30,7 @@ class AmuletGear extends AmuletModel implements Gear {
 
     @Override
     public boolean canRender(PonyModel<?> model, Entity entity) {
-        return entity instanceof LivingEntity living && !AmuletItem.getForEntity(living).isEmpty();
+        return entity instanceof LivingEntity living && !AmuletItem.get(living).stack().isEmpty();
     }
 
     @Override
@@ -40,7 +40,7 @@ class AmuletGear extends AmuletModel implements Gear {
 
     @Override
     public <T extends Entity> Identifier getTexture(T entity, Context<T, ?> context) {
-        return textures.computeIfAbsent(Registries.ITEM.getId(AmuletItem.getForEntity((LivingEntity)entity).getItem()), id -> new Identifier(id.getNamespace(), "textures/models/armor/" + id.getPath() + ".png"));
+        return textures.computeIfAbsent(Registries.ITEM.getId(AmuletItem.get((LivingEntity)entity).stack().getItem()), id -> new Identifier(id.getNamespace(), "textures/models/armor/" + id.getPath() + ".png"));
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/client/minelittlepony/BangleGear.java

@@ -67,8 +67,8 @@ class BangleGear implements Gear {
     public void pose(PonyModel<?> model, Entity entity, boolean rainboom, UUID interpolatorId, float move, float swing, float bodySwing, float ticks) {
         alex = entity instanceof ClientPlayerEntity && ((ClientPlayerEntity)entity).getSkinTextures().model() == Model.SLIM;
         FriendshipBraceletItem.getWornBangles((LivingEntity)entity, slot).findFirst().ifPresent(bracelet -> {
-            color = ((DyeableItem)bracelet.getItem()).getColor(bracelet);
-            glowing = ((GlowableItem)bracelet.getItem()).isGlowing(bracelet);
+            color = ((DyeableItem)bracelet.stack().getItem()).getColor(bracelet.stack());
+            glowing = ((GlowableItem)bracelet.stack().getItem()).isGlowing(bracelet.stack());
         });
         BraceletModel m = alex ? alexModel : steveModel;
 
@@ -76,7 +76,7 @@ class BangleGear implements Gear {
             m.setAngles(biped);
         }
         Arm mainArm = ((LivingEntity)entity).getMainArm();
-        m.setVisible(slot == TrinketsDelegate.MAINHAND ? mainArm : mainArm.getOpposite());
+        m.setVisible(slot == TrinketsDelegate.MAIN_GLOVE ? mainArm : mainArm.getOpposite());
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/client/minelittlepony/GlassesGear.java

@@ -28,7 +28,7 @@ class GlassesGear extends GlassesModel implements Gear {
 
     @Override
     public boolean canRender(PonyModel<?> model, Entity entity) {
-        return entity instanceof LivingEntity living && !GlassesItem.getForEntity(living).isEmpty();
+        return entity instanceof LivingEntity living && !GlassesItem.getForEntity(living).stack().isEmpty();
     }
 
     @Override
@@ -38,7 +38,7 @@ class GlassesGear extends GlassesModel implements Gear {
 
     @Override
     public <T extends Entity> Identifier getTexture(T entity, Context<T, ?> context) {
-        return textures.computeIfAbsent(Registries.ITEM.getId(GlassesItem.getForEntity((LivingEntity)entity).getItem()), id -> new Identifier(id.getNamespace(), "textures/models/armor/" + id.getPath() + ".png"));
+        return textures.computeIfAbsent(Registries.ITEM.getId(GlassesItem.getForEntity((LivingEntity)entity).stack().getItem()), id -> new Identifier(id.getNamespace(), "textures/models/armor/" + id.getPath() + ".png"));
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/client/minelittlepony/Main.java

@@ -43,8 +43,8 @@ public class Main extends MineLPDelegate implements ClientModInitializer {
     public void onInitializeClient() {
         INSTANCE = this;
         PonyModelPrepareCallback.EVENT.register(this::onPonyModelPrepared);
-        Gear.register(() -> new BangleGear(TrinketsDelegate.MAINHAND));
-        Gear.register(() -> new BangleGear(TrinketsDelegate.OFFHAND));
+        Gear.register(() -> new BangleGear(TrinketsDelegate.MAIN_GLOVE));
+        Gear.register(() -> new BangleGear(TrinketsDelegate.SECONDARY_GLOVE));
         Gear.register(HeldEntityGear::new);
         Gear.register(BodyPartGear::pegasusWings);
         Gear.register(BodyPartGear::batWings);

src/main/java/com/minelittlepony/unicopia/client/particle/WindParticle.java

@@ -89,7 +89,8 @@ public class WindParticle extends AbstractBillboardParticle {
             trail.update(new Vec3d(x + cos, y + sin, z - cos));
         } else {
             if (target != null && target.isAlive()) {
-                trail.update(target.getPos().add(offset).add(cos, sin, -cos));
+
+                trail.update(target.getPos().add(target.getRotationVecClient().multiply(-7)).add(offset).add(cos, sin, -cos));
 
                 if (attachmentTicks > 0 && --attachmentTicks <= 0) {
                     target = null;

src/main/java/com/minelittlepony/unicopia/client/render/AmuletFeatureRenderer.java

@@ -42,7 +42,7 @@ public class AmuletFeatureRenderer<E extends LivingEntity> implements AccessoryF
     @Override
     public void render(MatrixStack matrices, VertexConsumerProvider renderContext, int lightUv, E entity, float limbDistance, float limbAngle, float tickDelta, float age, float headYaw, float headPitch) {
 
-        ItemStack stack = AmuletItem.getForEntity(entity);
+        ItemStack stack = AmuletItem.get(entity).stack();
 
         if (!stack.isEmpty()) {
             Identifier texture = textures.computeIfAbsent(Registries.ITEM.getId(stack.getItem()), id -> new Identifier(id.getNamespace(), "textures/models/armor/" + id.getPath() + ".png"));

src/main/java/com/minelittlepony/unicopia/client/render/BraceletFeatureRenderer.java

@@ -49,11 +49,11 @@ public class BraceletFeatureRenderer<E extends LivingEntity> implements Accessor
 
     @Override
     public void render(MatrixStack stack, VertexConsumerProvider renderContext, int lightUv, E entity, float limbDistance, float limbAngle, float tickDelta, float age, float headYaw, float headPitch) {
-        FriendshipBraceletItem.getWornBangles(entity, TrinketsDelegate.MAINHAND).findFirst().ifPresent(bangle -> {
-            renderBangleThirdPerson(bangle, stack, renderContext, lightUv, entity, limbDistance, limbAngle, tickDelta, age, headYaw, headPitch, entity.getMainArm());
+        FriendshipBraceletItem.getWornBangles(entity, TrinketsDelegate.MAIN_GLOVE).findFirst().ifPresent(bangle -> {
+            renderBangleThirdPerson(bangle.stack(), stack, renderContext, lightUv, entity, limbDistance, limbAngle, tickDelta, age, headYaw, headPitch, entity.getMainArm());
         });
-        FriendshipBraceletItem.getWornBangles(entity, TrinketsDelegate.OFFHAND).findFirst().ifPresent(bangle -> {
-            renderBangleThirdPerson(bangle, stack, renderContext, lightUv, entity, limbDistance, limbAngle, tickDelta, age, headYaw, headPitch, entity.getMainArm().getOpposite());
+        FriendshipBraceletItem.getWornBangles(entity, TrinketsDelegate.SECONDARY_GLOVE).findFirst().ifPresent(bangle -> {
+            renderBangleThirdPerson(bangle.stack(), stack, renderContext, lightUv, entity, limbDistance, limbAngle, tickDelta, age, headYaw, headPitch, entity.getMainArm().getOpposite());
         });
     }
 
@@ -83,14 +83,14 @@ public class BraceletFeatureRenderer<E extends LivingEntity> implements Accessor
 
     @Override
     public void renderArm(MatrixStack stack, VertexConsumerProvider renderContext, int lightUv, E entity, ModelPart armModel, Arm side) {
-        FriendshipBraceletItem.getWornBangles(entity, side == entity.getMainArm() ? TrinketsDelegate.MAINHAND : TrinketsDelegate.OFFHAND).findFirst().ifPresent(item -> {
-            int j = ((DyeableItem)item.getItem()).getColor(item);
+        FriendshipBraceletItem.getWornBangles(entity, side == entity.getMainArm() ? TrinketsDelegate.MAIN_GLOVE : TrinketsDelegate.SECONDARY_GLOVE).findFirst().ifPresent(item -> {
+            int j = ((DyeableItem)item.stack().getItem()).getColor(item.stack());
 
             boolean alex = entity instanceof ClientPlayerEntity && ((ClientPlayerEntity)entity).getSkinTextures().model() == SkinTextures.Model.SLIM;
 
             BraceletModel model = alex ? alexModel : steveModel;
 
-            boolean glowing = ((GlowableItem)item.getItem()).isGlowing(item);
+            boolean glowing = ((GlowableItem)item.stack().getItem()).isGlowing(item.stack());
 
             if (MineLPDelegate.getInstance().getPlayerPonyRace((ClientPlayerEntity)entity).isEquine()) {
                 stack.translate(side == Arm.LEFT ? 0.06 : -0.06, 0.3, 0);

src/main/java/com/minelittlepony/unicopia/client/render/DisguisedArmsFeatureRenderer.java

@@ -114,7 +114,7 @@ public class DisguisedArmsFeatureRenderer<E extends LivingEntity> implements Acc
     }
 
     private Entity getAppearance(E entity) {
-        return Caster.of(entity).flatMap(caster -> caster.getSpellSlot().get(SpellPredicate.IS_DISGUISE, false)).map(Disguise.class::cast)
+        return Caster.of(entity).flatMap(caster -> caster.getSpellSlot().get(SpellPredicate.IS_DISGUISE)).map(Disguise.class::cast)
                 .flatMap(Disguise::getAppearance)
                 .map(EntityAppearance::getAppearance)
                 .orElse(null);

src/main/java/com/minelittlepony/unicopia/client/render/EntityDisguiseRenderer.java

@@ -9,20 +9,19 @@ import com.minelittlepony.unicopia.entity.behaviour.Disguise;
 import com.minelittlepony.unicopia.entity.behaviour.EntityAppearance;
 import com.minelittlepony.unicopia.mixin.MixinBlockEntity;
 
-import net.minecraft.block.BlockState;
+import net.minecraft.block.BlockRenderType;
 import net.minecraft.block.entity.BlockEntity;
 import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.render.OverlayTexture;
 import net.minecraft.client.render.VertexConsumerProvider;
 import net.minecraft.client.render.block.entity.BlockEntityRenderer;
+import net.minecraft.client.render.entity.EntityRenderDispatcher;
 import net.minecraft.client.render.entity.LivingEntityRenderer;
 import net.minecraft.client.render.entity.model.BipedEntityModel;
 import net.minecraft.client.util.math.MatrixStack;
 import net.minecraft.entity.Entity;
-import net.minecraft.state.property.Properties;
-import net.minecraft.util.math.Direction;
+import net.minecraft.entity.FallingBlockEntity;
 import net.minecraft.util.math.MathHelper;
-import net.minecraft.util.math.RotationAxis;
 import net.minecraft.util.math.Vec3d;
 
 class EntityDisguiseRenderer {
@@ -37,7 +36,9 @@ class EntityDisguiseRenderer {
             double x, double y, double z,
             float tickDelta, MatrixStack matrices, VertexConsumerProvider vertices, int light) {
         int fireTicks = pony.asEntity().doesRenderOnFire() ? 1 : 0;
-        disguise.update(pony, false);
+        if (!delegate.client.isPaused()) {
+            disguise.update(pony, false);
+        }
 
         EntityAppearance ve = disguise.getDisguise();
         Entity e = ve.getAppearance();
@@ -53,11 +54,11 @@ class EntityDisguiseRenderer {
         }
 
         render(ve, e, x, y, z, fireTicks, tickDelta, matrices, vertices, light);
-        ve.getAttachments().forEach(ee -> {
-            PehkUtil.copyScale(pony.asEntity(), ee);
-            Vec3d difference = ee.getPos().subtract(e.getPos());
-            render(ve, ee, x + difference.x, y + difference.y, z + difference.z, fireTicks, tickDelta, matrices, vertices, light);
-            PehkUtil.clearScale(ee);
+        ve.getAttachments().forEach(attachment -> {
+            PehkUtil.copyScale(pony.asEntity(), attachment.entity());
+            Vec3d difference = attachment.entity().getPos().subtract(e.getPos());
+            render(ve, attachment.entity(), x + difference.x, y + difference.y, z + difference.z, fireTicks, tickDelta, matrices, vertices, light);
+            PehkUtil.clearScale(attachment.entity());
         });
 
         matrices.push();
@@ -70,6 +71,7 @@ class EntityDisguiseRenderer {
         return true;
     }
 
+    @SuppressWarnings("deprecation")
     private void render(EntityAppearance ve, Entity e,
             double x, double y, double z,
             int fireTicks, float tickDelta, MatrixStack matrices, VertexConsumerProvider vertexConsumers, int light) {
@@ -88,24 +90,22 @@ class EntityDisguiseRenderer {
             BlockEntityRenderer<BlockEntity> r = MinecraftClient.getInstance().getBlockEntityRenderDispatcher().get(blockEntity);
             if (r != null) {
                 ((MixinBlockEntity)blockEntity).setPos(e.getBlockPos());
+                if (e instanceof FallingBlockEntity fbe) {
+                    blockEntity.setCachedState(fbe.getBlockState());
+                }
                 blockEntity.setWorld(e.getWorld());
                 matrices.push();
-
-                BlockState state = blockEntity.getCachedState();
-                Direction direction = state.contains(Properties.HORIZONTAL_FACING) ? state.get(Properties.HORIZONTAL_FACING) : Direction.UP;
-
                 matrices.translate(x, y, z);
-
-                matrices.multiply(direction.getRotationQuaternion());
-                matrices.multiply(RotationAxis.NEGATIVE_X.rotationDegrees(90));
-
                 matrices.translate(-0.5, 0, -0.5);
 
                 r.render(blockEntity, 1, matrices, vertexConsumers, light, OverlayTexture.DEFAULT_UV);
 
                 matrices.pop();
-                blockEntity.setWorld(null);
-                return;
+
+                BlockRenderType type = blockEntity.getCachedState().getRenderType();
+                if (type == BlockRenderType.ENTITYBLOCK_ANIMATED) {
+                    return;
+                }
             }
         }
 
@@ -116,7 +116,15 @@ class EntityDisguiseRenderer {
         }
 
         e.setFireTicks(fireTicks);
-        delegate.client.getEntityRenderDispatcher().render(e, x, y, z, e.getYaw(), tickDelta, matrices, vertexConsumers, light);
+
+        EntityRenderDispatcher dispatcher = delegate.client.getEntityRenderDispatcher();
+        if (e instanceof FallingBlockEntity) {
+            dispatcher.setRenderShadows(false);
+        }
+        dispatcher.render(e, x, y, z, e.getYaw(), tickDelta, matrices, vertexConsumers, light);
+        if (e instanceof FallingBlockEntity) {
+            dispatcher.setRenderShadows(true);
+        }
         e.setFireTicks(0);
 
         if (model != null) {

src/main/java/com/minelittlepony/unicopia/client/render/EntityReplacementManager.java

@@ -51,7 +51,7 @@ class EntityReplacementManager implements Disguise {
             return Optional.of(this);
         }
 
-        return caster.getSpellSlot().get(SpellPredicate.IS_DISGUISE, false).map(Disguise.class::cast);
+        return caster.getSpellSlot().get(SpellPredicate.IS_DISGUISE).map(Disguise.class::cast);
     }
 
     private List<EntityType<?>> getMobTypePool(EntityType<?> type) {

src/main/java/com/minelittlepony/unicopia/client/render/GlassesFeatureRenderer.java

@@ -36,7 +36,7 @@ public class GlassesFeatureRenderer<E extends LivingEntity> implements Accessory
     @Override
     public void render(MatrixStack matrices, VertexConsumerProvider renderContext, int lightUv, E entity, float limbDistance, float limbAngle, float tickDelta, float age, float headYaw, float headPitch) {
 
-        ItemStack stack = GlassesItem.getForEntity(entity);
+        ItemStack stack = GlassesItem.getForEntity(entity).stack();
 
         if (!stack.isEmpty()) {
             Identifier texture = textures.computeIfAbsent(Registries.ITEM.getId(stack.getItem()), id -> new Identifier(id.getNamespace(), "textures/models/armor/" + id.getPath() + ".png"));

src/main/java/com/minelittlepony/unicopia/client/render/HornFeatureRenderer.java

@@ -3,7 +3,7 @@ package com.minelittlepony.unicopia.client.render;
 import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.ability.AbilityDispatcher.Stat;
-import com.minelittlepony.unicopia.ability.magic.SpellPredicate;
+import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
 
 import net.minecraft.client.model.Dilation;
 import net.minecraft.client.model.Model;
@@ -55,7 +55,9 @@ public class HornFeatureRenderer<E extends LivingEntity> implements AccessoryFea
                 return pony.getAbilities().getActiveStat()
                         .flatMap(Stat::getActiveAbility)
                         .map(ability -> ability.getColor(pony))
-                        .filter(i -> i != -1).or(() -> pony.getSpellSlot().get(SpellPredicate.IS_NOT_PLACED, false).map(spell -> spell.getType().getColor()));
+                        .filter(i -> i != -1).or(() -> pony.getSpellSlot()
+                                .get(SpellType.PLACE_CONTROL_SPELL.negate())
+                                .map(spell -> spell.getTypeAndTraits().type().getColor()));
             }).ifPresent(color -> {
                 model.setState(true);
                 model.render(stack, ItemRenderer.getArmorGlintConsumer(renderContext, RenderLayers.getMagicColored((0x99 << 24) | color), false, false), lightUv, OverlayTexture.DEFAULT_UV, 1, 1, 1, 1);

src/main/java/com/minelittlepony/unicopia/client/render/PlayerPoser.java

@@ -43,7 +43,7 @@ public class PlayerPoser {
         boolean liftLeftArm = mainArm == Arm.LEFT || !ponyRace.isEquine();
         boolean liftRightArm = mainArm == Arm.RIGHT || !ponyRace.isEquine();
 
-        ItemStack glasses = GlassesItem.getForEntity(player);
+        ItemStack glasses = GlassesItem.getForEntity(player).stack();
         ModelPart head = model.getHead();
 
         if (context == Context.THIRD_PERSON && !player.isSneaking()) {

src/main/java/com/minelittlepony/unicopia/client/render/entity/CastSpellEntityRenderer.java

@@ -1,16 +1,35 @@
 package com.minelittlepony.unicopia.client.render.entity;
 
+import org.jetbrains.annotations.Nullable;
+
+import com.minelittlepony.common.util.Color;
+import com.minelittlepony.unicopia.Unicopia;
+import com.minelittlepony.unicopia.ability.magic.spell.Spell;
+import com.minelittlepony.unicopia.client.render.model.PlaneModel;
 import com.minelittlepony.unicopia.client.render.spell.SpellEffectsRenderDispatcher;
+import com.minelittlepony.unicopia.client.render.spell.SpellRenderer;
 import com.minelittlepony.unicopia.entity.mob.CastSpellEntity;
 
+import net.minecraft.client.render.RenderLayer;
+import net.minecraft.client.render.VertexConsumer;
 import net.minecraft.client.render.VertexConsumerProvider;
 import net.minecraft.client.render.entity.EntityRenderer;
 import net.minecraft.client.render.entity.EntityRendererFactory;
 import net.minecraft.client.util.math.MatrixStack;
 import net.minecraft.screen.PlayerScreenHandler;
 import net.minecraft.util.Identifier;
+import net.minecraft.util.math.RotationAxis;
 
 public class CastSpellEntityRenderer extends EntityRenderer<CastSpellEntity> {
+    private static final Identifier[] TEXTURES = new Identifier[] {
+            Unicopia.id("textures/particles/runes_0.png"),
+            Unicopia.id("textures/particles/runes_1.png"),
+            Unicopia.id("textures/particles/runes_2.png"),
+            Unicopia.id("textures/particles/runes_3.png"),
+            Unicopia.id("textures/particles/runes_4.png"),
+            Unicopia.id("textures/particles/runes_5.png")
+    };
+
     public CastSpellEntityRenderer(EntityRendererFactory.Context ctx) {
         super(ctx);
     }
@@ -21,11 +40,62 @@ public class CastSpellEntityRenderer extends EntityRenderer<CastSpellEntity> {
     }
 
     @Override
-    public void render(CastSpellEntity entity, float yaw, float tickDelta, MatrixStack matrices, VertexConsumerProvider vertexConsumers, int light) {
-        SpellEffectsRenderDispatcher.INSTANCE.render(matrices, vertexConsumers, light, entity, 0, 0, tickDelta, getAnimationProgress(entity, tickDelta), yaw, 0);
+    public void render(CastSpellEntity entity, float yaw, float tickDelta, MatrixStack matrices, VertexConsumerProvider vertices, int light) {
+        matrices.push();
+        matrices.translate(0, 0.001, 0);
+        final float height = entity.getHeight();
+        final float pitch = entity.getPitch(tickDelta);
+        matrices.translate(0, (-pitch / 90F) * height * 0.5F, 0);
+        matrices.multiply(RotationAxis.POSITIVE_Y.rotationDegrees(yaw));
+        matrices.multiply(RotationAxis.POSITIVE_X.rotationDegrees(-pitch));
+
+        float animationProgress = getAnimationProgress(entity, tickDelta);
+        renderAmbientEffects(matrices, vertices, entity, entity.getSpellSlot().get().orElse(null), light, animationProgress, tickDelta);
+        SpellEffectsRenderDispatcher.INSTANCE.render(matrices, vertices, light, entity, entity.getScale(tickDelta), 0, tickDelta, animationProgress, yaw, pitch);
+
+        matrices.pop();
     }
 
     protected float getAnimationProgress(CastSpellEntity entity, float tickDelta) {
         return entity.age + tickDelta;
     }
+
+    protected void renderAmbientEffects(MatrixStack matrices, VertexConsumerProvider vertices, CastSpellEntity entity, @Nullable Spell spell, int light, float animationProgress, float tickDelta) {
+        matrices.push();
+        matrices.multiply(RotationAxis.POSITIVE_X.rotationDegrees(90));
+
+        float scale = entity.getScale(tickDelta) * 3;
+        matrices.scale(scale, scale, scale);
+
+        float angle = (animationProgress / 9F) % 360;
+
+        int color = spell == null ? 0 : spell.getTypeAndTraits().type().getColor();
+
+        float red = Color.r(color);
+        float green = Color.g(color);
+        float blue = Color.b(color);
+
+        @Nullable
+        SpellRenderer<?> renderer = spell == null ? null : SpellEffectsRenderDispatcher.INSTANCE.getRenderer(spell);
+
+        for (int i = 0; i < TEXTURES.length; i++) {
+            if (renderer != null && !renderer.shouldRenderEffectPass(i)) {
+                continue;
+            }
+            VertexConsumer buffer = vertices.getBuffer(RenderLayer.getEntityTranslucent(TEXTURES[i]));
+
+            for (int dim = 0; dim < 3; dim++) {
+                float ringSpeed = (i % 2 == 0 ? i : -1) * i;
+
+                matrices.push();
+                matrices.multiply(RotationAxis.POSITIVE_Z.rotationDegrees(angle * ringSpeed));
+                matrices.multiply(RotationAxis.POSITIVE_Y.rotationDegrees(angle * ringSpeed * dim));
+                matrices.multiply(RotationAxis.POSITIVE_X.rotationDegrees(angle * ringSpeed * dim));
+                PlaneModel.INSTANCE.render(matrices, buffer, light, 0, 1, red, green, blue, scale / ((float)(dim * 3) + 1));
+                matrices.pop();
+            }
+        }
+
+        matrices.pop();
+    }
 }

src/main/java/com/minelittlepony/unicopia/client/render/entity/MagicBeamEntityRenderer.java

@@ -56,8 +56,8 @@ public class MagicBeamEntityRenderer extends EntityRenderer<MagicBeamEntity> {
                 -entity.getPitch(tickDelta) * MathHelper.RADIANS_PER_DEGREE
         );
 
-        RenderLayer layer = entity.getSpellSlot().get(true)
-                .map(spell -> (0x99 << 24) | spell.getType().getColor())
+        RenderLayer layer = entity.getSpellSlot().get()
+                .map(spell -> (0x99 << 24) | spell.getTypeAndTraits().type().getColor())
                 .map(RenderLayers::getMagicColored)
                 .orElseGet(RenderLayers::getMagicColored);