Updating to 1.21 (part 3)

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

@@ -1,5 +1,6 @@
 package com.minelittlepony.unicopia;
 
+import net.fabricmc.fabric.api.tag.convention.v2.ConventionalBlockTags;
 import net.minecraft.block.Block;
 import net.minecraft.item.Item;
 import net.minecraft.registry.RegistryKeys;
@@ -9,8 +10,8 @@ import net.minecraft.util.Identifier;
 public interface UConventionalTags {
     interface Blocks {
         TagKey<Block> CONCRETE_POWDERS = block("concrete_powders");
-        TagKey<Block> CONCRETES = block("concretes");
+        TagKey<Block> CONCRETES = ConventionalBlockTags.CONCRETES;
-        TagKey<Block> GLAZED_TERRACOTTAS = block("glazed_terracottas");
+        TagKey<Block> GLAZED_TERRACOTTAS = ConventionalBlockTags.GLAZED_TERRACOTTAS;
         TagKey<Block> CORAL_BLOCKS = block("coral_blocks");
         TagKey<Block> CORAL_FANS = block("coral_fans");
         TagKey<Block> CORALS = block("corals");

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

@@ -1,5 +1,7 @@
 package com.minelittlepony.unicopia;
 
+import net.minecraft.registry.RegistryKey;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.world.World;
 
 public interface WorldConvertable {
@@ -14,4 +16,8 @@ public interface WorldConvertable {
     default boolean isClient() {
         return asWorld().isClient();
     }
+
+    default <T> RegistryEntry<T> entryFor(RegistryKey<T> key) {
+        return asWorld().getRegistryManager().get(key.getRegistryRef()).getEntry(key).orElseThrow();
+    }
 }

src/main/java/com/minelittlepony/unicopia/ability/data/tree/TreeTypeLoader.java

@@ -2,20 +2,21 @@ package com.minelittlepony.unicopia.ability.data.tree;
 
 import java.util.*;
 import java.util.function.Supplier;
-import java.util.stream.Collectors;
-
-import org.jetbrains.annotations.Nullable;
-
 import com.google.gson.JsonElement;
-import com.google.gson.JsonParseException;
 import com.minelittlepony.unicopia.Unicopia;
+import com.minelittlepony.unicopia.util.CodecUtils;
 import com.minelittlepony.unicopia.util.Resources;
 import com.minelittlepony.unicopia.util.Weighted;
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.JsonOps;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
 
 import net.fabricmc.fabric.api.resource.IdentifiableResourceReloadListener;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.resource.JsonDataLoader;
 import net.minecraft.resource.ResourceManager;
 import net.minecraft.util.Identifier;
@@ -45,35 +46,47 @@ public class TreeTypeLoader extends JsonDataLoader implements IdentifiableResour
         return ID;
     }
 
+    @SuppressWarnings("unchecked")
     @Override
     protected void apply(Map<Identifier, JsonElement> resources, ResourceManager manager, Profiler profiler) {
-        entries = resources.entrySet().stream().filter(Objects::nonNull)
+        entries = Map.ofEntries(resources.entrySet().stream()
-                .collect(Collectors.toMap(Map.Entry::getKey, entry -> {
+                .filter(Objects::nonNull)
-            try {
+                .map(entry -> TreeTypeDef.CODEC.decode(JsonOps.INSTANCE, entry.getValue())
-                return Resources.GSON.fromJson(entry.getValue(), TreeTypeDef.class);
+                        .result()
-            } catch (IllegalArgumentException | JsonParseException e) {
+                        .map(p -> p.getFirst())
-                return null;
+                        .map(p -> Map.entry(entry.getKey(), p))
-            }
+                        .orElse(null))
-        }));
+                .filter(Objects::nonNull)
+                .toArray(Map.Entry[]::new));
+
         TreeTypes.load(entries);
     }
 
-    public static final class TreeTypeDef {
+    public record TreeTypeDef (
-        final Set<Identifier> logs;
+            Set<Identifier> logs,
-        final Set<Identifier> leaves;
+            Set<Identifier> leaves,
-        final Set<Drop> drops;
+            Set<Drop> drops,
-        final boolean wideTrunk;
+            boolean wideTrunk,
-        final int rarity;
+            int rarity,
-        final float leavesRatio;
+            float leavesRatio
-
+    ) {
-        public TreeTypeDef(PacketByteBuf buffer) {
+        public static final Codec<TreeTypeDef> CODEC = RecordCodecBuilder.create(instance -> instance.group(
-            logs = new HashSet<>(buffer.readList(PacketByteBuf::readIdentifier));
+                CodecUtils.setOf(Identifier.CODEC).fieldOf("logs").forGetter(TreeTypeDef::logs),
-            leaves = new HashSet<>(buffer.readList(PacketByteBuf::readIdentifier));
+                CodecUtils.setOf(Identifier.CODEC).fieldOf("leaves").forGetter(TreeTypeDef::leaves),
-            drops = new HashSet<>(buffer.readList(Drop::new));
+                CodecUtils.setOf(Drop.CODEC).fieldOf("drops").forGetter(TreeTypeDef::drops),
-            wideTrunk = buffer.readBoolean();
+                Codec.BOOL.fieldOf("wideTrunk").forGetter(TreeTypeDef::wideTrunk),
-            rarity = buffer.readInt();
+                Codec.INT.fieldOf("rarity").forGetter(TreeTypeDef::rarity),
-            leavesRatio = buffer.readFloat();
+                Codec.FLOAT.fieldOf("leavesRatio").forGetter(TreeTypeDef::leavesRatio)
-        }
+        ).apply(instance, TreeTypeDef::new));
+        public static final PacketCodec<RegistryByteBuf, TreeTypeDef> PACKET_CODEC = PacketCodec.tuple(
+                Identifier.PACKET_CODEC.collect(PacketCodecs.toCollection(HashSet::new)), TreeTypeDef::logs,
+                Identifier.PACKET_CODEC.collect(PacketCodecs.toCollection(HashSet::new)), TreeTypeDef::leaves,
+                Drop.PACKET_CODEC.collect(PacketCodecs.toCollection(HashSet::new)), TreeTypeDef::drops,
+                PacketCodecs.BOOL, TreeTypeDef::wideTrunk,
+                PacketCodecs.INTEGER, TreeTypeDef::rarity,
+                PacketCodecs.FLOAT, TreeTypeDef::leavesRatio,
+                TreeTypeDef::new
+        );
 
         public TreeType toTreeType(Identifier id) {
             return new TreeTypeImpl(
@@ -87,35 +100,32 @@ public class TreeTypeLoader extends JsonDataLoader implements IdentifiableResour
             );
         }
 
-        public void write(PacketByteBuf buffer) {
+        static record Drop (
-            buffer.writeCollection(logs, PacketByteBuf::writeIdentifier);
+                int weight,
-            buffer.writeCollection(leaves, PacketByteBuf::writeIdentifier);
+                Optional<Identifier> tag,
-            buffer.writeCollection(drops, (a, b) -> b.write(a));
+                Optional<Identifier> item
-            buffer.writeBoolean(wideTrunk);
+        ) implements Weighted.Buildable<Supplier<ItemStack>> {
-            buffer.writeInt(rarity);
+            public static final Codec<Drop> CODEC = RecordCodecBuilder.create(instance -> instance.group(
-            buffer.writeFloat(leavesRatio);
+                    Codec.INT.fieldOf("weight").forGetter(Drop::weight),
-        }
+                    Identifier.CODEC.optionalFieldOf("tag").forGetter(Drop::tag),
-
+                    Identifier.CODEC.optionalFieldOf("item").forGetter(Drop::item)
-        static class Drop implements Weighted.Buildable<Supplier<ItemStack>> {
+            ).apply(instance, Drop::new));
-            final int weight;
+            public static final PacketCodec<RegistryByteBuf, Drop> PACKET_CODEC = PacketCodec.tuple(
-            final @Nullable Identifier tag;
+                    PacketCodecs.INTEGER, Drop::weight,
-            final @Nullable Identifier item;
+                    PacketCodecs.optional(Identifier.PACKET_CODEC), Drop::tag,
-
+                    PacketCodecs.optional(Identifier.PACKET_CODEC), Drop::item,
-            public Drop(PacketByteBuf buffer) {
+                    Drop::new
-                weight = buffer.readInt();
+            );
-                tag = buffer.readOptional(PacketByteBuf::readIdentifier).orElse(null);
-                item = buffer.readOptional(PacketByteBuf::readIdentifier).orElse(null);
-            }
 
             @Override
             public void appendTo(Weighted.Builder<Supplier<ItemStack>> weighted) {
-                if (item != null) {
+                if (item.isPresent()) {
-                    Registries.ITEM.getOrEmpty(item).ifPresent(item -> {
+                    Registries.ITEM.getOrEmpty(item.get()).ifPresent(item -> {
                         weighted.put(weight, item::getDefaultStack);
                     });
                 } else {
                     weighted.put(weight, () -> {
-                        return Registries.ITEM.getOrCreateEntryList(TagKey.of(RegistryKeys.ITEM, tag))
+                        return Registries.ITEM.getOrCreateEntryList(TagKey.of(RegistryKeys.ITEM, tag.get()))
                                 .getRandom(Weighted.getRng())
                                 .map(RegistryEntry::value)
                                 .map(Item::getDefaultStack)
@@ -123,12 +133,6 @@ public class TreeTypeLoader extends JsonDataLoader implements IdentifiableResour
                     });
                 }
             }
-
-            public void write(PacketByteBuf buffer) {
-                buffer.writeInt(weight);
-                buffer.writeOptional(Optional.ofNullable(tag), PacketByteBuf::writeIdentifier);
-                buffer.writeOptional(Optional.ofNullable(item), PacketByteBuf::writeIdentifier);
-            }
         }
     }
 }

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

@@ -154,7 +154,7 @@ class MultiSpellSlot implements SpellSlots, NbtSerialisable {
             } else {
                 T spell = this.spell.get();
                 if (spell != null) {
-                    spell.getDataTracker().load(MsgTrackedValues.TrackerEntries.PACKET_CODEC.decode(buffer));
+                    spell.getDataTracker().load(MsgTrackedValues.TrackerEntries.PACKET_CODEC.decode(buffer), lookup);
                 }
             }
         }
@@ -171,7 +171,7 @@ class MultiSpellSlot implements SpellSlots, NbtSerialisable {
             if (spell == null) {
                 return Optional.empty();
             }
-            return spell.getDataTracker().getDirtyPairs().map(entries -> {
+            return spell.getDataTracker().getDirtyPairs(lookup).map(entries -> {
                 PacketByteBuf buffer = new PacketByteBuf(Unpooled.buffer());
                 buffer.writeByte(0);
                 TrackerEntries.PACKET_CODEC.encode(buffer, entries);

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

@@ -138,7 +138,7 @@ public interface Spell extends NbtSerialisable, Affine {
     static <T extends Spell> T readNbt(@Nullable NbtCompound compound, WrapperLookup lookup) {
         try {
             if (compound != null) {
-                return CustomisedSpellType.<T>fromNBT(compound).create(compound);
+                return CustomisedSpellType.<T>fromNBT(compound).create(compound, lookup);
             }
         } catch (Exception e) {
             Unicopia.LOGGER.fatal("Invalid spell nbt {}", e);

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

@@ -18,6 +18,7 @@ import com.minelittlepony.unicopia.util.shape.Sphere;
 import net.minecraft.entity.Entity;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.particle.ParticleTypes;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.util.hit.EntityHitResult;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
@@ -67,7 +68,7 @@ public class AttractiveSpell extends ShieldSpell implements HomingSpell, TimedSp
         source.spawnParticles(origin, new Sphere(false, range), 7, p -> {
             source.addParticle(
                     new FollowingParticleEffect(UParticles.HEALTH_DRAIN, origin, 0.4F)
-                        .withChild(ParticleTypes.AMBIENT_ENTITY_EFFECT),
+                        .withChild(ParticleTypes.EFFECT),
                     p,
                     Vec3d.ZERO
             );
@@ -149,16 +150,16 @@ public class AttractiveSpell extends ShieldSpell implements HomingSpell, TimedSp
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.toNBT(compound);
+        super.toNBT(compound, lookup);
-        compound.put("target", target.toNBT());
+        compound.put("target", target.toNBT(lookup));
-        timer.toNBT(compound);
+        timer.toNBT(compound, lookup);
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.fromNBT(compound);
+        super.fromNBT(compound, lookup);
-        target.fromNBT(compound.getCompound("target"));
+        target.fromNBT(compound.getCompound("target"), lookup);
-        timer.fromNBT(compound);
+        timer.fromNBT(compound, lookup);
     }
 }

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

@@ -16,6 +16,7 @@ import net.minecraft.util.Identifier;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.registry.Registries;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 
 public class AwkwardSpell extends AbstractSpell implements TimedSpell {
 
@@ -65,18 +66,20 @@ public class AwkwardSpell extends AbstractSpell implements TimedSpell {
             && type != ParticleTypes.SMOKE
             && type != ParticleTypes.EXPLOSION
             && type != ParticleTypes.EXPLOSION_EMITTER
-            && type != ParticleTypes.AMBIENT_ENTITY_EFFECT;
+            && type != ParticleTypes.ENTITY_EFFECT
+            && type != ParticleTypes.EFFECT
+            && type != ParticleTypes.INSTANT_EFFECT;
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.toNBT(compound);
+        super.toNBT(compound, lookup);
-        timer.toNBT(compound);
+        timer.toNBT(compound, lookup);
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.fromNBT(compound);
+        super.fromNBT(compound, lookup);
-        timer.fromNBT(compound);
+        timer.fromNBT(compound, lookup);
     }
 }

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

@@ -1,9 +1,8 @@
 package com.minelittlepony.unicopia.ability.magic.spell.effect;
 
 import java.util.Map;
-import java.util.UUID;
-
 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.attribute.AttributeFormat;
@@ -28,18 +27,19 @@ import net.minecraft.entity.attribute.*;
 import net.minecraft.entity.attribute.EntityAttributeModifier.Operation;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.particle.ParticleTypes;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
+import net.minecraft.registry.entry.RegistryEntry;
+import net.minecraft.util.Identifier;
 import net.minecraft.util.hit.EntityHitResult;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
 
-public class BubbleSpell extends AbstractSpell implements TimedSpell,
+public class BubbleSpell extends AbstractSpell implements TimedSpell, ProjectileDelegate.EntityHitListener {
-        ProjectileDelegate.EntityHitListener {
+    private static final Identifier EFFECT_ID = Unicopia.id("bubble_floating_modifier");
-    private static final EntityAttributeModifier GRAVITY_MODIFIER =
+    private static final EntityAttributeModifier GRAVITY_MODIFIER = new EntityAttributeModifier(EFFECT_ID, 0.02D - 1D, Operation.ADD_MULTIPLIED_TOTAL);
-            new EntityAttributeModifier(UUID.fromString("9dc7818b-927b-46e0-acbe-48d31a28128f"), "Bubble Floating", 0.02D - 1D, Operation.MULTIPLY_TOTAL);
+    private static final EntityAttributeModifier SPEED_MODIFIER = new EntityAttributeModifier(EFFECT_ID, 0.01D - 1D, Operation.ADD_MULTIPLIED_TOTAL);
-    private static final EntityAttributeModifier SPEED_MODIFIER =
-            new EntityAttributeModifier(UUID.fromString("9dc7818b-927b-46e0-acbe-48d31a28128f"), "Bubble Floating", 0.01D - 1D, Operation.MULTIPLY_TOTAL);
 
-    private static final Map<EntityAttribute, EntityAttributeModifier> MODIFIERS = Map.of(
+    private static final Map<RegistryEntry<EntityAttribute>, EntityAttributeModifier> MODIFIERS = Map.of(
             UEntityAttributes.ENTITY_GRAVITY_MODIFIER, GRAVITY_MODIFIER,
             UEntityAttributes.EXTENDED_REACH_DISTANCE, GRAVITY_MODIFIER,
             UEntityAttributes.EXTENDED_ATTACK_DISTANCE, GRAVITY_MODIFIER,
@@ -157,18 +157,18 @@ public class BubbleSpell extends AbstractSpell implements TimedSpell,
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.toNBT(compound);
+        super.toNBT(compound, lookup);
         compound.putInt("struggles", struggles.get());
         compound.putFloat("radius", radius.get());
-        timer.toNBT(compound);
+        timer.toNBT(compound, lookup);
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.fromNBT(compound);
+        super.fromNBT(compound, lookup);
         struggles.set(compound.getInt("struggles"));
         radius.set(compound.getFloat("radius"));
-        timer.fromNBT(compound);
+        timer.fromNBT(compound, lookup);
     }
 }

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

@@ -172,7 +172,7 @@ public class NecromancySpell extends AbstractAreaEffectSpell implements Projecti
                 if (master != null) {
                     master.applyDamageEffects(master, e);
                 }
-                e.getWorld().sendEntityStatus(e, (byte)60);
+                e.getWorld().sendEntityStatus(e, EntityStatuses.ADD_DEATH_PARTICLES);
                 e.discard();
             });
         });
@@ -199,7 +199,7 @@ public class NecromancySpell extends AbstractAreaEffectSpell implements Projecti
         for (int i = source.asWorld().random.nextInt(GEAR.length); i < GEAR.length; i++) {
             ItemStack pick = GEAR[i][(int)(powerScale * GEAR[i].length) % GEAR[i].length].getDefaultStack();
 
-            minion.equipStack(LivingEntity.getPreferredEquipmentSlot(pick), pick);
+            minion.equipStack(minion.getPreferredEquipmentSlot(pick), pick);
 
             if (source.asWorld().random.nextFloat() > powerScale) {
                 break;

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

@@ -30,6 +30,7 @@ import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.particle.ParticleTypes;
 import net.minecraft.predicate.entity.EntityPredicates;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Vec3d;
 
@@ -162,14 +163,14 @@ public class SiphoningSpell extends AbstractAreaEffectSpell {
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.toNBT(compound);
+        super.toNBT(compound, lookup);
         compound.putInt("upset", ticksUpset);
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.fromNBT(compound);
+        super.fromNBT(compound, lookup);
         ticksUpset = compound.getInt("upset");
         if (ticksUpset > 0) {
             upset.set(true);

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

@@ -19,6 +19,7 @@ import java.util.stream.Stream;
 
 import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.client.gui.ItemTraitsTooltipRenderer;
+import com.minelittlepony.unicopia.item.component.UDataComponentTypes;
 import com.minelittlepony.unicopia.util.InventoryUtil;
 import com.mojang.datafixers.util.Pair;
 import com.mojang.serialization.Codec;
@@ -32,10 +33,8 @@ import net.minecraft.item.Item;
 import net.minecraft.item.SpawnEggItem;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NbtCompound;
-import net.minecraft.nbt.NbtElement;
 import net.minecraft.nbt.NbtOps;
 import net.minecraft.network.PacketByteBuf;
-import net.minecraft.network.RegistryByteBuf;
 import net.minecraft.network.codec.PacketCodec;
 import net.minecraft.text.Text;
 import net.minecraft.util.Identifier;
@@ -248,19 +247,16 @@ public final class SpellTraits implements Iterable<Map.Entry<Trait, Float>> {
     }
 
     public static Optional<SpellTraits> getEmbeddedTraits(ItemStack stack) {
-        if (!stack.hasNbt() || !stack.getNbt().contains("spell_traits", NbtElement.COMPOUND_TYPE)) {
+        return Optional.ofNullable(stack.get(UDataComponentTypes.SPELL_TRAITS));
-            return Optional.empty();
-        }
-        return fromNbt(stack.getNbt().getCompound("spell_traits"));
     }
 
     public ItemStack applyTo(ItemStack stack) {
         stack = stack.copy();
         if (isEmpty()) {
-            stack.removeSubNbt("spell_traits");
+            stack.remove(UDataComponentTypes.SPELL_TRAITS);
             return stack;
         }
-        stack.getOrCreateNbt().put("spell_traits", toNbt());
+        stack.set(UDataComponentTypes.SPELL_TRAITS, this);
         return stack;
     }
 

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

@@ -9,8 +9,8 @@ import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.command.CommandArgumentEnum;
 import com.mojang.serialization.Codec;
 import net.minecraft.command.argument.EnumArgumentType;
+import net.minecraft.component.type.AttributeModifiersComponent;
 import net.minecraft.item.Item;
-import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NbtElement;
 import net.minecraft.nbt.NbtList;
 import net.minecraft.text.*;
@@ -92,7 +92,7 @@ public enum Trait implements CommandArgumentEnum<Trait> {
             Text.empty(),
             Text.translatable("trait." + getId().getNamespace() + "." + getId().getPath() + ".description").formatted(Formatting.GRAY),
             Text.empty(),
-            Text.translatable("gui.unicopia.trait.corruption", ItemStack.MODIFIER_FORMAT.format(getGroup().getCorruption())).formatted(Formatting.ITALIC, corruptionColor)
+            Text.translatable("gui.unicopia.trait.corruption", AttributeModifiersComponent.DECIMAL_FORMAT.format(getGroup().getCorruption())).formatted(Formatting.ITALIC, corruptionColor)
         );
 
         MutableText tooltipText = getName().copy();

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

@@ -32,6 +32,7 @@ import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.text.Text;
 import net.minecraft.util.Identifier;
 import net.minecraft.registry.Registries;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.world.World;
 
 public class TraitDiscovery implements NbtSerialisable, Copyable<TraitDiscovery> {
@@ -120,7 +121,7 @@ public class TraitDiscovery implements NbtSerialisable, Copyable<TraitDiscovery>
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
         NbtCompound disco = new NbtCompound();
         items.forEach((key, val) -> {
             disco.put(key.toString(), val.toNbt());
@@ -137,7 +138,7 @@ public class TraitDiscovery implements NbtSerialisable, Copyable<TraitDiscovery>
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
         clear();
         NbtCompound disco = compound.getCompound("items");
         disco.getKeys().forEach(key -> {

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

@@ -52,19 +52,19 @@ public class TraitLoader extends SinglePreparationResourceReloader<Multimap<Iden
             profiler.push(path.toString());
             try {
                 for (Resource resource : manager.getAllResources(path)) {
-                    profiler.push(resource.getResourcePackName());
+                    profiler.push(resource.getPackId());
 
                     try (InputStreamReader reader = new InputStreamReader(resource.getInputStream(), StandardCharsets.UTF_8)) {
                         JsonObject data = JsonHelper.deserialize(Resources.GSON, reader, JsonObject.class);
 
-                        TraitStream set = TraitStream.of(path, resource.getResourcePackName(), data);
+                        TraitStream set = TraitStream.of(path, resource.getPackId(), data);
 
                         if (set.replace()) {
                             prepared.removeAll(path);
                         }
                         prepared.put(path, set);
                     } catch (JsonParseException e) {
-                        Unicopia.LOGGER.error("Error reading traits file " + resource.getResourcePackName() + ":" + path, e);
+                        Unicopia.LOGGER.error("Error reading traits file " + resource.getPackId() + ":" + path, e);
                     } finally {
                         profiler.pop();
                     }

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

@@ -183,7 +183,7 @@ public class ItemJarBlock extends JarBlock implements BlockEntityProvider, Inven
             } else if (getFluid() != null) {
                 nbt.put("fluid", getFluid().toNBT(new NbtCompound(), lookup));
             } else if (getFakeFluid() != null) {
-                nbt.put("fakeFluid", getFakeFluid().toNBT(new NbtCompound()));
+                nbt.put("fakeFluid", getFakeFluid().toNBT(new NbtCompound(), lookup));
             }
         }
     }

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

@@ -15,11 +15,13 @@ import net.minecraft.block.TransparentBlock;
 import net.minecraft.block.Waterloggable;
 import net.minecraft.block.entity.BlockEntity;
 import net.minecraft.enchantment.EnchantmentHelper;
+import net.minecraft.enchantment.Enchantments;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.fluid.FluidState;
 import net.minecraft.fluid.Fluids;
 import net.minecraft.item.ItemPlacementContext;
 import net.minecraft.item.ItemStack;
+import net.minecraft.registry.RegistryKeys;
 import net.minecraft.state.StateManager;
 import net.minecraft.state.property.BooleanProperty;
 import net.minecraft.state.property.Properties;
@@ -101,7 +103,8 @@ public class JarBlock extends TransparentBlock implements Waterloggable {
     @Override
     public void afterBreak(World world, PlayerEntity player, BlockPos pos, BlockState state, @Nullable BlockEntity blockEntity, ItemStack tool) {
         super.afterBreak(world, player, pos, state, blockEntity, tool);
-        if (!EnchantmentHelper.hasSilkTouch(tool) && !player.shouldCancelInteraction()) {
+        // TODO: Enchantment tag
+        if (EnchantmentHelper.getLevel(world.getRegistryManager().get(RegistryKeys.ENCHANTMENT).getEntry(Enchantments.SILK_TOUCH).get(), tool) == 0 && !player.shouldCancelInteraction()) {
             if (asItem() instanceof WeatherJarItem jar) {
                 jar.releaseContents(world, pos);
             }

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

@@ -76,7 +76,7 @@ public class ShellsBlock extends Block implements Waterloggable {
     }
 
     @Override
-    public boolean canPathfindThrough(BlockState state, BlockView world, BlockPos pos, NavigationType type) {
+    public boolean canPathfindThrough(BlockState state, NavigationType type) {
-        return (type == NavigationType.WATER) == world.getFluidState(pos).isIn(FluidTags.WATER);
+        return (type == NavigationType.WATER) == state.getFluidState().isIn(FluidTags.WATER);
     }
 }

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

@@ -16,7 +16,6 @@ import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.item.enchantment.AttributedEnchantment;
 import net.fabricmc.fabric.api.client.item.v1.ItemTooltipCallback;
 import net.minecraft.client.MinecraftClient;
-import net.minecraft.client.item.TooltipContext;
 import net.minecraft.enchantment.Enchantment;
 import net.minecraft.entity.EquipmentSlot;
 import net.minecraft.entity.attribute.EntityAttribute;
@@ -24,7 +23,9 @@ import net.minecraft.entity.attribute.EntityAttributeModifier;
 import net.minecraft.entity.attribute.EntityAttributes;
 import net.minecraft.entity.attribute.EntityAttributeModifier.Operation;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.screen.ScreenTexts;
 import net.minecraft.text.Text;
@@ -32,11 +33,12 @@ import net.minecraft.util.Formatting;
 import net.minecraft.util.Identifier;
 import net.minecraft.util.Pair;
 import net.minecraft.registry.Registries;
+import net.minecraft.registry.entry.RegistryEntry;
 
 public class ModifierTooltipRenderer implements ItemTooltipCallback {
 
     @Override
-    public void getTooltip(ItemStack stack, TooltipContext context, List<Text> lines) {
+    public void getTooltip(ItemStack stack, Item.TooltipContext tooltipContext, TooltipType tooltipType, List<Text> lines) {
 
         int flags = stack.hasNbt() && stack.getNbt().contains("HideFlags", 99) ? stack.getNbt().getInt("HideFlags") : 0;
 
@@ -60,7 +62,7 @@ public class ModifierTooltipRenderer implements ItemTooltipCallback {
 
                 if (!newLines.isEmpty()) {
                     Text find = Text.translatable("item.modifiers." + slot.getName()).formatted(Formatting.GRAY);
-                    int insertPosition = getInsertPosition(stack, find, flags, lines, context.isAdvanced());
+                    int insertPosition = getInsertPosition(stack, find, flags, lines, tooltipType.isAdvanced());
                     if (insertPosition == -1) {
                         lines.add(ScreenTexts.EMPTY);
                         lines.add(find);
@@ -113,18 +115,18 @@ public class ModifierTooltipRenderer implements ItemTooltipCallback {
         return lines.indexOf(category);
     }
 
-    private void describeModifiers(EntityAttribute attribute, EntityAttributeModifier modifier, @Nullable PlayerEntity player, List<Text> lines) {
+    private void describeModifiers(RegistryEntry<EntityAttribute> attribute, EntityAttributeModifier modifier, @Nullable PlayerEntity player, List<Text> lines) {
-        double value = modifier.getValue();
+        double value = modifier.value();
         boolean baseAdjusted = false;
         if (player != null) {
             value += player.getAttributeBaseValue(attribute);
             baseAdjusted = true;
         }
 
-        Operation op = modifier.getOperation();
+        Operation op = modifier.operation();
 
         double displayValue;
-        if (op != EntityAttributeModifier.Operation.MULTIPLY_BASE && op != EntityAttributeModifier.Operation.MULTIPLY_TOTAL) {
+        if (op != EntityAttributeModifier.Operation.ADD_MULTIPLIED_BASE && op != EntityAttributeModifier.Operation.ADD_MULTIPLIED_TOTAL) {
             displayValue = value;
         } else {
             displayValue = value * 100;

src/main/java/com/minelittlepony/unicopia/client/gui/spellbook/element/Structure.java

@@ -23,7 +23,7 @@ public record Structure(Bounds bounds, Schematic schematic) implements PageEleme
         Immediate immediate = context.getVertexConsumers();
 
         MinecraftClient client = MinecraftClient.getInstance();
-        float tickDelta = client.player.age + client.getTickDelta();
+        float tickDelta = client.player.age + client.getRenderTickCounter().getTickDelta(false);
         float age = tickDelta % 360F;
 
         matrices.push();

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

@@ -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.get((LivingEntity)entity).stack().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 -> id.withPath(p  -> "textures/models/armor/" + p + ".png"));
     }
 
     @Override
@@ -58,7 +58,7 @@ class AmuletGear extends AmuletModel implements Gear {
     }
 
     @Override
-    public void render(MatrixStack stack, VertexConsumer consumer, int light, int overlay, float red, float green, float blue, float alpha, UUID interpolatorId) {
+    public void render(MatrixStack stack, VertexConsumer consumer, int light, int overlay, int color, UUID interpolatorId) {
-        render(stack, consumer, light, overlay, red, green, blue, 1);
+        render(stack, consumer, light, overlay, color);
     }
 }

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

@@ -5,7 +5,6 @@ import java.util.UUID;
 import com.minelittlepony.api.model.BodyPart;
 import com.minelittlepony.api.model.PonyModel;
 import com.minelittlepony.api.model.gear.Gear;
-import com.minelittlepony.common.util.Color;
 import com.minelittlepony.unicopia.client.render.BraceletFeatureRenderer;
 import com.minelittlepony.unicopia.client.render.BraceletFeatureRenderer.BraceletModel;
 import com.minelittlepony.unicopia.compat.trinkets.TrinketsDelegate;
@@ -19,10 +18,11 @@ import net.minecraft.client.render.entity.model.BipedEntityModel;
 import net.minecraft.client.render.entity.model.EntityModel;
 import net.minecraft.client.util.SkinTextures.Model;
 import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.component.type.DyedColorComponent;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.LivingEntity;
-import net.minecraft.item.DyeableItem;
 import net.minecraft.util.Arm;
+import net.minecraft.util.Colors;
 import net.minecraft.util.Identifier;
 
 class BangleGear implements Gear {
@@ -66,9 +66,11 @@ class BangleGear implements Gear {
     @Override
     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;
+        color = Colors.WHITE;
+        glowing = false;
         FriendshipBraceletItem.getWornBangles((LivingEntity)entity, slot).findFirst().ifPresent(bracelet -> {
-            color = ((DyeableItem)bracelet.stack().getItem()).getColor(bracelet.stack());
+            color = DyedColorComponent.getColor(bracelet.stack(), Colors.WHITE);
-            glowing = ((GlowableItem)bracelet.stack().getItem()).isGlowing(bracelet.stack());
+            glowing = GlowableItem.isGlowing(bracelet.stack());
         });
         BraceletModel m = alex ? alexModel : steveModel;
 
@@ -80,8 +82,8 @@ class BangleGear implements Gear {
     }
 
     @Override
-    public void render(MatrixStack stack, VertexConsumer consumer, int light, int overlay, float red, float green, float blue, float alpha, UUID interpolatorId) {
+    public void render(MatrixStack stack, VertexConsumer consumer, int light, int overlay, int color, UUID interpolatorId) {
         BraceletModel m = alex ? alexModel : steveModel;
-        m.render(stack, consumer, glowing ? 0x0F00F0 : light, overlay, Color.r(color), Color.g(color), Color.b(color), 1);
+        m.render(stack, consumer, glowing ? 0x0F00F0 : light, overlay, this.color);
     }
 }

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

@@ -23,6 +23,7 @@ import net.minecraft.client.render.item.ItemRenderer;
 import net.minecraft.client.util.math.MatrixStack;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.item.ItemStack;
+import net.minecraft.util.Colors;
 import net.minecraft.util.Identifier;
 import net.minecraft.registry.Registries;
 
@@ -45,14 +46,14 @@ public class AmuletFeatureRenderer<E extends LivingEntity> implements AccessoryF
         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"));
+            Identifier texture = textures.computeIfAbsent(Registries.ITEM.getId(stack.getItem()), id -> id.withPath(p -> "textures/models/armor/" + p + ".png"));
 
-            VertexConsumer consumer = ItemRenderer.getArmorGlintConsumer(renderContext, RenderLayer.getArmorCutoutNoCull(texture), false, false);
+            VertexConsumer consumer = ItemRenderer.getArmorGlintConsumer(renderContext, RenderLayer.getArmorCutoutNoCull(texture), false);
 
             if (context.getModel() instanceof BipedEntityModel) {
                 model.setAngles(entity, context.getModel());
             }
-            model.render(matrices, consumer, lightUv, OverlayTexture.DEFAULT_UV, 1, 1, 1, 1);
+            model.render(matrices, consumer, lightUv, OverlayTexture.DEFAULT_UV, Colors.WHITE);
         }
     }
 
@@ -79,8 +80,8 @@ public class AmuletFeatureRenderer<E extends LivingEntity> implements AccessoryF
         }
 
         @Override
-        public void render(MatrixStack matrices, VertexConsumer vertexConsumer, int i, int j, float f, float g, float h, float k) {
+        public void render(MatrixStack matrices, VertexConsumer vertexConsumer, int i, int j, int color) {
-            amulet.render(matrices, vertexConsumer, i, j, f, g, h, k);
+            amulet.render(matrices, vertexConsumer, i, j, color);
         }
     }
 }

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

@@ -1,6 +1,5 @@
 package com.minelittlepony.unicopia.client.render;
 
-import com.minelittlepony.common.util.Color;
 import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.client.minelittlepony.MineLPDelegate;
 import com.minelittlepony.unicopia.compat.trinkets.TrinketsDelegate;
@@ -15,6 +14,7 @@ import net.minecraft.client.model.ModelPartData;
 import net.minecraft.client.model.ModelTransform;
 import net.minecraft.client.model.TexturedModelData;
 import net.minecraft.client.network.ClientPlayerEntity;
+import net.minecraft.client.render.LightmapTextureManager;
 import net.minecraft.client.render.OverlayTexture;
 import net.minecraft.client.render.RenderLayer;
 import net.minecraft.client.render.VertexConsumer;
@@ -25,9 +25,9 @@ import net.minecraft.client.render.entity.model.EntityModelPartNames;
 import net.minecraft.client.render.item.ItemRenderer;
 import net.minecraft.client.util.SkinTextures;
 import net.minecraft.client.util.math.MatrixStack;
+import net.minecraft.component.type.DyedColorComponent;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.decoration.ArmorStandEntity;
-import net.minecraft.item.DyeableItem;
 import net.minecraft.item.ItemStack;
 import net.minecraft.util.*;
 
@@ -58,7 +58,7 @@ public class BraceletFeatureRenderer<E extends LivingEntity> implements Accessor
     }
 
     private void renderBangleThirdPerson(ItemStack item, MatrixStack stack, VertexConsumerProvider renderContext, int lightUv, E entity, float limbDistance, float limbAngle, float tickDelta, float age, float headYaw, float headPitch, Arm mainArm) {
-        int j = ((DyeableItem)item.getItem()).getColor(item);
+        int j = DyedColorComponent.getColor(item, Colors.WHITE);
 
         boolean alex = entity instanceof ClientPlayerEntity && ((ClientPlayerEntity)entity).getSkinTextures().model() == SkinTextures.Model.SLIM;
 
@@ -69,40 +69,36 @@ public class BraceletFeatureRenderer<E extends LivingEntity> implements Accessor
             ModelPart arm = isLeft ? context.getModel().leftArm : context.getModel().rightArm;
             arm.visible = true;
             VertexConsumer consumer = renderContext.getBuffer(context.getModel().getLayer(context.getTexture(entity)));
-            arm.render(stack, consumer, lightUv, OverlayTexture.DEFAULT_UV, 1, 1, 1, 1);
+            arm.render(stack, consumer, lightUv, OverlayTexture.DEFAULT_UV, Colors.WHITE);
         }
 
-        boolean glowing = ((GlowableItem)item.getItem()).isGlowing(item);
+        VertexConsumer consumer = ItemRenderer.getArmorGlintConsumer(renderContext, RenderLayer.getArmorCutoutNoCull(TEXTURE), false);
-
-        VertexConsumer consumer = ItemRenderer.getArmorGlintConsumer(renderContext, RenderLayer.getArmorCutoutNoCull(TEXTURE), false, false);
 
         model.setAngles(context.getModel());
         model.setVisible(mainArm);
-        model.render(stack, consumer, glowing ? 0x0F00F0 : lightUv, OverlayTexture.DEFAULT_UV, Color.r(j), Color.g(j), Color.b(j), 1);
+        model.render(stack, consumer, GlowableItem.isGlowing(item) ? LightmapTextureManager.MAX_LIGHT_COORDINATE : lightUv, OverlayTexture.DEFAULT_UV, j);
     }
 
     @Override
     public void renderArm(MatrixStack stack, VertexConsumerProvider renderContext, int lightUv, E entity, ModelPart armModel, Arm side) {
         FriendshipBraceletItem.getWornBangles(entity, side == entity.getMainArm() ? TrinketsDelegate.MAIN_GLOVE : TrinketsDelegate.SECONDARY_GLOVE).findFirst().ifPresent(item -> {
-            int j = ((DyeableItem)item.stack().getItem()).getColor(item.stack());
+            int j = DyedColorComponent.getColor(item.stack(), Colors.WHITE);
 
             boolean alex = entity instanceof ClientPlayerEntity && ((ClientPlayerEntity)entity).getSkinTextures().model() == SkinTextures.Model.SLIM;
 
             BraceletModel model = alex ? alexModel : steveModel;
 
-            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);
             } else {
                 stack.translate(0, -0.1, 0);
             }
 
-            VertexConsumer consumer = ItemRenderer.getArmorGlintConsumer(renderContext, RenderLayer.getArmorCutoutNoCull(TEXTURE), false, false);
+            VertexConsumer consumer = ItemRenderer.getArmorGlintConsumer(renderContext, RenderLayer.getArmorCutoutNoCull(TEXTURE), false);
 
             model.setAngles(context.getModel());
             model.setVisible(side);
-            model.render(stack, consumer, glowing ? 0x0F00F0 : lightUv, OverlayTexture.DEFAULT_UV, Color.r(j), Color.g(j), Color.b(j), 1);
+            model.render(stack, consumer, GlowableItem.isGlowing(item.stack()) ? LightmapTextureManager.MAX_LIGHT_COORDINATE : lightUv, OverlayTexture.DEFAULT_UV, j);
         });
     }
 
@@ -144,9 +140,9 @@ public class BraceletFeatureRenderer<E extends LivingEntity> implements Accessor
         }
 
         @Override
-        public void render(MatrixStack matrixStack, VertexConsumer vertexConsumer, int i, int j, float f, float g, float h, float k) {
+        public void render(MatrixStack matrixStack, VertexConsumer vertexConsumer, int i, int j, int color) {
-            leftArm.render(matrixStack, vertexConsumer, i, j, f, g, h, k);
+            leftArm.render(matrixStack, vertexConsumer, i, j, color);
-            rightArm.render(matrixStack, vertexConsumer, i, j, f, g, h, k);
+            rightArm.render(matrixStack, vertexConsumer, i, j, color);
         }
     }
 

src/main/java/com/minelittlepony/unicopia/client/render/shader/ViewportShader.java

@@ -27,8 +27,8 @@ public class ViewportShader implements SynchronousResourceReloader, Identifiable
 
     public static final ViewportShader INSTANCE = new ViewportShader();
 
-    public static final Identifier CREEPER_SHADER = new Identifier("shaders/post/invert.json");
+    public static final Identifier CREEPER_SHADER = Identifier.ofVanilla("shaders/post/invert.json");
-    public static final Identifier DESATURATION_SHADER = new Identifier("shaders/post/desaturate.json");
+    public static final Identifier DESATURATION_SHADER = Identifier.ofVanilla("shaders/post/desaturate.json");
 
     private final MinecraftClient client = MinecraftClient.getInstance();
 
@@ -112,8 +112,8 @@ public class ViewportShader implements SynchronousResourceReloader, Identifiable
         }
 
         @Override
-        public PostEffectPass addPass(String programName, Framebuffer source, Framebuffer dest) throws IOException {
+        public PostEffectPass addPass(String programName, Framebuffer source, Framebuffer dest, boolean linear) throws IOException {
-            PostEffectPass pass = super.addPass(programName, source, dest);
+            PostEffectPass pass = super.addPass(programName, source, dest, linear);
             if (programs == null) {
                programs = LinkedListMultimap.create();
             }

src/main/java/com/minelittlepony/unicopia/compat/trinkets/UnicopiaTrinket.java

@@ -1,7 +1,5 @@
 package com.minelittlepony.unicopia.compat.trinkets;
 
-import java.util.UUID;
-
 import com.google.common.collect.Multimap;
 import com.minelittlepony.unicopia.entity.ItemTracker;
 import com.minelittlepony.unicopia.entity.Living;
@@ -9,16 +7,17 @@ import com.minelittlepony.unicopia.item.FriendshipBraceletItem;
 import com.minelittlepony.unicopia.item.WearableItem;
 
 import dev.emi.trinkets.api.*;
-import net.minecraft.enchantment.EnchantmentHelper;
+import net.minecraft.component.DataComponentTypes;
+import net.minecraft.entity.EquipmentSlot;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.attribute.EntityAttribute;
 import net.minecraft.entity.attribute.EntityAttributeModifier;
 import net.minecraft.item.Equipment;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.predicate.entity.EntityPredicates;
 import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.sound.SoundEvent;
+import net.minecraft.util.Identifier;
 import net.minecraft.world.event.GameEvent;
 
 public class UnicopiaTrinket implements Trinket {
@@ -74,21 +73,22 @@ public class UnicopiaTrinket implements Trinket {
         return slot.inventory().getStack(slot.index()).isEmpty();
     }
 
-    @Override
-    public boolean canUnequip(ItemStack stack, SlotReference slot, LivingEntity entity) {
-        return !(EnchantmentHelper.hasBindingCurse(stack) && EntityPredicates.EXCEPT_CREATIVE_OR_SPECTATOR.test(entity));
-    }
-
     @Override
     public void tick(ItemStack stack, SlotReference slot, LivingEntity entity) {
         item.inventoryTick(stack, entity.getWorld(), entity, slot.index(), false);
     }
 
     @Override
-    public Multimap<EntityAttribute, EntityAttributeModifier> getModifiers(ItemStack stack, SlotReference slot, LivingEntity entity, UUID uuid) {
+    public Multimap<RegistryEntry<EntityAttribute>, EntityAttributeModifier> getModifiers(ItemStack stack, SlotReference slot, LivingEntity entity, Identifier slotIdentifier) {
-        Multimap<EntityAttribute, EntityAttributeModifier> modifiers = Trinket.super.getModifiers(stack, slot, entity, uuid);
+        Multimap<RegistryEntry<EntityAttribute>, EntityAttributeModifier> modifiers = Trinket.super.getModifiers(stack, slot, entity, slotIdentifier);
+
         if (item instanceof WearableItem wearable) {
-            item.getAttributeModifiers(wearable.getSlotType(stack));
+            EquipmentSlot es = wearable.getSlotType(stack);
+            stack.get(DataComponentTypes.ATTRIBUTE_MODIFIERS).modifiers().forEach(entry -> {
+                if (entry.slot().matches(es)) {
+                    modifiers.put(entry.attribute(), entry.modifier());
+                }
+            });
         }
         return modifiers;
     }

src/main/java/com/minelittlepony/unicopia/container/SpellbookScreenHandler.java

@@ -11,16 +11,15 @@ import com.minelittlepony.unicopia.item.UItems;
 import com.minelittlepony.unicopia.recipe.URecipes;
 import com.mojang.datafixers.util.Pair;
 
+import net.minecraft.component.EnchantmentEffectComponentTypes;
 import net.minecraft.enchantment.EnchantmentHelper;
 import net.minecraft.entity.EquipmentSlot;
-import net.minecraft.entity.mob.MobEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.entity.player.PlayerInventory;
 import net.minecraft.inventory.CraftingResultInventory;
 import net.minecraft.inventory.Inventory;
 import net.minecraft.item.Equipment;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
 import net.minecraft.network.packet.s2c.play.ScreenHandlerSlotUpdateS2CPacket;
 import net.minecraft.recipe.RecipeEntry;
 import net.minecraft.screen.PlayerScreenHandler;
@@ -129,7 +128,7 @@ public class SpellbookScreenHandler extends ScreenHandler {
                 @Override
                 public boolean canTakeItems(PlayerEntity playerEntity) {
                     ItemStack stack = getStack();
-                    if (!stack.isEmpty() && !playerEntity.isCreative() && EnchantmentHelper.hasBindingCurse(stack)) {
+                    if (!stack.isEmpty() && !playerEntity.isCreative() && EnchantmentHelper.hasAnyEnchantmentsWith(stack, EnchantmentEffectComponentTypes.PREVENT_ARMOR_CHANGE)) {
                         return false;
                     }
                     return super.canTakeItems(playerEntity);
@@ -323,7 +322,7 @@ public class SpellbookScreenHandler extends ScreenHandler {
             Slot slot = getSlot(i);
             ItemStack current = slot.getStack();
 
-            if (!current.isEmpty() && ItemStack.canCombine(stack, current)) {
+            if (!current.isEmpty() && ItemStack.areItemsAndComponentsEqual(stack, current)) {
                 // abide by the slot's max item count when trying to insert stacks
                 int available = Math.min(Math.min(current.getMaxCount(), slot.getMaxItemCount(stack)) - current.getCount(), stack.getCount());
 

src/main/java/com/minelittlepony/unicopia/container/SpellbookState.java

@@ -5,20 +5,26 @@ import java.util.function.Consumer;
 
 import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.network.datasync.Synchronizable;
-import com.minelittlepony.unicopia.util.NbtSerialisable;
+import com.mojang.serialization.Codec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
 
-import net.minecraft.nbt.NbtCompound;
+import io.netty.buffer.ByteBuf;
-import net.minecraft.nbt.NbtElement;
-import net.minecraft.network.PacketByteBuf;
 import net.minecraft.network.RegistryByteBuf;
 import net.minecraft.network.codec.PacketCodec;
-import net.minecraft.registry.RegistryWrapper.WrapperLookup;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.util.Identifier;
 import net.minecraft.util.math.MathHelper;
 
-public class SpellbookState extends Synchronizable<SpellbookState> implements NbtSerialisable {
+public class SpellbookState extends Synchronizable<SpellbookState> {
-    // TODO: SpellbookState needs a packet codec
+    public static final Codec<SpellbookState> CODEC = RecordCodecBuilder.create(instance -> instance.group(
-    public static final PacketCodec<RegistryByteBuf, SpellbookState> PACKET_CODEC = null;
+            Identifier.CODEC.optionalFieldOf("current_page").forGetter(i -> i.currentPageId),
+            Codec.unboundedMap(Identifier.CODEC, PageState.CODEC).fieldOf("states").forGetter(i -> i.states)
+    ).apply(instance, SpellbookState::new));
+    public static final PacketCodec<RegistryByteBuf, SpellbookState> PACKET_CODEC = PacketCodec.tuple(
+            PacketCodecs.optional(Identifier.PACKET_CODEC), SpellbookState::getCurrentPageId,
+            PacketCodecs.map(HashMap::new, Identifier.PACKET_CODEC, PageState.PACKET_CODEC), p -> p.states,
+            SpellbookState::new
+    );
 
     public static final Identifier CRAFTING_ID = Unicopia.id("crafting");
     public static final Identifier PROFILE_ID = Unicopia.id("profile");
@@ -30,6 +36,15 @@ public class SpellbookState extends Synchronizable<SpellbookState> implements Nb
 
     private final Map<Identifier, PageState> states = new HashMap<>();
 
+    public SpellbookState() {}
+
+    private SpellbookState(Optional<Identifier> currentPageId, Map<Identifier, PageState> states) {
+        this.currentPageId = currentPageId;
+        states.forEach((id, state) -> {
+            getState(id).offset = state.offset;
+        });
+    }
+
     public boolean isDirty() {
         boolean isDirty = dirty;
         dirty = false;
@@ -56,42 +71,21 @@ public class SpellbookState extends Synchronizable<SpellbookState> implements Nb
         dirty = true;
     }
 
-    public void toPacket(PacketByteBuf buf) {
+    public SpellbookState createCopy() {
-        buf.writeOptional(currentPageId, PacketByteBuf::writeIdentifier);
+        SpellbookState copy = new SpellbookState();
-        buf.writeMap(states, PacketByteBuf::writeIdentifier, (b, v) -> v.toPacket(b));
+        copy.currentPageId = currentPageId;
-    }
+        states.forEach((id, state) -> {
-
+            copy.getState(id).offset = state.offset;
-    public SpellbookState fromPacket(PacketByteBuf buf) {
-        currentPageId = buf.readOptional(PacketByteBuf::readIdentifier);
-        buf.readMap(PacketByteBuf::readIdentifier, b -> new PageState(page -> synchronize()).fromPacket(b)).forEach((id, state) -> {
-            getState(id).copyFrom(state);
         });
-        return this;
+        return copy;
     }
 
-    @Override
+    public static class PageState extends Synchronizable<PageState> {
-    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
+        public static final Codec<PageState> CODEC = RecordCodecBuilder.create(instance -> instance.group(
-        currentPageId.ifPresent(id -> compound.putString("current_page", id.toString()));
+                Codec.INT.fieldOf("offset").forGetter(PageState::getOffset)
-        NbtCompound states = new NbtCompound();
+        ).apply(instance, PageState::new));
-        compound.put("states", states);
+        public static final PacketCodec<ByteBuf, PageState> PACKET_CODEC = PacketCodecs.INTEGER.xmap(PageState::new, PageState::getOffset);
-        this.states.forEach((id, page) -> {
-            states.put(id.toString(), page.toNBT(lookup));
-        });
-    }
 
-    @Override
-    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
-        currentPageId = compound.contains("current_page", NbtElement.STRING_TYPE) ? Optional.ofNullable(Identifier.tryParse(compound.getString("current_page"))) : Optional.empty();
-        NbtCompound states = compound.getCompound("states");
-        states.getKeys().stream().forEach(key -> {
-            Identifier id = Identifier.tryParse(key);
-            if (id != null) {
-                getState(id).fromNBT(states.getCompound(key), lookup);
-            }
-        });
-    }
-
-    public static class PageState extends Synchronizable<PageState> implements NbtSerialisable {
         private int offset;
 
         public PageState() {}
@@ -100,6 +94,10 @@ public class SpellbookState extends Synchronizable<SpellbookState> implements Nb
             setSynchronizer(synchronizer);
         }
 
+        public PageState(int offset) {
+            this.offset = offset;
+        }
+
         @Override
         public void copyFrom(PageState other) {
             offset = other.offset;
@@ -117,24 +115,5 @@ public class SpellbookState extends Synchronizable<SpellbookState> implements Nb
         public void swap(int incr, int max) {
             setOffset(MathHelper.clamp(getOffset() + incr, 0, max - 1));
         }
-
-        public void toPacket(PacketByteBuf buf) {
-            buf.writeInt(offset);
-        }
-
-        public PageState fromPacket(PacketByteBuf buf) {
-            offset = buf.readInt();
-            return this;
-        }
-
-        @Override
-        public void toNBT(NbtCompound compound, WrapperLookup lookup) {
-            compound.putInt("offset", offset);
-        }
-
-        @Override
-        public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
-            offset = compound.getInt("offset");
-        }
     }
 }

src/main/java/com/minelittlepony/unicopia/datagen/Datagen.java

@@ -8,6 +8,7 @@ import com.minelittlepony.unicopia.datagen.providers.DietsProvider;
 import com.minelittlepony.unicopia.datagen.providers.SeasonsGrowthRatesProvider;
 import com.minelittlepony.unicopia.datagen.providers.UAdvancementsProvider;
 import com.minelittlepony.unicopia.datagen.providers.UModelProvider;
+import com.minelittlepony.unicopia.datagen.providers.UPaintingVariantProvider;
 import com.minelittlepony.unicopia.datagen.providers.loot.UBlockAdditionsLootTableProvider;
 import com.minelittlepony.unicopia.datagen.providers.loot.UBlockLootTableProvider;
 import com.minelittlepony.unicopia.datagen.providers.loot.UChestAdditionsLootTableProvider;
@@ -61,7 +62,9 @@ public class Datagen implements DataGeneratorEntrypoint {
         pack.addProvider(UEntityTypeTagProvider::new);
         pack.addProvider(UStatusEffectTagProvider::new);
         pack.addProvider(UDimensionTypeTagProvider::new);
-        pack.addProvider(UPaintingVariantTagProvider::new);
+
+        final var paintingVariantProvider = pack.addProvider(UPaintingVariantProvider::new);
+        pack.addProvider((output, registries) -> new UPaintingVariantTagProvider(output, registries, paintingVariantProvider));
 
         pack.addProvider(UModelProvider::new);
         pack.addProvider(URecipeProvider::new);

src/main/java/com/minelittlepony/unicopia/datagen/providers/DietProfileGenerator.java

@@ -17,8 +17,8 @@ import com.minelittlepony.unicopia.diet.affliction.StatusEffectAffliction;
 import com.minelittlepony.unicopia.entity.effect.UEffects;
 import com.minelittlepony.unicopia.item.UFoodComponents;
 
+import net.minecraft.component.type.FoodComponents;
 import net.minecraft.entity.effect.StatusEffects;
-import net.minecraft.item.FoodComponents;
 
 public class DietProfileGenerator {
 

src/main/java/com/minelittlepony/unicopia/datagen/providers/DietsProvider.java

@@ -55,7 +55,7 @@ public class DietsProvider implements DataProvider {
                     }
                     keyToGroupId.computeIfAbsent(key.id(), i -> new HashSet<>()).add(id);
                 });
-                diets.accept(id, () -> FoodGroup.CODEC.encode(attributes, JsonOps.INSTANCE, new JsonObject()).result().get());
+                diets.accept(id, () -> FoodGroup.EFFECTS_CODEC.encode(attributes, JsonOps.INSTANCE, new JsonObject()).result().get());
             });
             var profiles = dietsCollector.prime();
             new DietProfileGenerator().generate((race, profile) -> {

src/main/java/com/minelittlepony/unicopia/datagen/providers/SeasonsModelGenerator.java

@@ -34,7 +34,7 @@ public class SeasonsModelGenerator extends UBlockStateModelGenerator {
     private static JsonObject createTextures(String season, JsonObject input) {
         JsonObject textures = new JsonObject();
         input.entrySet().forEach(entry -> {
-            textures.addProperty(entry.getKey(), new Identifier(entry.getValue().getAsString()).withPath(path -> path.replace("/", "/seasons/" + season + "/")).toString());
+            textures.addProperty(entry.getKey(), Identifier.of(entry.getValue().getAsString()).withPath(path -> path.replace("/", "/seasons/" + season + "/")).toString());
         });
         return textures;
     }

src/main/java/com/minelittlepony/unicopia/datagen/providers/UAdvancementsProvider.java

@@ -1,7 +1,9 @@
 package com.minelittlepony.unicopia.datagen.providers;
 
+import java.util.List;
 import java.util.Optional;
 import java.util.Set;
+import java.util.concurrent.CompletableFuture;
 import java.util.function.Consumer;
 import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.UTags;
@@ -35,18 +37,23 @@ import net.minecraft.predicate.NumberRange;
 import net.minecraft.predicate.TagPredicate;
 import net.minecraft.predicate.entity.DamageSourcePredicate;
 import net.minecraft.predicate.item.EnchantmentPredicate;
+import net.minecraft.predicate.item.EnchantmentsPredicate;
 import net.minecraft.predicate.item.ItemPredicate;
+import net.minecraft.predicate.item.ItemSubPredicateTypes;
 import net.minecraft.registry.Registries;
+import net.minecraft.registry.RegistryWrapper;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.registry.tag.TagKey;
 import net.minecraft.util.Identifier;
 
 public class UAdvancementsProvider extends FabricAdvancementProvider {
-    public UAdvancementsProvider(FabricDataOutput output) {
+    public UAdvancementsProvider(FabricDataOutput output, CompletableFuture<RegistryWrapper.WrapperLookup> registryLookup) {
-        super(output);
+        super(output, registryLookup);
     }
 
     @Override
-    public void generateAdvancement(Consumer<AdvancementEntry> consumer) {
+    public void generateAdvancement(WrapperLookup registryLookup, Consumer<AdvancementEntry> consumer) {
         AdvancementDisplayBuilder.create(UItems.ALICORN_BADGE).criterion("crafting_table", hasItems(Items.CRAFTING_TABLE)).build(consumer, "root").children(root -> {
             createTribeRootAdvancement(consumer, root, Race.EARTH).children(consumer, this::generateEarthTribeAdvancementsTree);
             createTribeRootAdvancement(consumer, root, Race.BAT).children(consumer, this::generateBatTribeAdvancementsTree);
@@ -195,7 +202,7 @@ public class UAdvancementsProvider extends FabricAdvancementProvider {
         AdvancementDisplayBuilder.create(Items.NETHERITE_SCRAP).showToast().announce()
             .criterion("enchant_with_consumption", enchant(UEnchantments.CONSUMPTION))
             .rewards(AdvancementRewards.Builder.experience(120))
-            .parent(new Identifier("story/enchant_item"))
+            .parent(Identifier.ofVanilla("story/enchant_item"))
             .group("enchanting")
             .build(consumer, "experimental")
             .child(Items.NETHERITE_PICKAXE)
@@ -207,7 +214,7 @@ public class UAdvancementsProvider extends FabricAdvancementProvider {
         AdvancementDisplayBuilder.create(Items.GOLDEN_APPLE).showToast().announce()
             .criterion("enchant_with_heart_bound", enchant(UEnchantments.HEART_BOUND))
             .rewards(AdvancementRewards.Builder.experience(120))
-            .parent(new Identifier("story/enchant_item"))
+            .parent(Identifier.ofVanilla("story/enchant_item"))
             .group("enchanting")
             .build(consumer, "hearts_stronger_than_horses")
             .child(Items.GOLDEN_PICKAXE)
@@ -218,11 +225,11 @@ public class UAdvancementsProvider extends FabricAdvancementProvider {
                 .build(consumer, "soulmate");
     }
 
-    public static AdvancementCriterion<?> enchant(Enchantment enchantment) {
+    public static AdvancementCriterion<?> enchant(RegistryEntry<Enchantment> enchantment) {
         return Criteria.ENCHANTED_ITEM.create(new EnchantedItemCriterion.Conditions(
                 Optional.empty(),
                 Optional.of(ItemPredicate.Builder.create()
-                    .enchantment(new EnchantmentPredicate(enchantment, NumberRange.IntRange.ANY))
+                    .subPredicate(ItemSubPredicateTypes.ENCHANTMENTS, EnchantmentsPredicate.enchantments(List.of(new EnchantmentPredicate(enchantment, NumberRange.IntRange.ANY))))
                     .build()),
                 NumberRange.IntRange.ANY
         ));

src/main/java/com/minelittlepony/unicopia/datagen/providers/UBlockStateModelGenerator.java

@@ -57,8 +57,8 @@ import static net.minecraft.data.client.VariantSettings.*;
 import static net.minecraft.data.client.VariantSettings.Rotation.*;
 
 public class UBlockStateModelGenerator extends BlockStateModelGenerator {
-    static final Identifier AIR_BLOCK_ID = new Identifier("block/air");
+    static final Identifier AIR_BLOCK_ID = Identifier.ofVanilla("block/air");
-    static final Identifier AIR_ITEM_ID = new Identifier("item/air");
+    static final Identifier AIR_ITEM_ID = Identifier.ofVanilla("item/air");
 
     static UBlockStateModelGenerator create(BlockStateModelGenerator modelGenerator) {
         return new UBlockStateModelGenerator(modelGenerator.blockStateCollector, modelGenerator.modelCollector, modelGenerator::excludeFromSimpleItemModelGeneration);
@@ -166,9 +166,9 @@ public class UBlockStateModelGenerator extends BlockStateModelGenerator {
 
         // bales
         registerAll((g, block) -> g.registerBale(Unicopia.id(block.getLeft().getPath().replace("bale", "block")), block.getLeft(), block.getRight()),
-                new Pair<>(new Identifier("hay_block"), "_top"),
+                new Pair<>(Identifier.ofVanilla("hay_block"), "_top"),
-                new Pair<>(new Identifier("farmersdelight", "rice_bale"), "_top"),
+                new Pair<>(Identifier.of("farmersdelight", "rice_bale"), "_top"),
-                new Pair<>(new Identifier("farmersdelight", "straw_bale"), "_end")
+                new Pair<>(Identifier.of("farmersdelight", "straw_bale"), "_end")
         );
         // shells
         registerAll(UBlockStateModelGenerator::registerShell, UBlocks.CLAM_SHELL, UBlocks.TURRET_SHELL, UBlocks.SCALLOP_SHELL);

src/main/java/com/minelittlepony/unicopia/datagen/providers/UPaintingVariantProvider.java

@@ -0,0 +1,60 @@
+package com.minelittlepony.unicopia.datagen.providers;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+import com.minelittlepony.unicopia.Unicopia;
+
+import net.fabricmc.fabric.api.datagen.v1.FabricDataOutput;
+import net.fabricmc.fabric.api.datagen.v1.provider.FabricDynamicRegistryProvider;
+import net.minecraft.entity.decoration.painting.PaintingVariant;
+import net.minecraft.registry.RegistryKey;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
+
+public class UPaintingVariantProvider extends FabricDynamicRegistryProvider {
+
+    private final List<RegistryKey<PaintingVariant>> keys = new ArrayList<>();
+
+    public UPaintingVariantProvider(FabricDataOutput output, CompletableFuture<WrapperLookup> registriesFuture) {
+        super(output, registriesFuture);
+    }
+
+    @Override
+    public String getName() {
+        return "Painting Variants";
+    }
+
+    public List<RegistryKey<PaintingVariant>> getKeys() {
+        return keys;
+    }
+
+    @Override
+    protected void configure(WrapperLookup registries, Entries entries) {
+        register(entries, "bloom", 2, 1);
+        register(entries, "chicken", 2, 1);
+        register(entries, "bells", 2, 1);
+
+        register(entries, "crystal", 3, 3);
+        register(entries, "harmony", 3, 3);
+
+        register(entries, "equality", 2, 4);
+        register(entries, "solar", 2, 4);
+        register(entries, "lunar", 2, 4);
+        register(entries, "platinum", 2, 4);
+        register(entries, "hurricane", 2, 4);
+        register(entries, "pudding", 2, 4);
+        register(entries, "terra", 2, 4);
+        register(entries, "equestria", 2, 4);
+
+        register(entries, "blossom", 2, 3);
+        register(entries, "shadow", 2, 3);
+    }
+
+    private void register(Entries entries, String name, int width, int height) {
+        RegistryKey<PaintingVariant> key = RegistryKey.of(RegistryKeys.PAINTING_VARIANT, Unicopia.id(name));
+        keys.add(key);
+        entries.add(key, new PaintingVariant(width, height, key.getValue()));
+    }
+}

src/main/java/com/minelittlepony/unicopia/datagen/providers/loot/UBlockAdditionsLootTableProvider.java

@@ -1,5 +1,6 @@
 package com.minelittlepony.unicopia.datagen.providers.loot;
 
+import java.util.concurrent.CompletableFuture;
 import java.util.function.Function;
 
 import com.minelittlepony.unicopia.UTags;
@@ -31,6 +32,7 @@ import net.minecraft.predicate.NumberRange;
 import net.minecraft.predicate.entity.LocationPredicate;
 import net.minecraft.predicate.item.EnchantmentPredicate;
 import net.minecraft.predicate.item.ItemPredicate;
+import net.minecraft.registry.RegistryWrapper;
 import net.minecraft.util.Identifier;
 import net.minecraft.world.biome.BiomeKeys;
 
@@ -44,8 +46,8 @@ public class UBlockAdditionsLootTableProvider extends FabricBlockLootTableProvid
             LocationCheckLootCondition.builder(LocationPredicate.Builder.create().biome(BiomeKeys.OCEAN))
         .or(LocationCheckLootCondition.builder(LocationPredicate.Builder.create().biome(BiomeKeys.BEACH)));
 
-    public UBlockAdditionsLootTableProvider(FabricDataOutput dataOutput) {
+    public UBlockAdditionsLootTableProvider(FabricDataOutput dataOutput, CompletableFuture<RegistryWrapper.WrapperLookup> registryLookup) {
-        super(dataOutput);
+        super(dataOutput, registryLookup);
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/datagen/providers/recipe/CraftingMaterialHelper.java

@@ -7,11 +7,11 @@ import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
 import com.minelittlepony.unicopia.recipe.CloudShapingRecipe;
 import com.mojang.datafixers.util.Either;
 
-import net.fabricmc.fabric.api.tag.convention.v1.ConventionalItemTags;
+import net.fabricmc.fabric.api.tag.convention.v2.ConventionalItemTags;
 import net.minecraft.advancement.AdvancementCriterion;
 import net.minecraft.data.server.recipe.RecipeProvider;
 import net.minecraft.data.server.recipe.ShapedRecipeJsonBuilder;
-import net.minecraft.data.server.recipe.SingleItemRecipeJsonBuilder;
+import net.minecraft.data.server.recipe.StonecuttingRecipeJsonBuilder;
 import net.minecraft.data.server.recipe.VanillaRecipeProvider;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemConvertible;
@@ -42,8 +42,8 @@ public interface CraftingMaterialHelper {
         }
         return Either.left(
             Registries.ITEM.getOrEmpty(id)
-                .or(() -> Registries.ITEM.getOrEmpty(new Identifier(Identifier.DEFAULT_NAMESPACE, id.getPath())))
+                .or(() -> Registries.ITEM.getOrEmpty(Identifier.ofVanilla(id.getPath())))
-                .or(() -> Registries.ITEM.getOrEmpty(new Identifier(Identifier.DEFAULT_NAMESPACE, id.getPath().replace(suffex, ""))))
+                .or(() -> Registries.ITEM.getOrEmpty(Identifier.ofVanilla(id.getPath().replace(suffex, ""))))
                 .orElseThrow(() -> new NoSuchElementException("No item with id " + id))
         );
     }
@@ -84,7 +84,7 @@ public interface CraftingMaterialHelper {
         return "has_" + spell.getId() + "_gemstone";
     }
 
-    static SingleItemRecipeJsonBuilder createCloudShaping(Ingredient input, RecipeCategory category, ItemConvertible output, int count) {
+    static StonecuttingRecipeJsonBuilder createCloudShaping(Ingredient input, RecipeCategory category, ItemConvertible output, int count) {
-        return new SingleItemRecipeJsonBuilder(category, CloudShapingRecipe::new, input, output, count);
+        return new StonecuttingRecipeJsonBuilder(category, CloudShapingRecipe::new, input, output, count);
     }
 }

src/main/java/com/minelittlepony/unicopia/datagen/providers/recipe/CuttingBoardRecipeJsonBuilder.java

@@ -7,6 +7,7 @@ import java.util.Map;
 import org.spongepowered.include.com.google.common.base.Preconditions;
 
 import com.mojang.serialization.Codec;
+import com.mojang.serialization.MapCodec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
 import net.minecraft.advancement.Advancement;
@@ -15,19 +16,21 @@ import net.minecraft.advancement.AdvancementRequirements;
 import net.minecraft.advancement.AdvancementRewards;
 import net.minecraft.advancement.criterion.RecipeUnlockedCriterion;
 import net.minecraft.data.server.recipe.RecipeExporter;
-import net.minecraft.inventory.Inventory;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemConvertible;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
 import net.minecraft.recipe.Ingredient;
 import net.minecraft.recipe.Recipe;
 import net.minecraft.recipe.RecipeSerializer;
 import net.minecraft.recipe.RecipeType;
-import net.minecraft.registry.DynamicRegistryManager;
+import net.minecraft.recipe.input.CraftingRecipeInput;
+import net.minecraft.recipe.input.RecipeInput;
 import net.minecraft.registry.Registries;
 import net.minecraft.registry.Registry;
 import net.minecraft.registry.RegistryKeys;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.registry.tag.TagKey;
 import net.minecraft.sound.SoundEvent;
 import net.minecraft.util.Identifier;
@@ -43,7 +46,7 @@ public class CuttingBoardRecipeJsonBuilder {
     private final List<Result> results = new ArrayList<>();
     private final List<Ingredient> ingredients = new ArrayList<>();
 
-    private Identifier sound = new Identifier("minecraft:item.axe.strip");
+    private Identifier sound = Identifier.ofVanilla("item.axe.strip");
 
     public static CuttingBoardRecipeJsonBuilder create(ItemConvertible output, TagKey<Item> tool) {
         return new CuttingBoardRecipeJsonBuilder(output, tool);
@@ -90,7 +93,7 @@ public class CuttingBoardRecipeJsonBuilder {
         exporter.accept(id,
             new CuttingBoardRecipe(
                     ingredients,
-                    new Tool(new Identifier("farmersdelight:tool"), tool),
+                    new Tool(Identifier.of("farmersdelight:tool"), tool),
                     sound,
                     results
             ),
@@ -103,7 +106,7 @@ public class CuttingBoardRecipeJsonBuilder {
     }
 
     public void offerTo(RecipeExporter exporter, String recipePath) {
-        Identifier recipeId = new Identifier(recipePath);
+        Identifier recipeId = Identifier.of(recipePath);
         if (recipeId.equals(Registries.ITEM.getId(output.asItem()))) {
             throw new IllegalStateException("Recipe " + recipePath + " should remove its 'save' argument as it is equal to default one");
         }
@@ -119,7 +122,7 @@ public class CuttingBoardRecipeJsonBuilder {
     public record Result(Identifier item, int count) {
         public static final Codec<Result> CODEC = RecordCodecBuilder.create(i -> i.group(
             Identifier.CODEC.fieldOf("item").forGetter(Result::item),
-            Codecs.createStrictOptionalFieldCodec(Codecs.POSITIVE_INT, "count", 1).forGetter(Result::count)
+            Codecs.POSITIVE_INT.optionalFieldOf("count", 1).forGetter(Result::count)
         ).apply(i, Result::new));
     }
 
@@ -128,8 +131,14 @@ public class CuttingBoardRecipeJsonBuilder {
             Tool tool,
             Identifier sound,
             List<Result> result
-        ) implements Recipe<Inventory> {
+        ) implements Recipe<CraftingRecipeInput> {
-        static final Identifier ID = new Identifier("farmersdelight", "cutting");
+        static final Identifier ID = Identifier.of("farmersdelight", "cutting");
+        static final MapCodec<CuttingBoardRecipe> CODEC = RecordCodecBuilder.mapCodec(i -> i.group(
+                Ingredient.DISALLOW_EMPTY_CODEC.listOf().fieldOf("ingredients").forGetter(CuttingBoardRecipe::ingredients),
+                Tool.CODEC.fieldOf("tool").forGetter(CuttingBoardRecipe::tool),
+                Identifier.CODEC.fieldOf("sound").forGetter(CuttingBoardRecipe::sound),
+                Result.CODEC.listOf().fieldOf("result").forGetter(CuttingBoardRecipe::result)
+        ).apply(i, CuttingBoardRecipe::new));
         static final RecipeType<CuttingBoardRecipe> TYPE = Registry.register(Registries.RECIPE_TYPE, ID, new RecipeType<>() {
             @Override
             public String toString() {
@@ -138,38 +147,39 @@ public class CuttingBoardRecipeJsonBuilder {
         });
         static final RecipeSerializer<CuttingBoardRecipe> SERIALIZER = Registry.register(Registries.RECIPE_SERIALIZER, ID, new RecipeSerializer<>() {
             @Override
-            public Codec<CuttingBoardRecipe> codec() { return CODEC; }
+            public MapCodec<CuttingBoardRecipe> codec() { return CODEC; }
-
             @Override
-            public CuttingBoardRecipe read(PacketByteBuf buf) { return null; }
+            public PacketCodec<RegistryByteBuf, CuttingBoardRecipe> packetCodec() { return null; }
-
-            @Override
-            public void write(PacketByteBuf buf, CuttingBoardRecipe recipe) { }
         });
-        static final Codec<CuttingBoardRecipe> CODEC = RecordCodecBuilder.create(i -> i.group(
-                Ingredient.DISALLOW_EMPTY_CODEC.listOf().fieldOf("ingredients").forGetter(CuttingBoardRecipe::ingredients),
-                Tool.CODEC.fieldOf("tool").forGetter(CuttingBoardRecipe::tool),
-                Identifier.CODEC.fieldOf("sound").forGetter(CuttingBoardRecipe::sound),
-                Result.CODEC.listOf().fieldOf("result").forGetter(CuttingBoardRecipe::result)
-        ).apply(i, CuttingBoardRecipe::new));
         public static void bootstrap() {}
 
         @Override
-        public boolean matches(Inventory inventory, World world) { return false; }
+        public boolean matches(CraftingRecipeInput inventory, World world) { return false; }
 
         @Override
-        public ItemStack craft(Inventory inventory, DynamicRegistryManager registryManager) { return ItemStack.EMPTY; }
+        public ItemStack craft(CraftingRecipeInput inventory, WrapperLookup registryManager) { return ItemStack.EMPTY; }
 
         @Override
         public boolean fits(int width, int height) { return false; }
 
         @Override
-        public ItemStack getResult(DynamicRegistryManager registryManager) { return ItemStack.EMPTY; }
+        public ItemStack getResult(WrapperLookup registryManager) { return ItemStack.EMPTY; }
 
         @Override
         public RecipeSerializer<?> getSerializer() { return SERIALIZER; }
 
         @Override
         public RecipeType<?> getType() { return TYPE; }
+
+        static class CuttingInput implements RecipeInput {
+            @Override
+            public ItemStack getStackInSlot(int slot) {
+                return null;
+            }
+            @Override
+            public int getSize() {
+                return 0;
+            }
+        }
     }
 }

src/main/java/com/minelittlepony/unicopia/datagen/providers/recipe/GrowingRecipeJsonBuilder.java

@@ -69,7 +69,7 @@ public class GrowingRecipeJsonBuilder {
     }
 
     public void offerTo(RecipeExporter exporter, String recipePath) {
-        Identifier recipeId = new Identifier(recipePath);
+        Identifier recipeId = Identifier.of(recipePath);
         Identifier id = Registries.BLOCK.getId(output.getBlock());
         if (recipeId.equals(id)) {
             throw new IllegalStateException("Recipe " + recipePath + " should remove its 'save' argument as it is equal to default one");

src/main/java/com/minelittlepony/unicopia/datagen/providers/recipe/SpellcraftingRecipeJsonBuilder.java

@@ -96,7 +96,7 @@ public class SpellcraftingRecipeJsonBuilder {
     }
 
     public void offerTo(RecipeExporter exporter, String recipePath) {
-        Identifier recipeId = new Identifier(recipePath);
+        Identifier recipeId = Identifier.of(recipePath);
         if (recipeId.equals(spell.getId())) {
             throw new IllegalStateException("Recipe " + recipePath + " should remove its 'save' argument as it is equal to default one");
         }

src/main/java/com/minelittlepony/unicopia/datagen/providers/recipe/URecipeProvider.java

@@ -4,6 +4,7 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
 import java.util.stream.Stream;
 
 import org.jetbrains.annotations.Nullable;
@@ -28,8 +29,8 @@ import com.mojang.datafixers.util.Either;
 
 import net.fabricmc.fabric.api.datagen.v1.FabricDataOutput;
 import net.fabricmc.fabric.api.datagen.v1.provider.FabricRecipeProvider;
-import net.fabricmc.fabric.api.resource.conditions.v1.DefaultResourceConditions;
+import net.fabricmc.fabric.api.resource.conditions.v1.ResourceConditions;
-import net.fabricmc.fabric.api.tag.convention.v1.ConventionalItemTags;
+import net.fabricmc.fabric.api.tag.convention.v2.ConventionalItemTags;
 import net.minecraft.advancement.AdvancementCriterion;
 import net.minecraft.advancement.criterion.Criteria;
 import net.minecraft.advancement.criterion.InventoryChangedCriterion;
@@ -49,6 +50,7 @@ import net.minecraft.predicate.item.ItemPredicate;
 import net.minecraft.recipe.Ingredient;
 import net.minecraft.recipe.book.RecipeCategory;
 import net.minecraft.registry.Registries;
+import net.minecraft.registry.RegistryWrapper;
 import net.minecraft.registry.tag.ItemTags;
 import net.minecraft.registry.tag.TagKey;
 import net.minecraft.resource.featuretoggle.FeatureSet;
@@ -57,8 +59,8 @@ import net.minecraft.util.Identifier;
 
 public class URecipeProvider extends FabricRecipeProvider {
     private static final List<Item> WOOLS = List.of(Items.BLACK_WOOL, Items.BLUE_WOOL, Items.BROWN_WOOL, Items.CYAN_WOOL, Items.GRAY_WOOL, Items.GREEN_WOOL, Items.LIGHT_BLUE_WOOL, Items.LIGHT_GRAY_WOOL, Items.LIME_WOOL, Items.MAGENTA_WOOL, Items.ORANGE_WOOL, Items.PINK_WOOL, Items.PURPLE_WOOL, Items.RED_WOOL, Items.YELLOW_WOOL, Items.WHITE_WOOL);
-    public URecipeProvider(FabricDataOutput output) {
+    public URecipeProvider(FabricDataOutput output, CompletableFuture<RegistryWrapper.WrapperLookup> registriesFuture) {
-        super(output);
+        super(output, registriesFuture);
     }
 
     @Override
@@ -90,7 +92,7 @@ public class URecipeProvider extends FabricRecipeProvider {
             .offerTo(exporter, convertBetween(UItems.SUNGLASSES, UItems.BROKEN_SUNGLASSES));
 
         // farmers delight
-        offerFarmersDelightCuttingRecipes(withConditions(exporter, DefaultResourceConditions.allModsLoaded("farmersdelight")));
+        offerFarmersDelightCuttingRecipes(withConditions(exporter, ResourceConditions.allModsLoaded("farmersdelight")));
     }
 
     private void generateVanillaRecipeExtensions(RecipeExporter exporter) {
@@ -732,7 +734,7 @@ public class URecipeProvider extends FabricRecipeProvider {
             CuttingBoardRecipeJsonBuilder.create(stripped, ItemTags.AXES)
                 .input(unstripped).criterion(hasItem(unstripped), conditionsFromItem(unstripped))
                 .sound(SoundEvents.ITEM_AXE_STRIP)
-                .result(new Identifier("farmersdelight:tree_bark"))
+                .result(Identifier.of("farmersdelight:tree_bark"))
                 .offerTo(exporter, convertBetween(stripped, unstripped));
         });
     }

src/main/java/com/minelittlepony/unicopia/datagen/providers/tag/SereneSeasonsTags.java

@@ -14,7 +14,7 @@ public interface SereneSeasonsTags {
         TagKey<Item> SUMMER_CROPS = item("summer_crops");
 
         private static TagKey<Item> item(String name) {
-            return TagKey.of(RegistryKeys.ITEM, new Identifier("sereneseasons", name));
+            return TagKey.of(RegistryKeys.ITEM, Identifier.of("sereneseasons", name));
         }
     }
 
@@ -25,7 +25,7 @@ public interface SereneSeasonsTags {
         TagKey<Block> SUMMER_CROPS = block("summer_crops");
 
         private static TagKey<Block> block(String name) {
-            return TagKey.of(RegistryKeys.BLOCK, new Identifier("sereneseasons", name));
+            return TagKey.of(RegistryKeys.BLOCK, Identifier.of("sereneseasons", name));
         }
     }
 

src/main/java/com/minelittlepony/unicopia/datagen/providers/tag/UBlockTagProvider.java

@@ -12,11 +12,10 @@ import com.minelittlepony.unicopia.server.world.UTreeGen;
 
 import net.fabricmc.fabric.api.datagen.v1.FabricDataOutput;
 import net.fabricmc.fabric.api.datagen.v1.provider.FabricTagProvider;
-import net.fabricmc.fabric.api.tag.convention.v1.ConventionalBlockTags;
+import net.fabricmc.fabric.api.tag.convention.v2.ConventionalBlockTags;
 import net.minecraft.block.Block;
 import net.minecraft.block.Blocks;
 import net.minecraft.registry.Registries;
-import net.minecraft.registry.RegistryKeys;
 import net.minecraft.registry.RegistryWrapper;
 import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.registry.tag.BlockTags;
@@ -101,7 +100,7 @@ public class UBlockTagProvider extends FabricTagProvider.BlockTagProvider {
         getOrCreateTagBuilder(UTags.Blocks.KICKS_UP_DUST).forceAddTag(BlockTags.SAND).add(
                 Blocks.SUSPICIOUS_SAND,
                 Blocks.GRAVEL, Blocks.SUSPICIOUS_GRAVEL
-        ).forceAddTag(TagKey.of(RegistryKeys.BLOCK, new Identifier("c", "concrete_powders")));
+        ).forceAddTag(ConventionalBlockTags.CONCRETES);
 
         getOrCreateTagBuilder(UTags.Blocks.UNAFFECTED_BY_GROW_ABILITY).add(Blocks.GRASS_BLOCK);
         addSeasonalCrops();
@@ -252,9 +251,7 @@ public class UBlockTagProvider extends FabricTagProvider.BlockTagProvider {
     }
 
     private void populateConventionalTags() {
-        getOrCreateTagBuilder(UConventionalTags.Blocks.CONCRETES).add(Arrays.stream(DyeColor.values()).map(i -> Registries.BLOCK.get(new Identifier(i.getName() + "_concrete"))).toArray(Block[]::new));
+        getOrCreateTagBuilder(UConventionalTags.Blocks.CONCRETE_POWDERS).add(Arrays.stream(DyeColor.values()).map(i -> Registries.BLOCK.get(Identifier.of(i.getName() + "_concrete_powder"))).toArray(Block[]::new));
-        getOrCreateTagBuilder(UConventionalTags.Blocks.CONCRETE_POWDERS).add(Arrays.stream(DyeColor.values()).map(i -> Registries.BLOCK.get(new Identifier(i.getName() + "_concrete_powder"))).toArray(Block[]::new));
-        getOrCreateTagBuilder(UConventionalTags.Blocks.GLAZED_TERRACOTTAS).add(Arrays.stream(DyeColor.values()).map(i -> Registries.BLOCK.get(new Identifier(i.getName() + "_glazed_terracotta"))).toArray(Block[]::new));
         getOrCreateTagBuilder(UConventionalTags.Blocks.CORAL_BLOCKS).add(Blocks.TUBE_CORAL_BLOCK, Blocks.BRAIN_CORAL_BLOCK, Blocks.BUBBLE_CORAL_BLOCK, Blocks.FIRE_CORAL_BLOCK, Blocks.HORN_CORAL_BLOCK);
         getOrCreateTagBuilder(UConventionalTags.Blocks.CORAL_FANS).add(Blocks.TUBE_CORAL_FAN, Blocks.BRAIN_CORAL_FAN, Blocks.BUBBLE_CORAL_FAN, Blocks.FIRE_CORAL_FAN, Blocks.HORN_CORAL_FAN);
         getOrCreateTagBuilder(UConventionalTags.Blocks.CORALS).add(Blocks.TUBE_CORAL, Blocks.BRAIN_CORAL, Blocks.BUBBLE_CORAL, Blocks.FIRE_CORAL, Blocks.HORN_CORAL);

src/main/java/com/minelittlepony/unicopia/datagen/providers/tag/UDimensionTypeTagProvider.java

@@ -18,18 +18,18 @@ public class UDimensionTypeTagProvider extends FabricTagProvider<DimensionType>
     @Override
     protected void configure(WrapperLookup lookup) {
         getOrCreateTagBuilder(UTags.DimensionTypes.HAS_NO_ATMOSPHERE)
-            .addOptional(new Identifier("ad_astra", "earth_orbit"))
+            .addOptional(Identifier.of("ad_astra", "earth_orbit"))
-            .addOptional(new Identifier("ad_astra", "glacio_orbit"))
+            .addOptional(Identifier.of("ad_astra", "glacio_orbit"))
-            .addOptional(new Identifier("ad_astra", "mars_orbit"))
+            .addOptional(Identifier.of("ad_astra", "mars_orbit"))
-            .addOptional(new Identifier("ad_astra", "mercury_orbit"))
+            .addOptional(Identifier.of("ad_astra", "mercury_orbit"))
-            .addOptional(new Identifier("ad_astra", "moon")).addOptional(new Identifier("adastra", "moon_orbit"))
+            .addOptional(Identifier.of("ad_astra", "moon")).addOptional(Identifier.of("adastra", "moon_orbit"))
-            .addOptional(new Identifier("ad_astra", "venus_orbit"))
+            .addOptional(Identifier.of("ad_astra", "venus_orbit"))
 
-            .addOptional(new Identifier("adastra", "earth_orbit"))
+            .addOptional(Identifier.of("adastra", "earth_orbit"))
-            .addOptional(new Identifier("adastra", "glacio_orbit"))
+            .addOptional(Identifier.of("adastra", "glacio_orbit"))
-            .addOptional(new Identifier("adastra", "mars_orbit"))
+            .addOptional(Identifier.of("adastra", "mars_orbit"))
-            .addOptional(new Identifier("adastra", "mercury_orbit"))
+            .addOptional(Identifier.of("adastra", "mercury_orbit"))
-            .addOptional(new Identifier("adastra", "moon")).addOptional(new Identifier("adastra", "moon_orbit"))
+            .addOptional(Identifier.of("adastra", "moon")).addOptional(Identifier.of("adastra", "moon_orbit"))
-            .addOptional(new Identifier("adastra", "venus_orbit"));
+            .addOptional(Identifier.of("adastra", "venus_orbit"));
     }
 }

src/main/java/com/minelittlepony/unicopia/datagen/providers/tag/UItemTagProvider.java

@@ -19,7 +19,7 @@ import com.minelittlepony.unicopia.server.world.UTreeGen;
 
 import net.fabricmc.fabric.api.datagen.v1.FabricDataOutput;
 import net.fabricmc.fabric.api.datagen.v1.provider.FabricTagProvider;
-import net.fabricmc.fabric.api.tag.convention.v1.ConventionalItemTags;
+import net.fabricmc.fabric.api.tag.convention.v2.ConventionalItemTags;
 import net.minecraft.block.Block;
 import net.minecraft.data.family.BlockFamily;
 import net.minecraft.item.Item;
@@ -67,7 +67,6 @@ public class UItemTagProvider extends FabricTagProvider.ItemTagProvider {
 
         getOrCreateTagBuilder(ItemTags.CHEST_BOATS).add(UItems.PALM_CHEST_BOAT);
         getOrCreateTagBuilder(ItemTags.BOATS).add(UItems.PALM_BOAT);
-        getOrCreateTagBuilder(ItemTags.MUSIC_DISCS).add(ItemFamilies.MUSIC_DISCS);
         getOrCreateTagBuilder(ItemTags.CREEPER_DROP_MUSIC_DISCS).add(UItems.MUSIC_DISC_CRUSADE, UItems.MUSIC_DISC_FUNK, UItems.MUSIC_DISC_PET, UItems.MUSIC_DISC_POPULAR);
 
         getOrCreateTagBuilder(ItemTags.SIGNS).add(UBlocks.PALM_SIGN.asItem());
@@ -76,8 +75,6 @@ public class UItemTagProvider extends FabricTagProvider.ItemTagProvider {
         getOrCreateTagBuilder(UTags.Items.HORSE_SHOES).add(ItemFamilies.HORSE_SHOES);
         getOrCreateTagBuilder(UTags.Items.POLEARMS).add(ItemFamilies.POLEARMS);
 
-        getOrCreateTagBuilder(ItemTags.TOOLS).addTag(UTags.Items.HORSE_SHOES).addTag(UTags.Items.POLEARMS);
-
         getOrCreateTagBuilder(UTags.Items.BASKETS).add(ItemFamilies.BASKETS);
         getOrCreateTagBuilder(UTags.Items.BADGES).add(Race.REGISTRY.stream()
                 .map(race -> race.getId().withPath(p -> p + "_badge"))
@@ -93,7 +90,7 @@ public class UItemTagProvider extends FabricTagProvider.ItemTagProvider {
 
         // technical tags
         getOrCreateTagBuilder(ItemTags.VILLAGER_PLANTABLE_SEEDS).addTag(UTags.Items.APPLE_SEEDS);
-        getOrCreateTagBuilder(UTags.Items.CAN_CUT_PIE).forceAddTag(ConventionalItemTags.SHEARS).addOptionalTag(UConventionalTags.Items.TOOL_KNIVES);
+        getOrCreateTagBuilder(UTags.Items.CAN_CUT_PIE).forceAddTag(ConventionalItemTags.SHEAR_TOOLS).addOptionalTag(UConventionalTags.Items.TOOL_KNIVES);
         getOrCreateTagBuilder(UTags.Items.COOLS_OFF_KIRINS).add(Items.MELON_SLICE, UItems.JUICE).forceAddTag(ConventionalItemTags.WATER_BUCKETS);
         getOrCreateTagBuilder(UTags.Items.FALLS_SLOWLY).add(Items.FEATHER, UItems.CLOUD_LUMP).forceAddTag(UTags.Items.MAGIC_FEATHERS);
         getOrCreateTagBuilder(UTags.Items.IS_DELIVERED_AGGRESSIVELY).forceAddTag(ItemTags.ANVIL);
@@ -125,8 +122,8 @@ public class UItemTagProvider extends FabricTagProvider.ItemTagProvider {
                     Items.GOLDEN_PICKAXE, Items.GOLDEN_SHOVEL, Items.GOLDEN_AXE, Items.GOLDEN_SWORD, Items.GOLDEN_HOE,
                     UItems.GOLDEN_HORSE_SHOE, UItems.GOLDEN_POLEARM, UItems.GOLDEN_FEATHER, UItems.GOLDEN_WING,
                     UItems.GOLDEN_OAK_SEEDS
-            ).forceAddTag(ConventionalItemTags.GOLD_INGOTS).forceAddTag(ConventionalItemTags.RAW_GOLD_ORES).forceAddTag(ConventionalItemTags.RAW_GOLD_BLOCKS)
+            ).forceAddTag(ConventionalItemTags.GOLD_INGOTS).forceAddTag(ConventionalItemTags.GOLD_RAW_MATERIALS).forceAddTag(ConventionalItemTags.STORAGE_BLOCKS_RAW_GOLD)
-            .addOptionalTag(new Identifier("farmersdelight:golden_knife"));
+            .addOptionalTag(Identifier.of("farmersdelight:golden_knife"));
         getOrCreateTagBuilder(UTags.Items.LOOT_BUG_EPIC_DROPS).add(
                 Items.DIAMOND_BLOCK,
                 Items.DIAMOND_HELMET, Items.DIAMOND_BOOTS, Items.DIAMOND_LEGGINGS, Items.DIAMOND_CHESTPLATE,
@@ -316,10 +313,10 @@ public class UItemTagProvider extends FabricTagProvider.ItemTagProvider {
         getOrCreateTagBuilder(UConventionalTags.Items.APPLES)
             .add(Items.APPLE, Items.GOLDEN_APPLE, Items.ENCHANTED_GOLDEN_APPLE, UItems.ROTTEN_APPLE)
             .forceAddTag(UTags.Items.FRESH_APPLES)
-            .addOptionalTag(new Identifier("c", "pyrite_apples")) // no idea which mod add pyrite apples
+            .addOptionalTag(Identifier.of("c", "pyrite_apples")) // no idea which mod add pyrite apples
         ;
         getOrCreateTagBuilder(UConventionalTags.Items.BANANAS).add(UItems.BANANA);
-        getOrCreateTagBuilder(UConventionalTags.Items.RAW_FISH).add(Items.COD, Items.SALMON, Items.PUFFERFISH, Items.TROPICAL_FISH).addOptionalTag(new Identifier("c", "mollusks"));
+        getOrCreateTagBuilder(UConventionalTags.Items.RAW_FISH).add(Items.COD, Items.SALMON, Items.PUFFERFISH, Items.TROPICAL_FISH).addOptionalTag(Identifier.of("c", "mollusks"));
         getOrCreateTagBuilder(UConventionalTags.Items.COOKED_FISH).add(Items.COOKED_COD, Items.COOKED_SALMON, UItems.COOKED_TROPICAL_FISH, UItems.COOKED_PUFFERFISH, UItems.FRIED_AXOLOTL);
         getOrCreateTagBuilder(UConventionalTags.Items.ROTTEN_FISH).add(UItems.ROTTEN_COD, UItems.ROTTEN_TROPICAL_FISH, UItems.ROTTEN_SALMON, UItems.ROTTEN_PUFFERFISH);
         getOrCreateTagBuilder(ItemTags.FISHES).add(
@@ -328,24 +325,24 @@ public class UItemTagProvider extends FabricTagProvider.ItemTagProvider {
         );
         getOrCreateTagBuilder(UConventionalTags.Items.COOKED_MEAT)
             .add(Items.COOKED_PORKCHOP, Items.COOKED_BEEF, Items.COOKED_MUTTON, Items.COOKED_RABBIT, Items.COOKED_CHICKEN, Items.RABBIT_STEW)
-            .addOptionalTag(new Identifier("c", "cooked_bacon"))
+            .addOptionalTag(Identifier.of("c", "cooked_bacon"))
-            .addOptionalTag(new Identifier("c", "cooked_beef"))
+            .addOptionalTag(Identifier.of("c", "cooked_beef"))
-            .addOptionalTag(new Identifier("c", "cooked_chicken"))
+            .addOptionalTag(Identifier.of("c", "cooked_chicken"))
-            .addOptionalTag(new Identifier("c", "cooked_mutton"))
+            .addOptionalTag(Identifier.of("c", "cooked_mutton"))
-            .addOptionalTag(new Identifier("c", "cooked_pork"))
+            .addOptionalTag(Identifier.of("c", "cooked_pork"))
-            .addOptionalTag(new Identifier("c", "fried_chickens"))
+            .addOptionalTag(Identifier.of("c", "fried_chickens"))
-            .addOptionalTag(new Identifier("c", "hamburgers"))
+            .addOptionalTag(Identifier.of("c", "hamburgers"))
-            .addOptionalTag(new Identifier("c", "pork_and_beans"))
+            .addOptionalTag(Identifier.of("c", "pork_and_beans"))
-            .addOptionalTag(new Identifier("c", "pork_jerkies"))
+            .addOptionalTag(Identifier.of("c", "pork_jerkies"))
-            .addOptionalTag(new Identifier("c", "protien"));
+            .addOptionalTag(Identifier.of("c", "protien"));
         getOrCreateTagBuilder(UConventionalTags.Items.RAW_MEAT)
             .add(Items.PORKCHOP, Items.BEEF, Items.MUTTON, Items.RABBIT, Items.CHICKEN)
-            .addOptionalTag(new Identifier("c", "raw_bacon"))
+            .addOptionalTag(Identifier.of("c", "raw_bacon"))
-            .addOptionalTag(new Identifier("c", "raw_beef"))
+            .addOptionalTag(Identifier.of("c", "raw_beef"))
-            .addOptionalTag(new Identifier("c", "raw_chicken"))
+            .addOptionalTag(Identifier.of("c", "raw_chicken"))
-            .addOptionalTag(new Identifier("c", "raw_mutton"))
+            .addOptionalTag(Identifier.of("c", "raw_mutton"))
-            .addOptionalTag(new Identifier("c", "raw_pork"))
+            .addOptionalTag(Identifier.of("c", "raw_pork"))
-            .addOptionalTag(new Identifier("c", "lemon_chickens"));
+            .addOptionalTag(Identifier.of("c", "lemon_chickens"));
         getOrCreateTagBuilder(UConventionalTags.Items.ROTTEN_MEAT).add(Items.ROTTEN_FLESH);
         getOrCreateTagBuilder(UConventionalTags.Items.ROTTEN_INSECT).add(Items.FERMENTED_SPIDER_EYE);
         getOrCreateTagBuilder(UConventionalTags.Items.COOKED_INSECT).add(UItems.COOKED_FROG_LEGS);
@@ -368,9 +365,9 @@ public class UItemTagProvider extends FabricTagProvider.ItemTagProvider {
         getOrCreateTagBuilder(UConventionalTags.Items.NUTS).add(UItems.BOWL_OF_NUTS)
             .addOptionalTag(UConventionalTags.Items.CROPS_PEANUTS)
             .forceAddTag(UConventionalTags.Items.ACORNS)
-            .addOptional(new Identifier("garnished", "nuts"))
+            .addOptional(Identifier.of("garnished", "nuts"))
-            .addOptional(new Identifier("garnished", "nut_mix"))
+            .addOptional(Identifier.of("garnished", "nut_mix"))
-            .addOptional(new Identifier("garnished", "neverable_delecacies"));
+            .addOptional(Identifier.of("garnished", "neverable_delecacies"));
         getOrCreateTagBuilder(UConventionalTags.Items.FRUITS)
             .add(Items.MELON_SLICE, Items.SWEET_BERRIES, Items.GLOW_BERRIES, Items.CHORUS_FRUIT)
             .add(UItems.JUICE, UItems.ZAP_APPLE, UItems.ZAP_BULB)
@@ -378,7 +375,7 @@ public class UItemTagProvider extends FabricTagProvider.ItemTagProvider {
             .forceAddTag(UConventionalTags.Items.PINEAPPLES)
             .forceAddTag(UConventionalTags.Items.APPLES)
             .forceAddTag(UConventionalTags.Items.BANANAS)
-            .addOptionalTag(new Identifier("garnished", "berries"));
+            .addOptionalTag(Identifier.of("garnished", "berries"));
         getOrCreateTagBuilder(UConventionalTags.Items.DESSERTS).add(Items.CAKE, UItems.APPLE_PIE_SLICE).forceAddTag(UTags.Items.PIES);
         getOrCreateTagBuilder(UConventionalTags.Items.CANDY).add(Items.SUGAR, UItems.ROCK_CANDY, UItems.CANDIED_APPLE);
         getOrCreateTagBuilder(UTags.Items.BAKED_GOODS).add(
@@ -391,78 +388,78 @@ public class UItemTagProvider extends FabricTagProvider.ItemTagProvider {
 
     private void exportFarmersDelightItems() {
         getOrCreateTagBuilder(UTags.Items.COOLS_OFF_KIRINS)
-            .addOptional(new Identifier("farmersdelight", "melon_popsicle"))
+            .addOptional(Identifier.of("farmersdelight", "melon_popsicle"))
-            .addOptional(new Identifier("farmersdelight", "melon_juice"));
+            .addOptional(Identifier.of("farmersdelight", "melon_juice"));
-        getOrCreateTagBuilder(TagKey.of(RegistryKeys.ITEM, new Identifier("farmersdelight", "cabbage_roll_ingredients"))).add(UItems.OATS, UItems.ROCK, UItems.WHEAT_WORMS);
+        getOrCreateTagBuilder(TagKey.of(RegistryKeys.ITEM, Identifier.of("farmersdelight", "cabbage_roll_ingredients"))).add(UItems.OATS, UItems.ROCK, UItems.WHEAT_WORMS);
-        getOrCreateTagBuilder(TagKey.of(RegistryKeys.ITEM, new Identifier("farmersdelight", "comfort_foods"))).add(UItems.OATMEAL, UItems.ROCK_STEW, UItems.MUFFIN);
+        getOrCreateTagBuilder(TagKey.of(RegistryKeys.ITEM, Identifier.of("farmersdelight", "comfort_foods"))).add(UItems.OATMEAL, UItems.ROCK_STEW, UItems.MUFFIN);
         getOrCreateTagBuilder(UConventionalTags.Items.RAW_FISH)
-            .addOptional(new Identifier("farmersdelight", "cod_roll"))
+            .addOptional(Identifier.of("farmersdelight", "cod_roll"))
-            .addOptional(new Identifier("farmersdelight", "salmon_roll"))
+            .addOptional(Identifier.of("farmersdelight", "salmon_roll"))
-            .addOptional(new Identifier("farmersdelight", "cod_slice"))
+            .addOptional(Identifier.of("farmersdelight", "cod_slice"))
-            .addOptional(new Identifier("farmersdelight", "salmon_slice"));
+            .addOptional(Identifier.of("farmersdelight", "salmon_slice"));
         getOrCreateTagBuilder(UConventionalTags.Items.COOKED_FISH)
-            .addOptional(new Identifier("farmersdelight", "fish_stew"))
+            .addOptional(Identifier.of("farmersdelight", "fish_stew"))
-            .addOptional(new Identifier("farmersdelight", "baked_cod_stew"))
+            .addOptional(Identifier.of("farmersdelight", "baked_cod_stew"))
-            .addOptional(new Identifier("farmersdelight", "grilled_salmon"));
+            .addOptional(Identifier.of("farmersdelight", "grilled_salmon"));
         getOrCreateTagBuilder(UConventionalTags.Items.RAW_MEAT)
-            .addOptional(new Identifier("farmersdelight", "ham"));
+            .addOptional(Identifier.of("farmersdelight", "ham"));
         getOrCreateTagBuilder(UConventionalTags.Items.COOKED_MEAT)
-            .addOptional(new Identifier("farmersdelight", "chicken_soup"))
+            .addOptional(Identifier.of("farmersdelight", "chicken_soup"))
-            .addOptional(new Identifier("farmersdelight", "bacon_and_eggs"))
+            .addOptional(Identifier.of("farmersdelight", "bacon_and_eggs"))
-            .addOptional(new Identifier("farmersdelight", "pasta_with_meatballs"))
+            .addOptional(Identifier.of("farmersdelight", "pasta_with_meatballs"))
-            .addOptional(new Identifier("farmersdelight", "beef_stew"))
+            .addOptional(Identifier.of("farmersdelight", "beef_stew"))
-            .addOptional(new Identifier("farmersdelight", "bone_broth"))
+            .addOptional(Identifier.of("farmersdelight", "bone_broth"))
-            .addOptional(new Identifier("farmersdelight", "mutton_wrap"))
+            .addOptional(Identifier.of("farmersdelight", "mutton_wrap"))
-            .addOptional(new Identifier("farmersdelight", "bacon_sandwich"))
+            .addOptional(Identifier.of("farmersdelight", "bacon_sandwich"))
-            .addOptional(new Identifier("farmersdelight", "hamburger"))
+            .addOptional(Identifier.of("farmersdelight", "hamburger"))
-            .addOptional(new Identifier("farmersdelight", "chicken_sandwich"))
+            .addOptional(Identifier.of("farmersdelight", "chicken_sandwich"))
-            .addOptional(new Identifier("farmersdelight", "barbecue_stick"))
+            .addOptional(Identifier.of("farmersdelight", "barbecue_stick"))
-            .addOptional(new Identifier("farmersdelight", "smoked_ham"))
+            .addOptional(Identifier.of("farmersdelight", "smoked_ham"))
-            .addOptional(new Identifier("farmersdelight", "honey_glazed_ham"))
+            .addOptional(Identifier.of("farmersdelight", "honey_glazed_ham"))
-            .addOptional(new Identifier("farmersdelight", "honey_glazed_ham_block"))
+            .addOptional(Identifier.of("farmersdelight", "honey_glazed_ham_block"))
-            .addOptional(new Identifier("farmersdelight", "roast_chicken"))
+            .addOptional(Identifier.of("farmersdelight", "roast_chicken"))
-            .addOptional(new Identifier("farmersdelight", "roast_chicken_block"))
+            .addOptional(Identifier.of("farmersdelight", "roast_chicken_block"))
-            .addOptional(new Identifier("farmersdelight", "steak_and_potatoes"))
+            .addOptional(Identifier.of("farmersdelight", "steak_and_potatoes"))
-            .addOptional(new Identifier("farmersdelight", "roasted_mutton_chops"))
+            .addOptional(Identifier.of("farmersdelight", "roasted_mutton_chops"))
-            .addOptional(new Identifier("farmersdelight", "pasta_with_mutton_chop"));
+            .addOptional(Identifier.of("farmersdelight", "pasta_with_mutton_chop"));
         getOrCreateTagBuilder(UConventionalTags.Items.FRUITS)
-            .addOptional(new Identifier("farmersdelight", "pumpkin_slice"))
+            .addOptional(Identifier.of("farmersdelight", "pumpkin_slice"))
-            .addOptional(new Identifier("farmersdelight", "tomato"))
+            .addOptional(Identifier.of("farmersdelight", "tomato"))
-            .addOptional(new Identifier("farmersdelight", "melon_juice"))
+            .addOptional(Identifier.of("farmersdelight", "melon_juice"))
-            .addOptional(new Identifier("farmersdelight", "fruit_salad"));
+            .addOptional(Identifier.of("farmersdelight", "fruit_salad"));
         getOrCreateTagBuilder(UConventionalTags.Items.DESSERTS)
-            .addOptional(new Identifier("farmersdelight", "sweet_berry_cheesecake"))
+            .addOptional(Identifier.of("farmersdelight", "sweet_berry_cheesecake"))
-            .addOptional(new Identifier("farmersdelight", "sweet_berry_cheesecake_slice"))
+            .addOptional(Identifier.of("farmersdelight", "sweet_berry_cheesecake_slice"))
-            .addOptional(new Identifier("farmersdelight", "chocolate_pie_slice"))
+            .addOptional(Identifier.of("farmersdelight", "chocolate_pie_slice"))
-            .addOptional(new Identifier("farmersdelight", "cake_slice"))
+            .addOptional(Identifier.of("farmersdelight", "cake_slice"))
-            .addOptional(new Identifier("farmersdelight", "apple_pie_slice"))
+            .addOptional(Identifier.of("farmersdelight", "apple_pie_slice"))
-            .addOptional(new Identifier("farmersdelight", "glow_berry_custard"));
+            .addOptional(Identifier.of("farmersdelight", "glow_berry_custard"));
         getOrCreateTagBuilder(UConventionalTags.Items.COOKIES)
-            .addOptional(new Identifier("farmersdelight", "sweet_berry_cookie"))
+            .addOptional(Identifier.of("farmersdelight", "sweet_berry_cookie"))
-            .addOptional(new Identifier("farmersdelight", "honey_cookie"));
+            .addOptional(Identifier.of("farmersdelight", "honey_cookie"));
         getOrCreateTagBuilder(UTags.Items.BAKED_GOODS)
-            .addOptional(new Identifier("farmersdelight", "wheat_dough"))
+            .addOptional(Identifier.of("farmersdelight", "wheat_dough"))
-            .addOptional(new Identifier("farmersdelight", "raw_pasta"))
+            .addOptional(Identifier.of("farmersdelight", "raw_pasta"))
-            .addOptional(new Identifier("farmersdelight", "pie_crust"))
+            .addOptional(Identifier.of("farmersdelight", "pie_crust"))
-            .addOptional(new Identifier("farmersdelight", "egg_sandwich"));
+            .addOptional(Identifier.of("farmersdelight", "egg_sandwich"));
         getOrCreateTagBuilder(UTags.Items.HIGH_QUALITY_SEA_VEGETABLES)
-            .addOptional(new Identifier("farmersdelight", "kelp_roll"));
+            .addOptional(Identifier.of("farmersdelight", "kelp_roll"));
         getOrCreateTagBuilder(UTags.Items.LOW_QUALITY_SEA_VEGETABLES)
-            .addOptional(new Identifier("farmersdelight", "kelp_roll_slice"));
+            .addOptional(Identifier.of("farmersdelight", "kelp_roll_slice"));
         getOrCreateTagBuilder(UTags.Items.FORAGE_FILLING)
-            .addOptional(new Identifier("farmersdelight", "horse_feed"))
+            .addOptional(Identifier.of("farmersdelight", "horse_feed"))
-            .addOptional(new Identifier("farmersdelight", "rice_bale"))
+            .addOptional(Identifier.of("farmersdelight", "rice_bale"))
-            .addOptional(new Identifier("farmersdelight", "straw_bale"));
+            .addOptional(Identifier.of("farmersdelight", "straw_bale"));
         getOrCreateTagBuilder(UTags.Items.FORAGE_SAFE)
-            .addOptional(new Identifier("farmersdelight", "sandy_shrub"))
+            .addOptional(Identifier.of("farmersdelight", "sandy_shrub"))
-            .addOptional(new Identifier("farmersdelight", "wild_cabbages"))
+            .addOptional(Identifier.of("farmersdelight", "wild_cabbages"))
-            .addOptional(new Identifier("farmersdelight", "wild_onions"))
+            .addOptional(Identifier.of("farmersdelight", "wild_onions"))
-            .addOptional(new Identifier("farmersdelight", "wild_carrots"))
+            .addOptional(Identifier.of("farmersdelight", "wild_carrots"))
-            .addOptional(new Identifier("farmersdelight", "wild_beetroots"))
+            .addOptional(Identifier.of("farmersdelight", "wild_beetroots"))
-            .addOptional(new Identifier("farmersdelight", "wild_rice"));
+            .addOptional(Identifier.of("farmersdelight", "wild_rice"));
         getOrCreateTagBuilder(UTags.Items.FORAGE_RISKY)
-            .addOptional(new Identifier("farmersdelight", "wild_tomatoes"))
+            .addOptional(Identifier.of("farmersdelight", "wild_tomatoes"))
-            .addOptional(new Identifier("farmersdelight", "wild_potatoes"))
+            .addOptional(Identifier.of("farmersdelight", "wild_potatoes"))
-            .addOptionalTag(new Identifier("c", "meads"));
+            .addOptionalTag(Identifier.of("c", "meads"));
     }
 }

src/main/java/com/minelittlepony/unicopia/datagen/providers/tag/UPaintingVariantTagProvider.java

@@ -2,7 +2,7 @@ package com.minelittlepony.unicopia.datagen.providers.tag;
 
 import java.util.concurrent.CompletableFuture;
 
-import com.minelittlepony.unicopia.entity.mob.UEntities;
+import com.minelittlepony.unicopia.datagen.providers.UPaintingVariantProvider;
 
 import net.fabricmc.fabric.api.datagen.v1.FabricDataOutput;
 import net.fabricmc.fabric.api.datagen.v1.provider.FabricTagProvider;
@@ -12,12 +12,16 @@ import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.registry.tag.PaintingVariantTags;
 
 public class UPaintingVariantTagProvider extends FabricTagProvider<PaintingVariant> {
-    public UPaintingVariantTagProvider(FabricDataOutput output, CompletableFuture<WrapperLookup> registriesFuture) {
+
+    private final UPaintingVariantProvider provider;
+
+    public UPaintingVariantTagProvider(FabricDataOutput output, CompletableFuture<WrapperLookup> registriesFuture, UPaintingVariantProvider provider) {
         super(output, RegistryKeys.PAINTING_VARIANT, registriesFuture);
+        this.provider = provider;
     }
 
     @Override
     protected void configure(WrapperLookup lookup) {
-        getOrCreateTagBuilder(PaintingVariantTags.PLACEABLE).add(UEntities.Paintings.REGISTRY.toArray(PaintingVariant[]::new));
+        getOrCreateTagBuilder(PaintingVariantTags.PLACEABLE).add(provider.getKeys());
     }
 }

src/main/java/com/minelittlepony/unicopia/datagen/providers/tag/UStatusEffectTagProvider.java

@@ -17,6 +17,8 @@ public class UStatusEffectTagProvider extends FabricTagProvider<StatusEffect> {
 
     @Override
     protected void configure(WrapperLookup lookup) {
-        getOrCreateTagBuilder(UTags.StatusEffects.PINEAPPLE_EFFECTS).add(StatusEffects.REGENERATION, StatusEffects.ABSORPTION, StatusEffects.LUCK, StatusEffects.HASTE);
+        getOrCreateTagBuilder(UTags.StatusEffects.PINEAPPLE_EFFECTS).add(
+                StatusEffects.REGENERATION.value(), StatusEffects.ABSORPTION.value(), StatusEffects.LUCK.value(), StatusEffects.HASTE.value()
+        );
     }
 }

src/main/java/com/minelittlepony/unicopia/diet/Ailment.java

@@ -1,22 +1,17 @@
 package com.minelittlepony.unicopia.diet;
 
 import com.minelittlepony.unicopia.diet.affliction.Affliction;
+import com.minelittlepony.unicopia.diet.affliction.EmptyAffliction;
 import com.mojang.serialization.Codec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
 
 public record Ailment(Affliction effects) {
-    public static final Ailment EMPTY = new Ailment(Affliction.EMPTY);
+    public static final Ailment EMPTY = new Ailment(EmptyAffliction.INSTANCE);
     public static final Codec<Ailment> CODEC = RecordCodecBuilder.create(instance -> instance.group(
             Affliction.CODEC.fieldOf("effects").forGetter(Ailment::effects)
     ).apply(instance, Ailment::new));
-
+    public static final PacketCodec<RegistryByteBuf, Ailment> PACKET_CODEC = Affliction.PACKET_CODEC.xmap(Ailment::new, Ailment::effects);
-    public Ailment(PacketByteBuf buffer) {
-        this(Affliction.read(buffer));
-    }
-
-    public void toBuffer(PacketByteBuf buffer) {
-        Affliction.write(buffer, effects);
-    }
 }

src/main/java/com/minelittlepony/unicopia/diet/DietProfile.java

@@ -16,11 +16,14 @@ import com.mojang.datafixers.util.Pair;
 import com.mojang.serialization.Codec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
-import net.minecraft.client.item.TooltipContext;
+import net.minecraft.component.DataComponentTypes;
+import net.minecraft.component.type.FoodComponent;
 import net.minecraft.entity.player.PlayerEntity;
-import net.minecraft.item.FoodComponent;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.item.tooltip.TooltipType;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
 import net.minecraft.util.Identifier;
@@ -38,17 +41,17 @@ public record DietProfile(
                 Codec.FLOAT.fieldOf("default_multiplier").forGetter(DietProfile::defaultMultiplier),
                 Codec.FLOAT.fieldOf("foraging_multiplier").forGetter(DietProfile::foragingMultiplier),
                 Codec.list(Multiplier.CODEC).fieldOf("multipliers").forGetter(DietProfile::multipliers),
-                Codec.list(FoodGroupEffects.CODEC).fieldOf("effects").forGetter(DietProfile::effects),
+                Codec.list(FoodGroupEffects.createCodec(FoodGroupKey.CODEC)).fieldOf("effects").forGetter(DietProfile::effects),
-                FoodGroupEffects.CODEC.optionalFieldOf("default_effect").forGetter(DietProfile::defaultEffect)
+                FoodGroupEffects.createCodec(FoodGroupKey.CODEC).optionalFieldOf("default_effect").forGetter(DietProfile::defaultEffect)
     ).apply(instance, DietProfile::new));
-
+    public static final PacketCodec<RegistryByteBuf, DietProfile> PACKET_CODEC = PacketCodec.tuple(
-    public DietProfile(PacketByteBuf buffer) {
+            PacketCodecs.FLOAT, DietProfile::defaultMultiplier,
-        this(buffer.readFloat(), buffer.readFloat(),
+            PacketCodecs.FLOAT, DietProfile::foragingMultiplier,
-                buffer.readList(Multiplier::new),
+            Multiplier.PACKET_CODEC.collect(PacketCodecs.toList()), DietProfile::multipliers,
-                buffer.readList(b -> new FoodGroupEffects(b, FoodGroupKey.LOOKUP)),
+            FoodGroupEffects.createPacketCodec(FoodGroupKey.PACKET_CODEC).collect(PacketCodecs.toList()), DietProfile::effects,
-                buffer.readOptional(b -> new FoodGroupEffects(b, FoodGroupKey.LOOKUP))
+            PacketCodecs.optional(FoodGroupEffects.createPacketCodec(FoodGroupKey.PACKET_CODEC)), DietProfile::defaultEffect,
+            DietProfile::new
     );
-    }
 
     public void validate(Consumer<String> issues, Predicate<Identifier> foodGroupExists) {
         multipliers.stream().flatMap(i -> i.tags().stream()).forEach(key -> {
@@ -68,14 +71,6 @@ public record DietProfile(
         });
     }
 
-    public void toBuffer(PacketByteBuf buffer) {
-        buffer.writeFloat(defaultMultiplier);
-        buffer.writeFloat(foragingMultiplier);
-        buffer.writeCollection(multipliers, (b, t) -> t.toBuffer(b));
-        buffer.writeCollection(effects, (b, t) -> t.toBuffer(b));
-        buffer.writeOptional(defaultEffect, (b, t) -> t.toBuffer(b));
-    }
-
     public Optional<Multiplier> findMultiplier(ItemStack stack) {
         return multipliers.stream().filter(m -> m.test(stack)).findFirst();
     }
@@ -90,7 +85,7 @@ public record DietProfile(
 
     @Nullable
     public FoodComponent getAdjustedFoodComponent(ItemStack stack) {
-        var food = stack.getItem().getFoodComponent();
+        var food = stack.get(DataComponentTypes.FOOD);
         if (this == EMPTY) {
             return food;
         }
@@ -100,13 +95,17 @@ public record DietProfile(
             return null;
         }
 
-        float hunger = food.getHunger() * ratios.getFirst();
+        float hunger = food.nutrition() * ratios.getFirst();
         int baseline = (int)hunger;
 
-        return FoodAttributes.copy(food)
+        return new FoodComponent(
-            .hunger(Math.max(1, (hunger - baseline) >= 0.5F ? baseline + 1 : baseline))
+            Math.max(1, (hunger - baseline) >= 0.5F ? baseline + 1 : baseline),
-            .saturationModifier(food.getSaturationModifier() * ratios.getSecond())
+            food.saturation() * ratios.getSecond(),
-            .build();
+            food.canAlwaysEat(),
+            food.eatSeconds(),
+            food.usingConvertsTo(),
+            food.effects()
+        );
     }
 
     public boolean isInedible(ItemStack stack) {
@@ -126,8 +125,8 @@ public record DietProfile(
         return Pair.of(hungerMultiplier, saturationMultiplier);
     }
 
-    public void appendTooltip(ItemStack stack, @Nullable PlayerEntity user, List<Text> tooltip, TooltipContext context) {
+    public void appendTooltip(ItemStack stack, @Nullable PlayerEntity user, List<Text> tooltip, TooltipType context) {
-        var food = stack.getItem().getFoodComponent();
+        var food = stack.get(DataComponentTypes.FOOD);
 
         var ratios = getRatios(stack);
         if (food == null || isInedible(ratios)) {
@@ -142,8 +141,8 @@ public record DietProfile(
         if (context.isAdvanced()) {
             var nonAdjustedFood = getNonAdjustedFoodComponent(stack, user).orElse(food);
             tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.base_multiplier", baseMultiplier).formatted(Formatting.DARK_GRAY)));
-            tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.hunger.detailed", food.getHunger(), nonAdjustedFood.getHunger(), (int)(ratios.getFirst() * 100))).formatted(Formatting.DARK_GRAY));
+            tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.hunger.detailed", food.nutrition(), nonAdjustedFood.nutrition(), (int)(ratios.getFirst() * 100))).formatted(Formatting.DARK_GRAY));
-            tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.saturation.detailed", food.getSaturationModifier(), nonAdjustedFood.getSaturationModifier(), (int)(ratios.getSecond() * 100))).formatted(Formatting.DARK_GRAY));
+            tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.saturation.detailed", food.saturation(), nonAdjustedFood.saturation(), (int)(ratios.getSecond() * 100))).formatted(Formatting.DARK_GRAY));
         } else {
             tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.hunger", (int)(ratios.getFirst() * 100))).formatted(Formatting.DARK_GRAY));
             tooltip.add(Text.literal(" ").append(Text.translatable("unicopia.diet.saturation", (int)(ratios.getSecond() * 100))).formatted(Formatting.DARK_GRAY));
@@ -178,22 +177,18 @@ public record DietProfile(
                 Codec.FLOAT.fieldOf("hunger").forGetter(Multiplier::hunger),
                 Codec.FLOAT.fieldOf("saturation").forGetter(Multiplier::saturation)
         ).apply(instance, Multiplier::new));
-
+        public static final PacketCodec<RegistryByteBuf, Multiplier> PACKET_CODEC = PacketCodec.tuple(
-        public Multiplier(PacketByteBuf buffer) {
+                FoodGroupKey.PACKET_CODEC.collect(PacketCodecs.toCollection(HashSet::new)), Multiplier::tags,
-            this(buffer.readCollection(HashSet::new, p -> FoodGroupKey.LOOKUP.apply(p.readIdentifier())), buffer.readFloat(), buffer.readFloat());
+                PacketCodecs.FLOAT, Multiplier::hunger,
-        }
+                PacketCodecs.FLOAT, Multiplier::saturation,
+                Multiplier::new
+        );
 
         @Override
         public boolean test(ItemStack stack) {
             return tags.stream().anyMatch(tag -> tag.contains(stack));
         }
 
-        public void toBuffer(PacketByteBuf buffer) {
-            buffer.writeCollection(tags, (p, t) -> p.writeIdentifier(t.id()));
-            buffer.writeFloat(hunger);
-            buffer.writeFloat(saturation);
-        }
-
         public static final class Builder {
             private Set<FoodGroupKey> tags = new HashSet<>();
             private float hunger = 1;

src/main/java/com/minelittlepony/unicopia/diet/DietView.java

@@ -3,10 +3,10 @@ package com.minelittlepony.unicopia.diet;
 import java.util.List;
 import org.jetbrains.annotations.Nullable;
 
-import net.minecraft.client.item.TooltipContext;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.text.Text;
 import net.minecraft.util.Hand;
 import net.minecraft.util.TypedActionResult;
@@ -17,7 +17,7 @@ public interface DietView {
 
     void finishUsing(ItemStack stack, World world, LivingEntity entity);
 
-    void appendTooltip(ItemStack stack, @Nullable PlayerEntity user, List<Text> tooltip, TooltipContext context);
+    void appendTooltip(ItemStack stack, @Nullable PlayerEntity user, List<Text> tooltip, TooltipType context);
 
     interface Holder {
         default DietView getDiets(ItemStack stack) {

src/main/java/com/minelittlepony/unicopia/diet/DietsLoader.java

@@ -33,11 +33,11 @@ public class DietsLoader implements IdentifiableResourceReloadListener {
             Profiler prepareProfiler, Profiler applyProfiler,
             Executor prepareExecutor, Executor applyExecutor) {
 
-        CompletableFuture<Map<Identifier, Effect>> foodGroupsFuture = CompletableFuture.supplyAsync(() -> {
+        CompletableFuture<Map<Identifier, FoodGroup>> foodGroupsFuture = CompletableFuture.supplyAsync(() -> {
-            Map<Identifier, Effect> foodGroups = new HashMap<>();
+            Map<Identifier, FoodGroup> foodGroups = new HashMap<>();
             for (var group : loadData(manager, prepareExecutor, "diet/food_groups").entrySet()) {
                 try {
-                    FoodGroup.CODEC.parse(JsonOps.INSTANCE, group.getValue())
+                    FoodGroup.EFFECTS_CODEC.parse(JsonOps.INSTANCE, group.getValue())
                         .resultOrPartial(error -> LOGGER.error("Could not load food group {}: {}", group.getKey(), error))
                         .ifPresent(value -> {
                             foodGroups.put(group.getKey(), new FoodGroup(group.getKey(), value));

src/main/java/com/minelittlepony/unicopia/diet/Effect.java

@@ -4,10 +4,10 @@ import java.util.List;
 import java.util.Optional;
 import java.util.function.Predicate;
 
-import net.minecraft.client.item.TooltipContext;
+import net.minecraft.component.DataComponentTypes;
-import net.minecraft.item.FoodComponent;
+import net.minecraft.component.type.FoodComponent;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
 import net.minecraft.util.UseAction;
@@ -21,16 +21,16 @@ public interface Effect extends Predicate<ItemStack> {
 
     Ailment ailment();
 
-    default void appendTooltip(ItemStack stack, List<Text> tooltip, TooltipContext context) {
+    default void appendTooltip(ItemStack stack, List<Text> tooltip, TooltipType context) {
         if (!test(stack)) {
-            if (stack.isFood()) {
+            if (stack.contains(DataComponentTypes.FOOD)) {
                 tooltip.add(Text.literal(" ").append(Text.translatable("food_group.unicopia.misc")).formatted(Formatting.GRAY));
             } else if (stack.getUseAction() == UseAction.DRINK) {
                 tooltip.add(Text.literal(" ").append(Text.translatable("food_group.unicopia.drinks")).formatted(Formatting.GRAY));
             }
         }
 
-        if (context.isAdvanced() && stack.isFood()) {
+        if (context.isAdvanced() && stack.contains(DataComponentTypes.FOOD)) {
             if (!ailment().effects().isEmpty()) {
                 tooltip.add(Text.translatable("unicopia.diet.side_effects").formatted(Formatting.DARK_PURPLE));
                 ailment().effects().appendTooltip(tooltip);
@@ -38,12 +38,6 @@ public interface Effect extends Predicate<ItemStack> {
         }
     }
 
-    default void toBuffer(PacketByteBuf buffer) {
-        buffer.writeCollection(tags(), (b, t) -> b.writeIdentifier(t.id()));
-        buffer.writeOptional(foodComponent(), FoodAttributes::write);
-        ailment().toBuffer(buffer);
-    }
-
     @Override
     default boolean test(ItemStack stack) {
         return tags().stream().anyMatch(tag -> tag.contains(stack));

src/main/java/com/minelittlepony/unicopia/diet/FoodAttributes.java

@@ -7,6 +7,7 @@ import com.mojang.serialization.codecs.RecordCodecBuilder;
 
 import net.minecraft.component.type.FoodComponent;
 import net.minecraft.item.ItemStack;
+import net.minecraft.network.PacketByteBuf;
 import net.minecraft.network.RegistryByteBuf;
 
 final class FoodAttributes {
@@ -21,12 +22,12 @@ final class FoodAttributes {
     }));
 
     @Deprecated
-    static FoodComponent read(RegistryByteBuf buffer) {
+    static FoodComponent read(PacketByteBuf buffer) {
-        return FoodComponent.PACKET_CODEC.decode(buffer);
+        return FoodComponent.PACKET_CODEC.decode((RegistryByteBuf)buffer);
     }
 
     @Deprecated
-    static void write(RegistryByteBuf buffer, FoodComponent food) {
+    static void write(PacketByteBuf buffer, FoodComponent food) {
-        FoodComponent.PACKET_CODEC.encode(buffer, food);
+        FoodComponent.PACKET_CODEC.encode((RegistryByteBuf)buffer, food);
     }
 }

src/main/java/com/minelittlepony/unicopia/diet/FoodGroup.java

@@ -4,12 +4,11 @@ import java.util.List;
 import java.util.Optional;
 
 import com.mojang.serialization.Codec;
-import com.mojang.serialization.codecs.RecordCodecBuilder;
+import net.minecraft.component.type.FoodComponent;
-
-import net.minecraft.client.item.TooltipContext;
-import net.minecraft.item.FoodComponent;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.item.tooltip.TooltipType;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
 import net.minecraft.util.Identifier;
@@ -18,15 +17,12 @@ import net.minecraft.util.Util;
 public record FoodGroup(
         Identifier id,
         FoodGroupEffects attributes) implements Effect {
-    public static final Codec<FoodGroupEffects> CODEC = RecordCodecBuilder.create(instance -> instance.group(
+    public static final Codec<FoodGroupEffects> EFFECTS_CODEC = FoodGroupEffects.createCodec(FoodGroupKey.TAG_CODEC);
-            FoodGroupKey.TAG_CODEC.listOf().fieldOf("tags").forGetter(FoodGroupEffects::tags),
+    public static final PacketCodec<RegistryByteBuf, FoodGroup> PACKET_CODEC = PacketCodec.tuple(
-            FoodAttributes.CODEC.optionalFieldOf("food_component").forGetter(FoodGroupEffects::foodComponent),
+            Identifier.PACKET_CODEC, FoodGroup::id,
-            Ailment.CODEC.fieldOf("ailment").forGetter(FoodGroupEffects::ailment)
+            FoodGroupEffects.createPacketCodec(FoodGroupKey.TAG_PACKET_CODEC), FoodGroup::attributes,
-    ).apply(instance, FoodGroupEffects::new));
+            FoodGroup::new
-
+    );
-    public FoodGroup(PacketByteBuf buffer) {
-        this(buffer.readIdentifier(), new FoodGroupEffects(buffer, FoodGroupKey.TAG_ID_LOOKUP));
-    }
 
     @Override
     public List<FoodGroupKey> tags() {
@@ -43,14 +39,8 @@ public record FoodGroup(
         return attributes.ailment();
     }
     @Override
-    public void appendTooltip(ItemStack stack, List<Text> tooltip, TooltipContext context) {
+    public void appendTooltip(ItemStack stack, List<Text> tooltip, TooltipType context) {
         tooltip.add(Text.literal(" ").append(Text.translatable(Util.createTranslationKey("food_group", id()))).formatted(Formatting.GRAY));
         Effect.super.appendTooltip(stack, tooltip, context);
     }
-
-    @Override
-    public void toBuffer(PacketByteBuf buffer) {
-        buffer.writeIdentifier(id());
-        Effect.super.toBuffer(buffer);
-    }
 }

src/main/java/com/minelittlepony/unicopia/diet/FoodGroupEffects.java

@@ -3,17 +3,19 @@ package com.minelittlepony.unicopia.diet;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
-import java.util.function.Function;
-
 import com.minelittlepony.unicopia.diet.affliction.Affliction;
 import com.minelittlepony.unicopia.item.UFoodComponents;
 import com.mojang.serialization.Codec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
+import io.netty.buffer.ByteBuf;
 import net.minecraft.component.type.FoodComponent;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.item.tooltip.TooltipType;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.registry.RegistryKeys;
 import net.minecraft.registry.tag.TagKey;
 import net.minecraft.text.Text;
@@ -26,18 +28,24 @@ public record FoodGroupEffects(
         Optional<FoodComponent> foodComponent,
         Ailment ailment
 ) implements Effect {
-    public static final Codec<FoodGroupEffects> CODEC = RecordCodecBuilder.create(instance -> instance.group(
+    public static Codec<FoodGroupEffects> createCodec(Codec<FoodGroupKey> keyCodec) {
-            FoodGroupKey.CODEC.listOf().fieldOf("tags").forGetter(FoodGroupEffects::tags),
+        return RecordCodecBuilder.create(instance -> instance.group(
+                keyCodec.listOf().fieldOf("tags").forGetter(FoodGroupEffects::tags),
                 FoodAttributes.CODEC.optionalFieldOf("food_component").forGetter(FoodGroupEffects::foodComponent),
                 Ailment.CODEC.fieldOf("ailment").forGetter(FoodGroupEffects::ailment)
         ).apply(instance, FoodGroupEffects::new));
-
+    }
-    public FoodGroupEffects(PacketByteBuf buffer, Function<Identifier, FoodGroupKey> lookup) {
+    public static final PacketCodec<RegistryByteBuf, FoodGroupEffects> createPacketCodec(PacketCodec<ByteBuf, FoodGroupKey> keyCodec) {
-        this(buffer.readList(b -> lookup.apply(b.readIdentifier())), buffer.readOptional(FoodAttributes::read), new Ailment(buffer));
+        return PacketCodec.tuple(
+                keyCodec.collect(PacketCodecs.toList()), FoodGroupEffects::tags,
+                PacketCodecs.optional(FoodComponent.PACKET_CODEC), FoodGroupEffects::foodComponent,
+                Ailment.PACKET_CODEC, FoodGroupEffects::ailment,
+                FoodGroupEffects::new
+        );
     }
 
     @Override
-    public void appendTooltip(ItemStack stack, List<Text> tooltip, TooltipContext context) {
+    public void appendTooltip(ItemStack stack, List<Text> tooltip, TooltipType context) {
         tags.forEach(tag -> {
             if (tag.contains(stack)) {
                 tooltip.add(Text.literal(" ").append(Text.translatable(Util.createTranslationKey("tag", tag.id()))).formatted(Formatting.GRAY));
@@ -49,7 +57,7 @@ public record FoodGroupEffects(
     public static final class Builder {
         private final List<FoodGroupKey> tags = new ArrayList<>();
         private Optional<FoodComponent> foodComponent = Optional.empty();
-        private Ailment ailment = new Ailment(Affliction.EMPTY);
+        private Ailment ailment = Ailment.EMPTY;
 
         public Builder tag(Identifier tag) {
             return tag(TagKey.of(RegistryKeys.ITEM, tag));

src/main/java/com/minelittlepony/unicopia/diet/FoodGroupKey.java

@@ -6,8 +6,10 @@ import com.minelittlepony.unicopia.Debug;
 import com.minelittlepony.unicopia.Unicopia;
 import com.mojang.serialization.Codec;
 
+import io.netty.buffer.ByteBuf;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.network.codec.PacketCodec;
 import net.minecraft.registry.Registries;
 import net.minecraft.registry.RegistryKeys;
 import net.minecraft.registry.tag.TagKey;
@@ -71,9 +73,13 @@ public interface FoodGroupKey {
         };
     });
     Function<Identifier, FoodGroupKey> TAG_ID_LOOKUP = id -> TAG_LOOKUP.apply(TagKey.of(RegistryKeys.ITEM, id));
+
     Codec<FoodGroupKey> CODEC = Identifier.CODEC.xmap(LOOKUP, FoodGroupKey::id);
     Codec<FoodGroupKey> TAG_CODEC = TagKey.unprefixedCodec(RegistryKeys.ITEM).xmap(TAG_LOOKUP, k -> TagKey.of(RegistryKeys.ITEM, k.id()));
 
+    PacketCodec<ByteBuf, FoodGroupKey> PACKET_CODEC = Identifier.PACKET_CODEC.xmap(LOOKUP, FoodGroupKey::id);
+    PacketCodec<ByteBuf, FoodGroupKey> TAG_PACKET_CODEC = Identifier.PACKET_CODEC.xmap(id -> TAG_LOOKUP.apply(TagKey.of(RegistryKeys.ITEM, id)), FoodGroupKey::id);
+
     Identifier id();
 
     boolean contains(ItemStack stack);

src/main/java/com/minelittlepony/unicopia/diet/PonyDiets.java

@@ -1,23 +1,25 @@
 package com.minelittlepony.unicopia.diet;
 
-import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Optional;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-
 import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.entity.effect.FoodPoisoningStatusEffect;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.item.ItemDuck;
-import net.minecraft.client.item.TooltipContext;
+import com.minelittlepony.unicopia.util.serialization.PacketCodecUtils;
+
+import net.minecraft.component.DataComponentTypes;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.item.tooltip.TooltipType;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
 import net.minecraft.util.Hand;
@@ -27,11 +29,28 @@ import net.minecraft.world.World;
 
 public class PonyDiets implements DietView {
     private final Map<Race, DietProfile> diets;
-    private final Map<Identifier, Effect> effects;
+    private final Map<Identifier, FoodGroup> effects;
 
     private static PonyDiets INSTANCE = new PonyDiets(Map.of(), Map.of());
 
+    public static final PacketCodec<RegistryByteBuf, PonyDiets> PACKET_CODEC = PacketCodec.tuple(
+            PacketCodecs.map(HashMap::new, PacketCodecs.registryValue(Race.REGISTRY_KEY), DietProfile.PACKET_CODEC), diets -> diets.diets,
+            FoodGroup.PACKET_CODEC.collect(PacketCodecUtils.toMap(FoodGroup::id)), diets -> diets.effects,
+            PonyDiets::new
+    );
+
+    /*public static final PacketCodec<RegistryByteBuf, PonyDiets> PACKET_CODEC = PacketCodec.ofStatic((buffer, diets) -> {
+        buffer.writeMap(diets.diets, (b, r) -> b.writeRegistryKey(Race.REGISTRY.getKey(r).get()), (b, e) -> e.toBuffer(b));
+        buffer.writeCollection(diets.effects.values(), (b, e) -> e.toBuffer(b));
+    }, buffer -> {
+        return new PonyDiets(
+                buffer.readMap(b -> Race.REGISTRY.get(b.readRegistryKey(Race.REGISTRY_KEY)), DietProfile::new),
+                FoodGroup.PACKET_CODEC.collect(PacketCodecUtils.toMap(FoodGroup::id)).decode(buffer)
+        );
+    });*/
+
     public static PonyDiets getInstance() {
+
         return INSTANCE;
     }
 
@@ -44,29 +63,17 @@ public class PonyDiets implements DietView {
         INSTANCE = diets;
     }
 
-    PonyDiets(Map<Race, DietProfile> diets, Map<Identifier, Effect> effects) {
+    PonyDiets(Map<Race, DietProfile> diets, Map<Identifier, FoodGroup> effects) {
         this.diets = diets;
         this.effects = effects;
     }
 
-    public PonyDiets(PacketByteBuf buffer) {
-        this(
-                buffer.readMap(b -> b.readRegistryValue(Race.REGISTRY), DietProfile::new),
-                buffer.readCollection(ArrayList::new, FoodGroup::new).stream().collect(Collectors.toMap(FoodGroup::id, Function.identity()))
-        );
-    }
-
-    public void toBuffer(PacketByteBuf buffer) {
-        buffer.writeMap(diets, (b, r) -> b.writeRegistryValue(Race.REGISTRY, r), (b, e) -> e.toBuffer(b));
-        buffer.writeCollection(effects.values(), (b, e) -> e.toBuffer(b));
-    }
-
     private DietProfile getDiet(Pony pony) {
         return Optional.ofNullable(diets.get(pony.getObservedSpecies())).orElse(DietProfile.EMPTY);
     }
 
     Effect getEffects(ItemStack stack) {
-        return effects.values().stream().filter(effect -> effect.test(stack)).findFirst().orElse(Effect.EMPTY);
+        return effects.values().stream().filter(effect -> effect.test(stack)).findFirst().map(Effect.class::cast).orElse(Effect.EMPTY);
     }
 
     private Effect getEffects(ItemStack stack, Pony pony) {
@@ -88,10 +95,10 @@ public class PonyDiets implements DietView {
     }
 
     @Override
-    public void appendTooltip(ItemStack stack, @Nullable PlayerEntity user, List<Text> tooltip, TooltipContext context) {
+    public void appendTooltip(ItemStack stack, @Nullable PlayerEntity user, List<Text> tooltip, TooltipType context) {
 
         if (initEdibility(stack, user)) {
-            if (!((ItemDuck)stack.getItem()).getOriginalFoodComponent().isEmpty() || stack.getItem().getFoodComponent() != null) {
+            if (!((ItemDuck)stack.getItem()).getOriginalFoodComponent().isEmpty() || stack.contains(DataComponentTypes.FOOD)) {
                 Pony pony = Pony.of(user);
 
                 tooltip.add(Text.translatable("unicopia.diet.information").formatted(Formatting.DARK_PURPLE));
@@ -107,14 +114,14 @@ public class PonyDiets implements DietView {
         return Pony.of(user).filter(pony -> {
             DietProfile diet = getDiet(pony);
 
-            if (!stack.isFood() && pony.getObservedSpecies().hasIronGut()) {
+            if (!stack.contains(DataComponentTypes.FOOD) && pony.getObservedSpecies().hasIronGut()) {
                 diet.findEffect(stack)
                     .flatMap(Effect::foodComponent)
                     .or(() -> getEffects(stack).foodComponent())
                     .ifPresent(item::setFoodComponent);
             }
 
-            if (stack.isFood()) {
+            if (stack.contains(DataComponentTypes.FOOD)) {
                 item.setFoodComponent(diet.getAdjustedFoodComponent(stack));
             }
 

src/main/java/com/minelittlepony/unicopia/diet/affliction/Affliction.java

@@ -7,38 +7,28 @@ import com.mojang.serialization.Codec;
 
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
-import net.minecraft.util.dynamic.Codecs;
 
 public interface Affliction {
-    Affliction EMPTY = new Affliction() {
+    Codec<Affliction> SINGLE_CODEC = AfflictionType.CODEC.dispatch("type", affliction -> affliction.getType(), type -> type.codec());
-        @Override
+    Codec<Affliction> CODEC = Codec.xor(SINGLE_CODEC, Codec.list(SINGLE_CODEC).xmap(
-        public void afflict(PlayerEntity player, ItemStack stack) { }
-
-        @Override
-        public AfflictionType<?> getType() {
-            return AfflictionType.EMPTY;
-        }
-
-        @Override
-        public void toBuffer(PacketByteBuf buffer) { }
-    };
-    Codec<Affliction> CODEC = Codecs.xor(AfflictionType.CODEC, Codec.list(AfflictionType.CODEC).xmap(
             afflictions -> {
                 afflictions = afflictions.stream().filter(f -> !f.isEmpty()).toList();
                 return switch (afflictions.size()) {
-                    case 0 -> EMPTY;
+                    case 0 -> EmptyAffliction.INSTANCE;
                     case 1 -> afflictions.get(0);
                     default -> new CompoundAffliction(afflictions);
                 };
             },
-            affliction -> ((CompoundAffliction)affliction).afflictions
+            affliction -> ((CompoundAffliction)affliction).afflictions()
     )).xmap(
             either -> either.left().or(either::right).get(),
             affliction -> affliction instanceof CompoundAffliction ? Either.right(affliction) : Either.left(affliction)
     );
+    PacketCodec<RegistryByteBuf, Affliction> PACKET_CODEC = AfflictionType.PACKET_CODEC.dispatch(Affliction::getType, AfflictionType::packetCodec);
 
     void afflict(PlayerEntity player, ItemStack stack);
 
@@ -55,15 +45,4 @@ public interface Affliction {
     }
 
     AfflictionType<?> getType();
-
-    void toBuffer(PacketByteBuf buffer);
-
-    static void write(PacketByteBuf buffer, Affliction affliction) {
-        buffer.writeIdentifier(affliction.getType().id());
-        affliction.toBuffer(buffer);
-    }
-
-    static Affliction read(PacketByteBuf buffer) {
-        return AfflictionType.REGISTRY.get(buffer.readIdentifier()).reader().apply(buffer);
-    }
 }

src/main/java/com/minelittlepony/unicopia/diet/affliction/AfflictionType.java

@@ -3,45 +3,30 @@ package com.minelittlepony.unicopia.diet.affliction;
 import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.util.RegistryUtils;
 import com.mojang.serialization.Codec;
-import com.mojang.serialization.DataResult;
+import com.mojang.serialization.MapCodec;
-import com.mojang.serialization.JsonOps;
 
-import net.minecraft.network.PacketByteBuf.PacketReader;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.registry.Registry;
 import net.minecraft.util.Identifier;
-import net.minecraft.util.JsonHelper;
 import net.minecraft.util.Util;
-import net.minecraft.util.dynamic.Codecs;
 
-public record AfflictionType<T extends Affliction>(Codec<T> codec, Identifier id, PacketReader<T> reader) {
+public record AfflictionType<T extends Affliction>(Identifier id, MapCodec<T> codec, PacketCodec<? super RegistryByteBuf, T> packetCodec) {
     public static final String DEFAULT_ID = "unicopia:apply_status_effect";
     public static final Registry<AfflictionType<?>> REGISTRY = RegistryUtils.createDefaulted(Unicopia.id("affliction_type"), DEFAULT_ID);
-    @SuppressWarnings("unchecked")
+    public static final Codec<AfflictionType<?>> CODEC = REGISTRY.getCodec();
-    public static final Codec<Affliction> CODEC = Codecs.JSON_ELEMENT.<Affliction>flatXmap(json -> {
+    public static final PacketCodec<RegistryByteBuf, AfflictionType<?>> PACKET_CODEC = PacketCodecs.registryValue(REGISTRY.getKey());
-        if (!json.isJsonObject()) {
-            return DataResult.error(() -> "Not a JSON object");
-        }
-        return Identifier.validate(JsonHelper.getString(JsonHelper.asObject(json, "affliction"), "type", AfflictionType.DEFAULT_ID))
-                .flatMap(type -> AfflictionType.REGISTRY.get(type).codec().parse(JsonOps.INSTANCE, json));
-    }, thing -> {
-        AfflictionType<?> type = thing.getType();
-        return ((Codec<Affliction>)type.codec()).encodeStart(JsonOps.INSTANCE, thing).map(json -> {
-            if (json.isJsonObject()) {
-                json.getAsJsonObject().addProperty("type", type.id().toString());
-            }
-            return json;
-        });
-    });
 
-    public static final AfflictionType<Affliction> EMPTY = register("empty", Codec.unit(Affliction.EMPTY), buffer -> Affliction.EMPTY);
+    public static final AfflictionType<EmptyAffliction> EMPTY = register("empty", EmptyAffliction.CODEC, EmptyAffliction.PACKET_CODEC);
-    public static final AfflictionType<Affliction> MANY = register("many", CompoundAffliction.CODEC, CompoundAffliction::new);
+    public static final AfflictionType<CompoundAffliction> MANY = register("many", CompoundAffliction.CODEC, CompoundAffliction.PACKET_CODEC);
-    public static final AfflictionType<StatusEffectAffliction> APPLY_STATUS_EFFECT = register("apply_status_effect", StatusEffectAffliction.CODEC, StatusEffectAffliction::new);
+    public static final AfflictionType<StatusEffectAffliction> APPLY_STATUS_EFFECT = register("apply_status_effect", StatusEffectAffliction.CODEC, StatusEffectAffliction.PACKET_CODEC);
-    public static final AfflictionType<LoseHungerAffliction> LOSE_HUNGER = register("lose_hunger", LoseHungerAffliction.CODEC, LoseHungerAffliction::new);
+    public static final AfflictionType<LoseHungerAffliction> LOSE_HUNGER = register("lose_hunger", LoseHungerAffliction.CODEC, LoseHungerAffliction.PACKET_CODEC);
-    public static final AfflictionType<HealingAffliction> HEALING = register("healing", HealingAffliction.CODEC, HealingAffliction::new);
+    public static final AfflictionType<HealingAffliction> HEALING = register("healing", HealingAffliction.CODEC, HealingAffliction.PACKET_CODEC);
-    public static final AfflictionType<ClearLoveSicknessAffliction> CURE_LOVE_SICKNESS = register("cure_love_sickness", ClearLoveSicknessAffliction.CODEC, buffer -> ClearLoveSicknessAffliction.INSTANCE);
+    public static final AfflictionType<ClearLoveSicknessAffliction> CURE_LOVE_SICKNESS = register("cure_love_sickness", ClearLoveSicknessAffliction.CODEC, ClearLoveSicknessAffliction.PACKET_CODEC);
 
-    static <T extends Affliction> AfflictionType<T> register(String name, Codec<T> codec, PacketReader<T> reader) {
+    static <T extends Affliction> AfflictionType<T> register(String name, MapCodec<T> codec, PacketCodec<? super RegistryByteBuf, T> packetCodec) {
-        return Registry.register(REGISTRY, Unicopia.id(name), new AfflictionType<>(codec, Unicopia.id(name), reader));
+        return Registry.register(REGISTRY, Unicopia.id(name), new AfflictionType<>(Unicopia.id(name), codec, packetCodec));
     }
 
     public String getTranslationKey() {

src/main/java/com/minelittlepony/unicopia/diet/affliction/ClearLoveSicknessAffliction.java

@@ -1,15 +1,22 @@
 package com.minelittlepony.unicopia.diet.affliction;
 
+import org.jetbrains.annotations.Nullable;
+
 import com.minelittlepony.unicopia.entity.effect.UEffects;
-import com.mojang.serialization.Codec;
+import com.mojang.serialization.MapCodec;
+
+import io.netty.buffer.ByteBuf;
+import net.minecraft.component.DataComponentTypes;
+import net.minecraft.component.type.FoodComponent;
 import net.minecraft.entity.effect.StatusEffects;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.codec.PacketCodec;
 
 public final class ClearLoveSicknessAffliction implements Affliction {
     public static final ClearLoveSicknessAffliction INSTANCE = new ClearLoveSicknessAffliction();
-    public static final Codec<ClearLoveSicknessAffliction> CODEC = Codec.unit(INSTANCE);
+    public static final MapCodec<ClearLoveSicknessAffliction> CODEC = MapCodec.unit(INSTANCE);
+    public static final PacketCodec<ByteBuf, ClearLoveSicknessAffliction> PACKET_CODEC = PacketCodec.unit(INSTANCE);
 
     @Override
     public AfflictionType<?> getType() {
@@ -18,7 +25,9 @@ public final class ClearLoveSicknessAffliction implements Affliction {
 
     @Override
     public void afflict(PlayerEntity player, ItemStack stack) {
-        player.heal(stack.isFood() ? stack.getItem().getFoodComponent().getHunger() : 1);
+        @Nullable
+        FoodComponent food = stack.get(DataComponentTypes.FOOD);
+        player.heal(food == null ? 1 : food.nutrition());
         if (player.getWorld().isClient) {
             return;
         }
@@ -26,8 +35,4 @@ public final class ClearLoveSicknessAffliction implements Affliction {
         player.removeStatusEffect(UEffects.FOOD_POISONING);
         player.removeStatusEffect(StatusEffects.WEAKNESS);
     }
-
-    @Override
-    public void toBuffer(PacketByteBuf buffer) {
-    }
 }

src/main/java/com/minelittlepony/unicopia/diet/affliction/CompoundAffliction.java

@@ -2,31 +2,25 @@ package com.minelittlepony.unicopia.diet.affliction;
 
 import java.util.List;
 
+import com.mojang.serialization.MapCodec;
+import com.mojang.serialization.codecs.RecordCodecBuilder;
+
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
 import net.minecraft.text.Text;
 
-public class CompoundAffliction implements Affliction {
+public record CompoundAffliction (List<Affliction> afflictions) implements Affliction {
-    public final List<Affliction> afflictions;
+    public static final MapCodec<CompoundAffliction> CODEC = RecordCodecBuilder.mapCodec(instance -> instance.group(
-
+            Affliction.CODEC.listOf().fieldOf("afflictions").forGetter(CompoundAffliction::afflictions)
-    public CompoundAffliction(List<Affliction> afflictions) {
+    ).apply(instance, CompoundAffliction::new));
-        this.afflictions = afflictions;
+    public static final PacketCodec<RegistryByteBuf, CompoundAffliction> PACKET_CODEC = null;
-    }
 
     public static CompoundAffliction of(Affliction...afflictions) {
         return new CompoundAffliction(List.of(afflictions));
     }
 
-    public CompoundAffliction(PacketByteBuf buffer) {
-        this(buffer.readList(Affliction::read));
-    }
-
-    @Override
-    public void toBuffer(PacketByteBuf buffer) {
-        buffer.writeCollection(afflictions, Affliction::write);
-    }
-
     @Override
     public AfflictionType<?> getType() {
         return AfflictionType.MANY;
@@ -49,7 +43,6 @@ public class CompoundAffliction implements Affliction {
         });
     }
 
-
     @Override
     public void afflict(PlayerEntity player, ItemStack stack) {
         afflictions.forEach(i -> i.afflict(player, stack));

src/main/java/com/minelittlepony/unicopia/diet/affliction/EmptyAffliction.java

@@ -0,0 +1,23 @@
+package com.minelittlepony.unicopia.diet.affliction;
+
+import com.mojang.serialization.MapCodec;
+
+import io.netty.buffer.ByteBuf;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.ItemStack;
+import net.minecraft.network.codec.PacketCodec;
+
+public record EmptyAffliction() implements Affliction {
+    public static final EmptyAffliction INSTANCE = new EmptyAffliction();
+    public static final MapCodec<EmptyAffliction> CODEC = MapCodec.unit(INSTANCE);
+    public static final PacketCodec<ByteBuf, EmptyAffliction> PACKET_CODEC = PacketCodec.unit(INSTANCE);
+
+    @Override
+    public void afflict(PlayerEntity player, ItemStack stack) {
+    }
+
+    @Override
+    public AfflictionType<?> getType() {
+        return AfflictionType.EMPTY;
+    }
+}

src/main/java/com/minelittlepony/unicopia/diet/affliction/HealingAffliction.java

@@ -1,26 +1,21 @@
 package com.minelittlepony.unicopia.diet.affliction;
 
 import com.mojang.serialization.Codec;
+import com.mojang.serialization.MapCodec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
+import io.netty.buffer.ByteBuf;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.text.Text;
 
 public record HealingAffliction(float health) implements Affliction {
-    public static final Codec<HealingAffliction> CODEC = RecordCodecBuilder.create(instance -> instance.group(
+    public static final MapCodec<HealingAffliction> CODEC = RecordCodecBuilder.mapCodec(instance -> instance.group(
             Codec.FLOAT.fieldOf("health").forGetter(HealingAffliction::health)
     ).apply(instance, HealingAffliction::new));
-
+    public static final PacketCodec<ByteBuf, HealingAffliction> PACKET_CODEC = PacketCodecs.FLOAT.xmap(HealingAffliction::new, HealingAffliction::health);
-    public HealingAffliction(PacketByteBuf buffer) {
-        this(buffer.readFloat());
-    }
-
-    @Override
-    public void toBuffer(PacketByteBuf buffer) {
-        buffer.writeFloat(health);
-    }
 
     @Override
     public AfflictionType<?> getType() {

src/main/java/com/minelittlepony/unicopia/diet/affliction/LoseHungerAffliction.java

@@ -1,26 +1,21 @@
 package com.minelittlepony.unicopia.diet.affliction;
 
 import com.mojang.serialization.Codec;
+import com.mojang.serialization.MapCodec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
+import io.netty.buffer.ByteBuf;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.text.Text;
 
 public record LoseHungerAffliction(float multiplier) implements Affliction {
-    public static final Codec<LoseHungerAffliction> CODEC = RecordCodecBuilder.create(instance -> instance.group(
+    public static final MapCodec<LoseHungerAffliction> CODEC = RecordCodecBuilder.mapCodec(instance -> instance.group(
             Codec.FLOAT.fieldOf("multiplier").forGetter(LoseHungerAffliction::multiplier)
     ).apply(instance, LoseHungerAffliction::new));
-
+    public static final PacketCodec<ByteBuf, LoseHungerAffliction> PACKET_CODEC = PacketCodecs.FLOAT.xmap(LoseHungerAffliction::new, LoseHungerAffliction::multiplier);
-    public LoseHungerAffliction(PacketByteBuf buffer) {
-        this(buffer.readFloat());
-    }
-
-    @Override
-    public void toBuffer(PacketByteBuf buffer) {
-        buffer.writeFloat(multiplier);
-    }
 
     @Override
     public AfflictionType<?> getType() {

src/main/java/com/minelittlepony/unicopia/diet/affliction/Range.java

@@ -1,38 +1,38 @@
 package com.minelittlepony.unicopia.diet.affliction;
 
+import com.google.common.collect.Interner;
+import com.google.common.collect.Interners;
 import com.mojang.datafixers.util.Either;
 import com.mojang.serialization.Codec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
 import net.minecraft.network.PacketByteBuf;
-import net.minecraft.util.dynamic.Codecs;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 
 public record Range(int min, int max) {
-    public static final Codec<Range> CODEC = Codecs.xor(
+    private static final Interner<Range> INTERNER = Interners.newWeakInterner();
+    public static final Codec<Range> CODEC = Codec.xor(
             Codec.INT.xmap(value -> Range.of(value, -1), range -> range.min()),
             RecordCodecBuilder.<Range>create(instance -> instance.group(
                 Codec.INT.fieldOf("min").forGetter(Range::min),
                 Codec.INT.fieldOf("max").forGetter(Range::max)
             ).apply(instance, Range::of))
     ).xmap(either -> either.left().or(either::right).get(), l -> Either.right(l));
+    public static final PacketCodec<PacketByteBuf, Range> PACKET_CODEC = PacketCodec.tuple(
+            PacketCodecs.INTEGER, Range::min,
+            PacketCodecs.INTEGER, Range::max,
+            Range::of
+    );
 
     public static Range of(int min, int max) {
-        return new Range(min, max);
+        return INTERNER.intern(new Range(min, max));
     }
 
     public static Range of(int exact) {
         return of(exact, exact);
     }
 
-    public static Range of(PacketByteBuf buffer) {
-        return of(buffer.readInt(), buffer.readInt());
-    }
-
-    public void toBuffer(PacketByteBuf buffer) {
-        buffer.writeInt(min);
-        buffer.writeInt(max);
-    }
-
     public int getClamped(int currentTicks, int multiplier) {
         return clamp((min * multiplier) + currentTicks, multiplier);
     }

src/main/java/com/minelittlepony/unicopia/diet/affliction/StatusEffectAffliction.java

@@ -1,40 +1,39 @@
 package com.minelittlepony.unicopia.diet.affliction;
 
 import com.mojang.serialization.Codec;
+import com.mojang.serialization.MapCodec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
 import net.minecraft.client.MinecraftClient;
-import net.minecraft.entity.attribute.EntityAttributes;
 import net.minecraft.entity.effect.StatusEffect;
 import net.minecraft.entity.effect.StatusEffectInstance;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
-import net.minecraft.network.PacketByteBuf;
+import net.minecraft.network.RegistryByteBuf;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.registry.Registries;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.text.MutableText;
 import net.minecraft.text.Text;
 import net.minecraft.util.StringHelper;
 import net.minecraft.util.math.MathHelper;
 
-public record StatusEffectAffliction(StatusEffect effect, Range seconds, Range amplifier, int chance) implements Affliction {
+public record StatusEffectAffliction(RegistryEntry<StatusEffect> effect, Range seconds, Range amplifier, int chance) implements Affliction {
-    public static final Codec<StatusEffectAffliction> CODEC = RecordCodecBuilder.create(instance -> instance.group(
+    public static final MapCodec<StatusEffectAffliction> CODEC = RecordCodecBuilder.mapCodec(instance -> instance.group(
-            Registries.STATUS_EFFECT.getCodec().fieldOf("effect").forGetter(StatusEffectAffliction::effect),
+            Registries.STATUS_EFFECT.getEntryCodec().fieldOf("effect").forGetter(StatusEffectAffliction::effect),
             Range.CODEC.fieldOf("seconds").forGetter(StatusEffectAffliction::seconds),
             Range.CODEC.optionalFieldOf("amplifier", Range.of(0, -1)).forGetter(StatusEffectAffliction::amplifier),
             Codec.INT.optionalFieldOf("chance", 0).forGetter(StatusEffectAffliction::chance)
     ).apply(instance, StatusEffectAffliction::new));
-
+    public static final PacketCodec<RegistryByteBuf, StatusEffectAffliction> PACKET_CODEC = PacketCodec.tuple(
-    public StatusEffectAffliction(PacketByteBuf buffer) {
+            PacketCodecs.registryEntry(RegistryKeys.STATUS_EFFECT), StatusEffectAffliction::effect,
-        this(Registries.STATUS_EFFECT.get(buffer.readIdentifier()), Range.of(buffer), Range.of(buffer), buffer.readInt());
+            Range.PACKET_CODEC, StatusEffectAffliction::seconds,
-    }
+            Range.PACKET_CODEC, StatusEffectAffliction::amplifier,
-
+            PacketCodecs.INTEGER, StatusEffectAffliction::chance,
-    @Override
+            StatusEffectAffliction::new
-    public void toBuffer(PacketByteBuf buffer) {
+    );
-        buffer.writeIdentifier(Registries.STATUS_EFFECT.getId(effect));
-        seconds.toBuffer(buffer);
-        amplifier.toBuffer(buffer);
-        buffer.writeInt(chance);
-    }
 
     @Override
     public AfflictionType<?> getType() {
@@ -43,27 +42,26 @@ public record StatusEffectAffliction(StatusEffect effect, Range seconds, Range a
 
     @Override
     public void afflict(PlayerEntity player, ItemStack stack) {
-        if (player.getWorld().isClient) {
+        if (player.getWorld().isClient || (chance > 0 && player.getWorld().random.nextInt(chance) > 0)) {
-            return;
-        }
-        if (chance > 0 && player.getWorld().random.nextInt(chance) > 0) {
             return;
         }
+
         float health = player.getHealth();
+        float oldMaxHealth = player.getMaxHealth();
         StatusEffectInstance current = player.getStatusEffect(effect);
         player.addStatusEffect(new StatusEffectInstance(effect,
                 seconds.getClamped(current == null ? 0 : current.getDuration(), 20),
                 amplifier.getClamped(current == null ? 0 : current.getAmplifier(), 1)
         ));
         // keep original health
-        if (effect.getAttributeModifiers().containsKey(EntityAttributes.GENERIC_MAX_HEALTH)) {
+        if (player.getMaxHealth() != oldMaxHealth) {
             player.setHealth(MathHelper.clamp(health, 0, player.getMaxHealth()));
         }
     }
 
     @Override
     public Text getName() {
-        MutableText text = effect.getName().copy();
+        MutableText text = effect.value().getName().copy();
 
         if (amplifier.min() > 0) {
             text = Text.translatable("potion.withAmplifier", text, Text.translatable("potion.potency." + (amplifier.min())));

src/main/java/com/minelittlepony/unicopia/entity/AttributeContainer.java

@@ -1,21 +1,21 @@
 package com.minelittlepony.unicopia.entity;
 
 import java.util.Map;
-import java.util.UUID;
-
 import org.jetbrains.annotations.Nullable;
 
 import it.unimi.dsi.fastutil.floats.Float2ObjectFunction;
 import net.minecraft.entity.attribute.EntityAttribute;
 import net.minecraft.entity.attribute.EntityAttributeInstance;
 import net.minecraft.entity.attribute.EntityAttributeModifier;
+import net.minecraft.registry.entry.RegistryEntry;
+import net.minecraft.util.Identifier;
 import net.minecraft.util.math.MathHelper;
 
 public interface AttributeContainer {
     @Nullable
-    EntityAttributeInstance getAttributeInstance(EntityAttribute attribute);
+    EntityAttributeInstance getAttributeInstance(RegistryEntry<EntityAttribute> attribute);
 
-    default void updateAttributeModifier(UUID id, EntityAttribute attribute, float desiredValue, Float2ObjectFunction<EntityAttributeModifier> modifierSupplier, boolean permanent) {
+    default void updateAttributeModifier(Identifier id, RegistryEntry<EntityAttribute> attribute, float desiredValue, Float2ObjectFunction<EntityAttributeModifier> modifierSupplier, boolean permanent) {
         @Nullable
         EntityAttributeInstance instance = getAttributeInstance(attribute);
         if (instance == null) {
@@ -25,7 +25,7 @@ public interface AttributeContainer {
         @Nullable
         EntityAttributeModifier modifier = instance.getModifier(id);
 
-        if (!MathHelper.approximatelyEquals(desiredValue, modifier == null ? 0 : modifier.getValue())) {
+        if (!MathHelper.approximatelyEquals(desiredValue, modifier == null ? 0 : modifier.value())) {
             instance.removeModifier(id);
 
             if (desiredValue != 0) {
@@ -38,13 +38,13 @@ public interface AttributeContainer {
         }
     }
 
-    default void applyAttributeModifiers(Map<EntityAttribute, EntityAttributeModifier> modifiers, boolean permanent, boolean apply) {
+    default void applyAttributeModifiers(Map<RegistryEntry<EntityAttribute>, EntityAttributeModifier> modifiers, boolean permanent, boolean apply) {
         modifiers.forEach((attribute, modifier) -> {
             applyAttributeModifier(attribute, modifier, permanent, apply);
         });
     }
 
-    default void applyAttributeModifier(EntityAttribute attribute, EntityAttributeModifier modifier, boolean permanent, boolean apply) {
+    default void applyAttributeModifier(RegistryEntry<EntityAttribute> attribute, EntityAttributeModifier modifier, boolean permanent, boolean apply) {
         @Nullable
         EntityAttributeInstance instance = getAttributeInstance(attribute);
         if (instance == null) {
@@ -52,7 +52,7 @@ public interface AttributeContainer {
         }
 
         @Nullable
-        boolean present = instance.hasModifier(modifier);
+        boolean present = instance.hasModifier(modifier.id());
 
         if (present != apply) {
             if (apply) {
@@ -62,7 +62,7 @@ public interface AttributeContainer {
                     instance.addTemporaryModifier(modifier);
                 }
             } else {
-                instance.removeModifier(modifier.getId());
+                instance.removeModifier(modifier.id());
             }
         }
     }

src/main/java/com/minelittlepony/unicopia/entity/Creature.java

@@ -34,6 +34,7 @@ import net.minecraft.entity.passive.*;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.nbt.NbtElement;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.util.math.MathHelper;
 
 public class Creature extends Living<LivingEntity> implements WeaklyOwned.Mutable<LivingEntity> {
@@ -299,23 +300,23 @@ public class Creature extends Living<LivingEntity> implements WeaklyOwned.Mutabl
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.toNBT(compound);
+        super.toNBT(compound, lookup);
-        compound.put("master", getMasterReference().toNBT());
+        compound.put("master", getMasterReference().toNBT(lookup));
-        physics.toNBT(compound);
+        physics.toNBT(compound, lookup);
         compound.putBoolean("discorded", isDiscorded());
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.fromNBT(compound);
+        super.fromNBT(compound, lookup);
         if (compound.contains("master", NbtElement.COMPOUND_TYPE)) {
-            owner.fromNBT(compound.getCompound("master"));
+            getMasterReference().fromNBT(compound.getCompound("master"), lookup);
-            if (owner.isSet()) {
+            if (getMasterReference().isSet()) {
                 targets.ifPresent(this::initMinionAi);
             }
         }
-        physics.fromNBT(compound);
+        physics.fromNBT(compound, lookup);
         setDiscorded(compound.getBoolean("discorded"));
     }
 

src/main/java/com/minelittlepony/unicopia/entity/Enchantments.java

@@ -17,36 +17,41 @@ import com.minelittlepony.unicopia.util.Tickable;
 import net.minecraft.enchantment.Enchantment;
 import net.minecraft.enchantment.EnchantmentHelper;
 import net.minecraft.nbt.NbtCompound;
+import net.minecraft.nbt.NbtElement;
 import net.minecraft.nbt.NbtList;
 import net.minecraft.nbt.NbtString;
 import net.minecraft.util.Identifier;
 import net.minecraft.registry.Registries;
+import net.minecraft.registry.RegistryKey;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
+import net.minecraft.registry.entry.RegistryEntry;
 
 public class Enchantments implements NbtSerialisable, Tickable {
 
     private final Living<?> entity;
 
-    private final Set<Enchantment> equippedEnchantments = new HashSet<>();
+    private final Set<RegistryEntry<Enchantment>> equippedEnchantments = new HashSet<>();
 
-    private final Map<Enchantment, SimpleEnchantment.Data> data = new HashMap<>();
+    private final Map<RegistryEntry<Enchantment>, SimpleEnchantment.Data> data = new HashMap<>();
 
     Enchantments(Living<?> entity) {
         this.entity = entity;
     }
 
     @SuppressWarnings("unchecked")
-    public <T extends SimpleEnchantment.Data> Optional<T> getOrEmpty(Enchantment enchantment) {
+    public <T extends SimpleEnchantment.Data> Optional<T> getOrEmpty(RegistryEntry<Enchantment> enchantment) {
         return Optional.ofNullable((T)data.get(enchantment));
     }
 
     @SuppressWarnings("unchecked")
-    public <T extends SimpleEnchantment.Data> T computeIfAbsent(Enchantment enchantment, Supplier<T> factory) {
+    public <T extends SimpleEnchantment.Data> T computeIfAbsent(RegistryEntry<Enchantment> enchantment, Supplier<T> factory) {
         return (T)data.computeIfAbsent(enchantment, e -> factory.get());
     }
 
     @Nullable
     @SuppressWarnings("unchecked")
-    public <T extends SimpleEnchantment.Data> T remove(Enchantment enchantment) {
+    public <T extends SimpleEnchantment.Data> T remove(RegistryEntry<Enchantment> enchantment) {
         return (T)data.remove(enchantment);
     }
 
@@ -60,37 +65,38 @@ public class Enchantments implements NbtSerialisable, Tickable {
             if (active != equippedEnchantments.contains(ench)) {
                 if (active) {
                     equippedEnchantments.add(ench);
-                    ench.onEquipped(entity);
+                    ench.value().onEquipped(entity);
                 } else {
                     equippedEnchantments.remove(ench);
-                    ench.onUnequipped(entity);
+                    ench.value().onUnequipped(entity);
                 }
             }
 
             if (active) {
-                ench.onUserTick(entity, level);
+                ench.value().onUserTick(entity, level);
             }
         });
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
         NbtList list = new NbtList();
         equippedEnchantments.forEach(enchant -> {
-            Identifier id = Registries.ENCHANTMENT.getId(enchant);
+            enchant.getKey().ifPresent(key -> {
-            if (id != null) {
+                list.add(NbtString.of(key.getValue().toString()));
-                list.add(NbtString.of(id.toString()));
+            });
-            }
         });
         compound.put("enchants", list);
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
         equippedEnchantments.clear();
         if (compound.contains("enchants")) {
-            compound.getList("enchants", 8).forEach(tag -> {
+            compound.getList("enchants", NbtElement.STRING_TYPE).forEach(tag -> {
-                Registries.ENCHANTMENT.getOrEmpty(new Identifier(tag.asString())).ifPresent(equippedEnchantments::add);
+                lookup.getWrapperOrThrow(RegistryKeys.ENCHANTMENT)
+                    .getOptional(RegistryKey.of(RegistryKeys.ENCHANTMENT, Identifier.of(tag.asString())))
+                    .ifPresent(equippedEnchantments::add);
             });
         }
     }

src/main/java/com/minelittlepony/unicopia/entity/EntityPhysics.java

@@ -14,6 +14,7 @@ import net.minecraft.entity.EntityPose;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.mob.MobEntity;
 import net.minecraft.nbt.NbtCompound;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.registry.tag.BlockTags;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.Vec3d;
@@ -130,12 +131,12 @@ public class EntityPhysics<T extends Entity> implements Physics, Copyable<Entity
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
         compound.putFloat("gravity", getBaseGravityModifier());
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
         setBaseGravityModifier(compound.getFloat("gravity"));
     }
 

src/main/java/com/minelittlepony/unicopia/entity/ItemImpl.java

@@ -23,6 +23,7 @@ import net.minecraft.nbt.NbtCompound;
 import net.minecraft.nbt.NbtElement;
 import net.minecraft.particle.ParticleEffect;
 import net.minecraft.particle.ParticleTypes;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.util.ActionResult;
 import net.minecraft.util.math.Vec3d;
 import net.minecraft.util.math.random.Random;
@@ -154,13 +155,13 @@ public class ItemImpl implements Equine<ItemEntity> {
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
         compound.putString("owner_race", getSpecies().getId().toString());
         physics.toNBT(compound);
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
         if (compound.contains("owner_race", NbtElement.STRING_TYPE)) {
             setSpecies(Race.fromName(compound.getString("owner_race"), Race.HUMAN));
         }
@@ -209,7 +210,8 @@ public class ItemImpl implements Equine<ItemEntity> {
         boolean isClingy(ItemStack stack);
 
         default ParticleEffect getParticleEffect(IItemEntity entity) {
-            return ParticleTypes.AMBIENT_ENTITY_EFFECT;
+            // TODO: was AMBIENT_ENTITY_EFFECT
+            return ParticleTypes.EFFECT;
         }
 
         default float getFollowDistance(IItemEntity entity) {

src/main/java/com/minelittlepony/unicopia/entity/ItemTracker.java

@@ -16,6 +16,7 @@ import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.util.Identifier;
 import net.minecraft.registry.Registries;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 
 public class ItemTracker implements NbtSerialisable, Copyable<ItemTracker>, Tickable, TrinketsDelegate.Inventory {
     public static final long TICKS = 1;
@@ -115,14 +116,14 @@ public class ItemTracker implements NbtSerialisable, Copyable<ItemTracker>, Tick
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
         items.forEach((charm, count) -> {
             compound.putLong(Registries.ITEM.getId(charm.asItem()).toString(), count);
         });
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
         items.clear();
         compound.getKeys().stream().map(Identifier::tryParse)
             .filter(Objects::nonNull)

src/main/java/com/minelittlepony/unicopia/entity/Living.java

@@ -42,7 +42,6 @@ import com.minelittlepony.unicopia.util.*;
 
 import net.fabricmc.fabric.api.util.TriState;
 import net.minecraft.block.BlockState;
-import net.minecraft.enchantment.Enchantment;
 import net.minecraft.enchantment.EnchantmentHelper;
 import net.minecraft.entity.*;
 import net.minecraft.entity.attribute.EntityAttribute;
@@ -59,6 +58,9 @@ import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.network.packet.s2c.play.EntityPassengersSetS2CPacket;
 import net.minecraft.particle.ParticleTypes;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.registry.tag.DamageTypeTags;
 import net.minecraft.server.world.ServerWorld;
 import net.minecraft.sound.BlockSoundGroup;
@@ -252,7 +254,7 @@ public abstract class Living<T extends LivingEntity> implements Equine<T>, Caste
     }
 
     @Override
-    public final @Nullable EntityAttributeInstance getAttributeInstance(EntityAttribute attribute) {
+    public final @Nullable EntityAttributeInstance getAttributeInstance(RegistryEntry<EntityAttribute> attribute) {
         return asEntity().getAttributeInstance(attribute);
     }
 
@@ -373,8 +375,8 @@ public abstract class Living<T extends LivingEntity> implements Equine<T>, Caste
             if (magical.isIn(UTags.DamageTypes.BREAKS_SUNGLASSES)) {
                 ItemStack glasses = GlassesItem.getForEntity(entity).stack();
                 if (glasses.isOf(UItems.SUNGLASSES)) {
-                    ItemStack broken = UItems.BROKEN_SUNGLASSES.getDefaultStack();
+                    // TODO: BreaksIntoItemComponent
-                    broken.setNbt(glasses.getNbt());
+                    ItemStack broken = glasses.withItem(UItems.BROKEN_SUNGLASSES);
                     TrinketsDelegate.getInstance(entity).setEquippedStack(entity, TrinketsDelegate.FACE, broken);
                     playSound(USounds.ITEM_SUNGLASSES_SHATTER, 1, 1);
                 }
@@ -450,34 +452,35 @@ public abstract class Living<T extends LivingEntity> implements Equine<T>, Caste
 
     @Override
     public float getCloudWalkingStrength() {
-        Enchantment featherFalling = net.minecraft.enchantment.Enchantments.FEATHER_FALLING;
+        return asWorld().getRegistryManager().get(RegistryKeys.ENCHANTMENT).getEntry(net.minecraft.enchantment.Enchantments.FEATHER_FALLING).map(featherFalling -> {
-        int maxLevel = featherFalling.getMaxLevel();
+            int maxLevel = featherFalling.value().getMaxLevel();
             int level = EnchantmentHelper.getEquipmentLevel(featherFalling, entity);
             return MathHelper.clamp(level / (float)maxLevel, 0, 1);
+        }).orElse(0F);
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
         enchants.toNBT(compound);
-        spells.getSlots().toNBT(compound);
+        spells.getSlots().toNBT(compound, lookup);
         getCarrierId().ifPresent(id -> compound.putUuid("carrier", id));
-        toSyncronisedNbt(compound);
+        toSyncronisedNbt(compound, lookup);
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
         enchants.fromNBT(compound);
-        spells.getSlots().fromNBT(compound);
+        spells.getSlots().fromNBT(compound, lookup);
         setCarrier(compound.containsUuid("carrier") ? compound.getUuid("carrier") : null);
-        fromSynchronizedNbt(compound);
+        fromSynchronizedNbt(compound, lookup);
     }
 
-    public void toSyncronisedNbt(NbtCompound compound) {
+    public void toSyncronisedNbt(NbtCompound compound, WrapperLookup lookup) {
-        compound.put("armour", armour.toNBT());
+        compound.put("armour", armour.toNBT(lookup));
     }
 
-    public void fromSynchronizedNbt(NbtCompound compound) {
+    public void fromSynchronizedNbt(NbtCompound compound, WrapperLookup lookup) {
-        armour.fromNBT(compound.getCompound("armour"));
+        armour.fromNBT(compound.getCompound("armour"), lookup);
     }
 
     public void updateVelocity() {

src/main/java/com/minelittlepony/unicopia/entity/effect/EffectUtils.java

@@ -2,10 +2,11 @@ package com.minelittlepony.unicopia.entity.effect;
 
 import com.minelittlepony.unicopia.InteractionManager;
 
+import net.minecraft.component.type.AttributeModifiersComponent;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.effect.StatusEffect;
 import net.minecraft.entity.effect.StatusEffectInstance;
-import net.minecraft.item.ItemStack;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
 import net.minecraft.util.StringHelper;
@@ -23,7 +24,7 @@ public interface EffectUtils {
         return getAmplifier(entity, UEffects.BROKEN_WINGS) > 1;
     }
 
-    static int getAmplifier(LivingEntity entity, StatusEffect effect) {
+    static int getAmplifier(LivingEntity entity, RegistryEntry<StatusEffect> effect) {
         return entity.hasStatusEffect(effect) ? entity.getStatusEffect(effect).getAmplifier() + 1 : 0;
     }
 
@@ -35,7 +36,7 @@ public interface EffectUtils {
         return entity.hasStatusEffect(UEffects.FORTIFICATION);
     }
 
-    static boolean applyStatusEffect(LivingEntity entity, StatusEffect effect, boolean apply) {
+    static boolean applyStatusEffect(LivingEntity entity, RegistryEntry<StatusEffect> effect, boolean apply) {
         if (entity.getWorld().isClient) {
             return false;
         }
@@ -62,14 +63,14 @@ public interface EffectUtils {
 
     static Text formatModifierChange(String modifierName, float change, boolean isDetrimental) {
         return Text.literal(" ").append(Text.translatable("attribute.modifier." + (change > 0 ? "plus" : "take") + ".0",
-                ItemStack.MODIFIER_FORMAT.format(Math.abs(change)),
+                AttributeModifiersComponent.DECIMAL_FORMAT.format(Math.abs(change)),
                 Text.translatable(modifierName)
         ).formatted((isDetrimental ? change : -change) < 0 ? Formatting.DARK_GREEN : Formatting.RED));
     }
 
     static Text formatModifierChange(Text modifierName, float change, boolean isDetrimental) {
         return Text.literal(" ").append(Text.translatable("attribute.modifier." + (change > 0 ? "plus" : "take") + ".0",
-                ItemStack.MODIFIER_FORMAT.format(Math.abs(change)),
+                AttributeModifiersComponent.DECIMAL_FORMAT.format(Math.abs(change)),
                modifierName
         ).formatted((isDetrimental ? change : -change) < 0 ? Formatting.DARK_GREEN : Formatting.RED));
     }

src/main/java/com/minelittlepony/unicopia/entity/effect/UEffects.java

@@ -5,30 +5,31 @@ import com.minelittlepony.unicopia.Unicopia;
 import net.minecraft.entity.effect.StatusEffect;
 import net.minecraft.entity.effect.StatusEffectCategory;
 import net.minecraft.registry.Registry;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.registry.Registries;
 
 public interface UEffects {
-    StatusEffect FOOD_POISONING = register("food_poisoning", new FoodPoisoningStatusEffect(3484199));
+    RegistryEntry<StatusEffect> FOOD_POISONING = register("food_poisoning", new FoodPoisoningStatusEffect(3484199));
-    StatusEffect SUN_BLINDNESS = register("sun_blindness", new SunBlindnessStatusEffect(0x886F0F));
+    RegistryEntry<StatusEffect> SUN_BLINDNESS = register("sun_blindness", new SunBlindnessStatusEffect(0x886F0F));
     /**
      * Status effect emitted by players with a high level of corruption.
      * When affecting an entity, will give them a random chance to reproduce or duplicate themselves when they die.
      */
-    StatusEffect CORRUPT_INFLUENCE = register("corrupt_influence", new CorruptInfluenceStatusEffect(0x00FF00));
+    RegistryEntry<StatusEffect> CORRUPT_INFLUENCE = register("corrupt_influence", new CorruptInfluenceStatusEffect(0x00FF00));
-    StatusEffect PARALYSIS = register("paralysis", new SimpleStatusEffect(StatusEffectCategory.HARMFUL, 0, false));
+    RegistryEntry<StatusEffect> PARALYSIS = register("paralysis", new SimpleStatusEffect(StatusEffectCategory.HARMFUL, 0, false));
-    StatusEffect FORTIFICATION = register("fortification", new SimpleStatusEffect(StatusEffectCategory.BENEFICIAL, 0x000077, false));
+    RegistryEntry<StatusEffect> FORTIFICATION = register("fortification", new SimpleStatusEffect(StatusEffectCategory.BENEFICIAL, 0x000077, false));
-    StatusEffect BROKEN_WINGS = register("broken_wings", new SimpleStatusEffect(StatusEffectCategory.BENEFICIAL, 0xEEAA00, false));
+    RegistryEntry<StatusEffect> BROKEN_WINGS = register("broken_wings", new SimpleStatusEffect(StatusEffectCategory.BENEFICIAL, 0xEEAA00, false));
     /**
      * Side-effect of wearing the alicorn amulet.
      * Causes the player to lose grip on whatever item they're holding.
      */
-    StatusEffect BUTTER_FINGERS = register("butter_fingers", new ButterfingersStatusEffect(0x888800));
+    RegistryEntry<StatusEffect> BUTTER_FINGERS = register("butter_fingers", new ButterfingersStatusEffect(0x888800));
 
-    StatusEffect SEAPONYS_GRACE = register("seaponys_grace", new SimpleStatusEffect(StatusEffectCategory.BENEFICIAL, 0x0000EE, false));
+    RegistryEntry<StatusEffect> SEAPONYS_GRACE = register("seaponys_grace", new SimpleStatusEffect(StatusEffectCategory.BENEFICIAL, 0x0000EE, false));
-    StatusEffect SEAPONYS_IRE = register("seaponys_ire", new SimpleStatusEffect(StatusEffectCategory.HARMFUL, 0xEE00EE, false));
+    RegistryEntry<StatusEffect> SEAPONYS_IRE = register("seaponys_ire", new SimpleStatusEffect(StatusEffectCategory.HARMFUL, 0xEE00EE, false));
 
-    private static StatusEffect register(String name, StatusEffect effect) {
+    private static RegistryEntry<StatusEffect> register(String name, StatusEffect effect) {
-        return Registry.register(Registries.STATUS_EFFECT, Unicopia.id(name), effect);
+        return Registry.registerReference(Registries.STATUS_EFFECT, Unicopia.id(name), effect);
     }
 
     static void bootstrap() {}

src/main/java/com/minelittlepony/unicopia/entity/mob/ButterflyEntity.java

@@ -1,13 +1,9 @@
 package com.minelittlepony.unicopia.entity.mob;
 
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Optional;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-
 import org.jetbrains.annotations.Nullable;
 
 import com.minelittlepony.unicopia.USounds;
@@ -15,9 +11,9 @@ import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.item.ButterflyItem;
 import com.minelittlepony.unicopia.util.NbtSerialisable;
 
+import io.netty.buffer.ByteBuf;
 import net.minecraft.block.BlockState;
 import net.minecraft.entity.Entity;
-import net.minecraft.entity.EntityPose;
 import net.minecraft.entity.EntityType;
 import net.minecraft.entity.ItemEntity;
 import net.minecraft.entity.SpawnReason;
@@ -27,16 +23,20 @@ import net.minecraft.entity.damage.DamageSource;
 import net.minecraft.entity.data.DataTracker;
 import net.minecraft.entity.data.TrackedData;
 import net.minecraft.entity.data.TrackedDataHandlerRegistry;
+import net.minecraft.entity.data.DataTracker.Builder;
 import net.minecraft.entity.mob.AmbientEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NbtCompound;
+import net.minecraft.network.codec.PacketCodec;
+import net.minecraft.network.codec.PacketCodecs;
 import net.minecraft.predicate.entity.EntityPredicates;
 import net.minecraft.sound.SoundEvent;
 import net.minecraft.registry.tag.BlockTags;
 import net.minecraft.registry.tag.ItemTags;
 import net.minecraft.util.Hand;
 import net.minecraft.util.Identifier;
+import net.minecraft.util.StringIdentifiable;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
@@ -73,6 +73,7 @@ public class ButterflyEntity extends AmbientEntity {
     }
 
     public static boolean canSpawn(EntityType<? extends ButterflyEntity> type, WorldAccess world, SpawnReason spawnReason, BlockPos pos, Random random) {
+        // TODO: Uncomment this
         return true;//world.getBlockState(pos.down()).isIn(UTags.Blocks.BUTTERFLIES_SPAWNABLE_ON);
     }
 
@@ -104,10 +105,10 @@ public class ButterflyEntity extends AmbientEntity {
     }
 
     @Override
-    protected void initDataTracker() {
+    protected void initDataTracker(Builder builder) {
-        super.initDataTracker();
+        super.initDataTracker(builder);
-        getDataTracker().startTracking(VARIANT, Variant.BUTTERFLY.ordinal());
+        builder.add(VARIANT, Variant.BUTTERFLY.ordinal());
-        getDataTracker().startTracking(RESTING, false);
+        builder.add(RESTING, false);
     }
 
     @Override
@@ -330,11 +331,6 @@ public class ButterflyEntity extends AmbientEntity {
         return reason != SpawnReason.NATURAL || (getY() >= world.getSeaLevel() && world.getLightLevel(getBlockPos()) > 3);
     }
 
-    @Override
-    public float getEyeHeight(EntityPose pose) {
-        return getHeight() / 2;
-    }
-
     @Override
     public ItemEntity dropStack(ItemStack stack, float yOffset) {
         return super.dropStack(ButterflyItem.setVariant(stack, getVariant()), yOffset);
@@ -345,8 +341,12 @@ public class ButterflyEntity extends AmbientEntity {
         super.writeCustomDataToNbt(nbt);
         nbt.putInt("ticksResting", ticksResting);
         nbt.putInt("breedingCooldown", breedingCooldown);
-        NbtSerialisable.BLOCK_POS.writeOptional("hoveringPosition", nbt, hoveringPosition);
+        hoveringPosition.ifPresent(pos -> {
-        NbtSerialisable.BLOCK_POS.writeOptional("flowerPosition", nbt, flowerPosition);
+            nbt.put("hoveringPosition", NbtSerialisable.encode(BlockPos.CODEC, pos));
+        });
+        flowerPosition.ifPresent(pos -> {
+            nbt.put("flowerPosition", NbtSerialisable.encode(BlockPos.CODEC, pos));
+        });
         NbtCompound visited = new NbtCompound();
         this.visited.forEach((pos, time) -> {
             visited.putLong(String.valueOf(pos.asLong()), time);
@@ -359,8 +359,8 @@ public class ButterflyEntity extends AmbientEntity {
         super.readCustomDataFromNbt(nbt);
         ticksResting = nbt.getInt("ticksResting");
         breedingCooldown = nbt.getInt("breedingCooldown");
-        hoveringPosition = NbtSerialisable.BLOCK_POS.readOptional("hoveringPosition", nbt);
+        hoveringPosition = NbtSerialisable.decode(BlockPos.CODEC, nbt.get("hoveringPosition"));
-        flowerPosition = NbtSerialisable.BLOCK_POS.readOptional("flowerPosition", nbt);
+        flowerPosition = NbtSerialisable.decode(BlockPos.CODEC, nbt.get("flowerPosition"));
         NbtCompound visited = nbt.getCompound("visited");
         this.visited.clear();
         visited.getKeys().forEach(key -> {
@@ -370,7 +370,7 @@ public class ButterflyEntity extends AmbientEntity {
         });
     }
 
-    public enum Variant {
+    public enum Variant implements StringIdentifiable {
         BUTTERFLY,
         YELLOW,
         LIME,
@@ -388,9 +388,12 @@ public class ButterflyEntity extends AmbientEntity {
         BRIMSTONE;
 
         public static final Variant[] VALUES = Variant.values();
-        private static final Map<String, Variant> REGISTRY = Arrays.stream(VALUES).collect(Collectors.toMap(a -> a.name().toLowerCase(Locale.ROOT), Function.identity()));
 
-        private final Identifier skin = Unicopia.id("textures/entity/butterfly/" + name().toLowerCase(Locale.ROOT) + ".png");
+        public static final EnumCodec<Variant> CODEC = StringIdentifiable.createCodec(Variant::values);
+        public static final PacketCodec<ByteBuf, Variant> PACKET_CODEC = PacketCodecs.indexed(i -> VALUES[i], Variant::ordinal);
+
+        private final String name = name().toLowerCase(Locale.ROOT);
+        private final Identifier skin = Unicopia.id("textures/entity/butterfly/" + name + ".png");
 
         public Identifier getSkin() {
             return skin;
@@ -405,7 +408,12 @@ public class ButterflyEntity extends AmbientEntity {
         }
 
         public static Variant byName(String name) {
-            return REGISTRY.getOrDefault(name == null ? "" : name, BUTTERFLY);
+            return CODEC.byId(name, BUTTERFLY);
+        }
+
+        @Override
+        public String asString() {
+            return name;
         }
     }
 }

src/main/java/com/minelittlepony/unicopia/entity/mob/SpellbookEntity.java

@@ -12,11 +12,12 @@ import com.minelittlepony.unicopia.container.SpellbookScreenHandler;
 import com.minelittlepony.unicopia.container.SpellbookState;
 import com.minelittlepony.unicopia.entity.MagicImmune;
 import com.minelittlepony.unicopia.item.UItems;
+import com.minelittlepony.unicopia.item.component.UDataComponentTypes;
 import com.minelittlepony.unicopia.network.Channel;
 import com.minelittlepony.unicopia.network.MsgSpellbookStateChanged;
 import com.minelittlepony.unicopia.server.world.Altar;
 import com.minelittlepony.unicopia.util.MeteorlogicalUtil;
-
+import com.minelittlepony.unicopia.util.NbtSerialisable;
 import net.fabricmc.fabric.api.screenhandler.v1.ExtendedScreenHandlerFactory;
 import net.fabricmc.fabric.api.util.TriState;
 import net.minecraft.block.Blocks;
@@ -27,12 +28,12 @@ import net.minecraft.entity.damage.DamageSource;
 import net.minecraft.entity.data.DataTracker;
 import net.minecraft.entity.data.TrackedData;
 import net.minecraft.entity.data.TrackedDataHandlerRegistry;
+import net.minecraft.entity.data.DataTracker.Builder;
 import net.minecraft.entity.mob.MobEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.entity.player.PlayerInventory;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NbtCompound;
-import net.minecraft.network.PacketByteBuf;
 import net.minecraft.particle.ParticleTypes;
 import net.minecraft.predicate.entity.EntityPredicates;
 import net.minecraft.screen.*;
@@ -62,7 +63,7 @@ public class SpellbookEntity extends MobEntity implements MagicImmune {
     private int activeTicks = TICKS_TO_SLEEP;
     private boolean prevDaytime;
 
-    private final SpellbookState state = new SpellbookState();
+    private SpellbookState state = new SpellbookState();
 
     private Optional<Altar> altar = Optional.empty();
 
@@ -91,20 +92,25 @@ public class SpellbookEntity extends MobEntity implements MagicImmune {
     }
 
     @Override
-    protected void initDataTracker() {
+    protected void initDataTracker(Builder builder) {
-        super.initDataTracker();
+        super.initDataTracker(builder);
-        dataTracker.startTracking(LOCKED, (byte)1);
+        builder.add(LOCKED, (byte)1);
-        dataTracker.startTracking(ALTERED, false);
+        builder.add(ALTERED, false);
     }
 
     public SpellbookState getSpellbookState() {
         return state;
     }
 
+    public void setSpellbookState(SpellbookState state) {
+        state.copySyncronizer(this.state);
+        this.state = state;
+    }
+
     @Override
     public ItemStack getPickBlockStack() {
         ItemStack stack = UItems.SPELLBOOK.getDefaultStack();
-        stack.getOrCreateNbt().put("spellbookState", state.toNBT());
+        stack.set(UDataComponentTypes.SPELLBOOK_STATE, state.createCopy());
         return stack;
     }
 
@@ -345,7 +351,7 @@ public class SpellbookEntity extends MobEntity implements MagicImmune {
 
         if (isOpen()) {
             keepAwake();
-            player.openHandledScreen(new ExtendedScreenHandlerFactory() {
+            player.openHandledScreen(new ExtendedScreenHandlerFactory<SpellbookState>() {
                 @Override
                 public Text getDisplayName() {
                     return SpellbookEntity.this.getDisplayName();
@@ -357,8 +363,8 @@ public class SpellbookEntity extends MobEntity implements MagicImmune {
                 }
 
                 @Override
-                public void writeScreenOpeningData(ServerPlayerEntity player, PacketByteBuf buf) {
+                public SpellbookState getScreenOpeningData(ServerPlayerEntity player) {
-                    state.toPacket(buf);
+                    return state;
                 }
             });
             player.playSound(USounds.Vanilla.ITEM_BOOK_PAGE_TURN, 2, 1);
@@ -385,8 +391,8 @@ public class SpellbookEntity extends MobEntity implements MagicImmune {
         activeTicks = compound.getInt("activeTicks");
         setAltered(compound.getBoolean("altered"));
         setForcedState(compound.contains("locked") ? TriState.of(compound.getBoolean("locked")) : TriState.DEFAULT);
-        state.fromNBT(compound.getCompound("spellbookState"));
+        state.fromNBT(compound.getCompound("spellbookState"), getWorld().getRegistryManager());
-        altar = Altar.SERIALIZER.readOptional("altar", compound);
+        altar = NbtSerialisable.decode(Altar.CODEC, compound.get("altar"));
     }
 
     @Override
@@ -395,12 +401,14 @@ public class SpellbookEntity extends MobEntity implements MagicImmune {
         compound.putInt("activeTicks", activeTicks);
         compound.putBoolean("prevDaytime", prevDaytime);
         compound.putBoolean("altered", isAltered());
-        compound.put("spellbookState", state.toNBT());
+        compound.put("spellbookState", state.toNBT(getWorld().getRegistryManager()));
         getForcedState().map(t -> {
             compound.putBoolean("locked", t);
             return null;
         });
-        Altar.SERIALIZER.writeOptional("altar", compound, altar);
+        altar.ifPresent(altar -> {
+            compound.put("altar", NbtSerialisable.encode(Altar.CODEC, altar));
+        });
     }
 
     @Override

src/main/java/com/minelittlepony/unicopia/entity/mob/StormCloudEntity.java

@@ -26,6 +26,7 @@ import net.minecraft.entity.data.TrackedData;
 import net.minecraft.entity.data.TrackedDataHandlerRegistry;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.ItemStack;
+import net.minecraft.loot.LootTable;
 import net.minecraft.loot.context.LootContextParameterSet;
 import net.minecraft.loot.context.LootContextParameters;
 import net.minecraft.loot.context.LootContextTypes;
@@ -33,11 +34,12 @@ import net.minecraft.nbt.NbtCompound;
 import net.minecraft.nbt.NbtElement;
 import net.minecraft.particle.ParticleTypes;
 import net.minecraft.predicate.entity.EntityPredicates;
+import net.minecraft.registry.RegistryKey;
+import net.minecraft.registry.RegistryKeys;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.server.world.ServerWorld;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
-import net.minecraft.util.Identifier;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.util.math.MathHelper;
 import net.minecraft.util.math.Vec3d;
@@ -73,11 +75,11 @@ public class StormCloudEntity extends Entity implements MagicImmune {
     }
 
     @Override
-    protected void initDataTracker() {
+    protected void initDataTracker(DataTracker.Builder builder) {
-        dataTracker.startTracking(STORM_TICKS, 0);
+        builder.add(STORM_TICKS, 0);
-        dataTracker.startTracking(CLEAR_TICKS, 0);
+        builder.add(CLEAR_TICKS, 0);
-        dataTracker.startTracking(TARGET_SIZE, 1F);
+        builder.add(TARGET_SIZE, 1F);
-        dataTracker.startTracking(DISSIPATING, false);
+        builder.add(DISSIPATING, false);
     }
 
     public boolean isStormy() {
@@ -295,17 +297,17 @@ public class StormCloudEntity extends Entity implements MagicImmune {
             if (random.nextInt(35) == 0 || (source.isOf(DamageTypes.PLAYER_ATTACK) && EquineContext.of(source.getAttacker()).collidesWithClouds())) {
                 if (getSize(1) < 2) {
                     if (!getWorld().isClient() && getWorld().getGameRules().getBoolean(GameRules.DO_MOB_LOOT)) {
-                        Identifier identifier = getType().getLootTableId();
+                        RegistryKey<LootTable> table = getType().getLootTableId();
                         LootContextParameterSet.Builder builder = new LootContextParameterSet.Builder((ServerWorld)this.getWorld())
                                 .add(LootContextParameters.THIS_ENTITY, this)
                                 .add(LootContextParameters.ORIGIN, this.getPos())
                                 .add(LootContextParameters.DAMAGE_SOURCE, source)
-                                .addOptional(LootContextParameters.KILLER_ENTITY, source.getAttacker())
+                                .addOptional(LootContextParameters.ATTACKING_ENTITY, source.getAttacker())
-                                .addOptional(LootContextParameters.DIRECT_KILLER_ENTITY, source.getSource());
+                                .addOptional(LootContextParameters.DIRECT_ATTACKING_ENTITY, source.getSource());
                         if (source.getAttacker() instanceof PlayerEntity player) {
                             builder = builder.add(LootContextParameters.LAST_DAMAGE_PLAYER, player).luck(player.getLuck());
                         }
-                        getWorld().getServer().getLootManager().getLootTable(identifier)
+                        getWorld().getRegistryManager().get(RegistryKeys.LOOT_TABLE).get(table)
                             .generateLoot(builder.build(LootContextTypes.ENTITY), 0L, this::dropStack);
                     }
                     kill();

src/main/java/com/minelittlepony/unicopia/entity/mob/UEntities.java

@@ -1,7 +1,5 @@
 package com.minelittlepony.unicopia.entity.mob;
 
-import java.util.HashSet;
-import java.util.Set;
 import java.util.function.Predicate;
 
 import com.minelittlepony.unicopia.Unicopia;
@@ -13,14 +11,11 @@ import com.minelittlepony.unicopia.projectile.PhysicsBodyProjectileEntity;
 import net.fabricmc.fabric.api.biome.v1.BiomeModifications;
 import net.fabricmc.fabric.api.biome.v1.BiomeSelectionContext;
 import net.fabricmc.fabric.api.biome.v1.BiomeSelectors;
-import net.fabricmc.fabric.api.object.builder.v1.entity.FabricDefaultAttributeRegistry;
+import net.fabricmc.fabric.api.object.builder.v1.entity.FabricEntityType;
-import net.fabricmc.fabric.api.object.builder.v1.entity.FabricEntityTypeBuilder;
 import net.minecraft.entity.Entity;
-import net.minecraft.entity.EntityDimensions;
 import net.minecraft.entity.EntityType;
 import net.minecraft.entity.SpawnGroup;
-import net.minecraft.entity.SpawnRestriction.Location;
+import net.minecraft.entity.SpawnLocationTypes;
-import net.minecraft.entity.decoration.painting.PaintingVariant;
 import net.minecraft.entity.mob.FlyingEntity;
 import net.minecraft.entity.mob.HostileEntity;
 import net.minecraft.registry.*;
@@ -28,91 +23,92 @@ import net.minecraft.registry.tag.BiomeTags;
 import net.minecraft.world.Heightmap.Type;
 
 public interface UEntities {
-    EntityType<ButterflyEntity> BUTTERFLY = register("butterfly", FabricEntityTypeBuilder.createMob().spawnGroup(SpawnGroup.AMBIENT).entityFactory(ButterflyEntity::new)
+    EntityType<ButterflyEntity> BUTTERFLY = register("butterfly", FabricEntityType.Builder.createMob(ButterflyEntity::new, SpawnGroup.AMBIENT, builder -> builder
-            .spawnRestriction(Location.NO_RESTRICTIONS, Type.MOTION_BLOCKING_NO_LEAVES, ButterflyEntity::canSpawn)
+                .spawnRestriction(SpawnLocationTypes.UNRESTRICTED, Type.MOTION_BLOCKING_NO_LEAVES, ButterflyEntity::canSpawn)
+                .defaultAttributes(ButterflyEntity::createButterflyAttributes))
             .spawnableFarFromPlayer()
-            .dimensions(EntityDimensions.fixed(0.25F, 0.25F)));
+            .dimensions(0.25F, 0.25F)
-    EntityType<MagicProjectileEntity> THROWN_ITEM = register("thrown_item", FabricEntityTypeBuilder.<MagicProjectileEntity>create(SpawnGroup.MISC, MagicProjectileEntity::new)
+            .eyeHeight(0.125F));
-            .trackRangeBlocks(100)
+    EntityType<MagicProjectileEntity> THROWN_ITEM = register("thrown_item", EntityType.Builder.<MagicProjectileEntity>create(MagicProjectileEntity::new, SpawnGroup.MISC)
+            .maxTrackingRange(100)
             .disableSummon()
-            .trackedUpdateRate(2)
+            .trackingTickInterval(2)
-            .dimensions(EntityDimensions.fixed(0.25F, 0.25F)));
+            .dimensions(0.25F, 0.25F));
-    EntityType<PhysicsBodyProjectileEntity> MUFFIN = register("muffin", FabricEntityTypeBuilder.<PhysicsBodyProjectileEntity>create(SpawnGroup.MISC, (type, world) -> new PhysicsBodyProjectileEntity(type, world, UItems.MUFFIN.getDefaultStack()))
+    EntityType<PhysicsBodyProjectileEntity> MUFFIN = register("muffin", EntityType.Builder.<PhysicsBodyProjectileEntity>create((type, world) -> new PhysicsBodyProjectileEntity(type, world, UItems.MUFFIN.getDefaultStack()), SpawnGroup.MISC)
-            .trackRangeBlocks(100)
+            .maxTrackingRange(100)
             .disableSummon()
-            .trackedUpdateRate(2)
+            .trackingTickInterval(2)
-            .dimensions(EntityDimensions.fixed(0.25F, 0.25F)));
+            .dimensions(0.25F, 0.25F));
-    EntityType<MagicBeamEntity> MAGIC_BEAM = register("magic_beam", FabricEntityTypeBuilder.<MagicBeamEntity>create(SpawnGroup.MISC, MagicBeamEntity::new)
+    EntityType<MagicBeamEntity> MAGIC_BEAM = register("magic_beam", EntityType.Builder.<MagicBeamEntity>create(MagicBeamEntity::new, SpawnGroup.MISC)
-            .trackRangeBlocks(100)
+            .maxTrackingRange(100)
             .disableSummon()
-            .trackedUpdateRate(2)
+            .trackingTickInterval(2)
-            .dimensions(EntityDimensions.fixed(0.25F, 0.25F)));
+            .alwaysUpdateVelocity(true)
-    EntityType<FloatingArtefactEntity> FLOATING_ARTEFACT = register("floating_artefact", FabricEntityTypeBuilder.create(SpawnGroup.MISC, FloatingArtefactEntity::new)
+            .dimensions(0.25F, 0.25F));
-            .trackRangeBlocks(200)
+    EntityType<FloatingArtefactEntity> FLOATING_ARTEFACT = register("floating_artefact", EntityType.Builder.create(FloatingArtefactEntity::new, SpawnGroup.MISC)
+            .maxTrackingRange(200)
             .disableSummon()
-            .dimensions(EntityDimensions.fixed(1, 1)));
+            .dimensions(1, 1));
-    EntityType<CastSpellEntity> CAST_SPELL = register("cast_spell", FabricEntityTypeBuilder.<CastSpellEntity>create(SpawnGroup.MISC, CastSpellEntity::new)
+    EntityType<CastSpellEntity> CAST_SPELL = register("cast_spell", EntityType.Builder.<CastSpellEntity>create(CastSpellEntity::new, SpawnGroup.MISC)
-            .trackRangeBlocks(200)
+            .maxTrackingRange(200)
             .disableSummon()
-            .dimensions(EntityDimensions.changing(4, 4)));
+            .dimensions(4, 4));
-    EntityType<FairyEntity> TWITTERMITE = register("twittermite", FabricEntityTypeBuilder.create(SpawnGroup.MISC, FairyEntity::new)
+    EntityType<FairyEntity> TWITTERMITE = register("twittermite", FabricEntityType.Builder.createMob(FairyEntity::new, SpawnGroup.MISC, builder -> builder
-            .trackRangeBlocks(200)
+                .defaultAttributes(FairyEntity::createMobAttributes))
-            .dimensions(EntityDimensions.fixed(0.1F, 0.1F)));
+            .maxTrackingRange(200)
-    EntityType<FriendlyCreeperEntity> FRIENDLY_CREEPER = register("friendly_creeper", FabricEntityTypeBuilder.create(SpawnGroup.MISC, FriendlyCreeperEntity::new)
+            .dimensions(0.1F, 0.1F));
-            .trackRangeChunks(8)
+    EntityType<FriendlyCreeperEntity> FRIENDLY_CREEPER = register("friendly_creeper", FabricEntityType.Builder.createMob(FriendlyCreeperEntity::new, SpawnGroup.MISC, builder -> builder
+                .defaultAttributes(FriendlyCreeperEntity::createCreeperAttributes))
+            .maxTrackingRange(8)
             .disableSummon()
-            .dimensions(EntityDimensions.fixed(0.6f, 1.7f)));
+            .dimensions(0.6f, 1.7f));
-    EntityType<SpellbookEntity> SPELLBOOK = register("spellbook", FabricEntityTypeBuilder.create(SpawnGroup.MISC, SpellbookEntity::new)
+    EntityType<SpellbookEntity> SPELLBOOK = register("spellbook", FabricEntityType.Builder.createMob(SpellbookEntity::new, SpawnGroup.MISC, builder -> builder
-            .trackRangeBlocks(200)
+                .defaultAttributes(SpellbookEntity::createMobAttributes))
-            .dimensions(EntityDimensions.fixed(0.9F, 0.5F)));
+            .maxTrackingRange(200)
-    EntityType<SombraEntity> SOMBRA = register("sombra", FabricEntityTypeBuilder.<SombraEntity>create(SpawnGroup.MONSTER, SombraEntity::new)
+            .dimensions(0.9F, 0.5F));
-            .trackRangeBlocks(200)
+    EntityType<SombraEntity> SOMBRA = register("sombra", FabricEntityType.Builder.<SombraEntity>createMob(SombraEntity::new, SpawnGroup.MONSTER, builder -> builder
-            .dimensions(EntityDimensions.changing(2F, 4F)));
+                .defaultAttributes(SombraEntity::createMobAttributes))
-    EntityType<CrystalShardsEntity> CRYSTAL_SHARDS = register("crystal_shards", FabricEntityTypeBuilder.create(SpawnGroup.MISC, CrystalShardsEntity::new)
+            .maxTrackingRange(200)
-            .trackRangeBlocks(100)
+            .dimensions(2F, 4F));
-            .dimensions(EntityDimensions.changing(1F, 1F)));
+    EntityType<CrystalShardsEntity> CRYSTAL_SHARDS = register("crystal_shards", EntityType.Builder.create(CrystalShardsEntity::new, SpawnGroup.MISC)
-    EntityType<StormCloudEntity> STORM_CLOUD = register("storm_cloud", FabricEntityTypeBuilder.create(SpawnGroup.MISC, StormCloudEntity::new)
+            .maxTrackingRange(100)
-            .trackRangeBlocks(200)
+            .dimensions(1F, 1F));
-            .dimensions(EntityDimensions.changing(20F, 20F)));
+    EntityType<StormCloudEntity> STORM_CLOUD = register("storm_cloud", EntityType.Builder.create(StormCloudEntity::new, SpawnGroup.MISC)
-    EntityType<AirBalloonEntity> AIR_BALLOON = register("air_balloon", FabricEntityTypeBuilder.create(SpawnGroup.MISC, AirBalloonEntity::new)
+            .maxTrackingRange(200)
-            .trackRangeBlocks(1000)
+            .dimensions(20F, 20F));
-            .dimensions(EntityDimensions.changing(2.5F, 0.1F)));
+    EntityType<AirBalloonEntity> AIR_BALLOON = register("air_balloon", FabricEntityType.Builder.createMob(AirBalloonEntity::new, SpawnGroup.MISC, builder -> builder
-    EntityType<LootBugEntity> LOOT_BUG = register("loot_bug", FabricEntityTypeBuilder.create(SpawnGroup.MONSTER, LootBugEntity::new)
+                .defaultAttributes(FlyingEntity::createMobAttributes))
-            .trackRangeChunks(8)
+            .maxTrackingRange(1000)
-            .dimensions(EntityDimensions.fixed(0.8F, 0.6F)));
+            .dimensions(2.5F, 0.1F));
-    EntityType<TentacleEntity> TENTACLE = register("ignominious_vine", FabricEntityTypeBuilder.<TentacleEntity>create(SpawnGroup.MISC, TentacleEntity::new)
+    EntityType<LootBugEntity> LOOT_BUG = register("loot_bug", FabricEntityType.Builder.createMob(LootBugEntity::new, SpawnGroup.MONSTER, builder -> builder
-            .trackRangeChunks(8)
+                .defaultAttributes(LootBugEntity::createSilverfishAttributes))
-            .dimensions(EntityDimensions.fixed(0.8F, 0.8F)));
+            .maxTrackingRange(8)
-    EntityType<IgnominiousBulbEntity> IGNOMINIOUS_BULB = register("ignominious_bulb", FabricEntityTypeBuilder.<IgnominiousBulbEntity>create(SpawnGroup.MISC, IgnominiousBulbEntity::new)
+            .dimensions(0.8F, 0.6F));
-            .trackRangeChunks(8)
+    EntityType<TentacleEntity> TENTACLE = register("ignominious_vine", EntityType.Builder.<TentacleEntity>create(TentacleEntity::new, SpawnGroup.MISC)
-            .dimensions(EntityDimensions.fixed(3, 2)));
+            .maxTrackingRange(8)
-    EntityType<SpecterEntity> SPECTER = register("specter", FabricEntityTypeBuilder.createMob().spawnGroup(SpawnGroup.MONSTER).entityFactory(SpecterEntity::new)
+            .dimensions(0.8F, 0.8F));
-            .spawnRestriction(Location.ON_GROUND, Type.MOTION_BLOCKING_NO_LEAVES, HostileEntity::canSpawnInDark)
+    EntityType<IgnominiousBulbEntity> IGNOMINIOUS_BULB = register("ignominious_bulb", FabricEntityType.Builder.<IgnominiousBulbEntity>createMob(IgnominiousBulbEntity::new, SpawnGroup.MISC, builder -> builder
-            .fireImmune()
+                .defaultAttributes(IgnominiousBulbEntity::createMobAttributes))
+            .maxTrackingRange(8)
+            .dimensions(3, 2));
+    EntityType<SpecterEntity> SPECTER = register("specter", FabricEntityType.Builder.createMob(SpecterEntity::new, SpawnGroup.MONSTER, builder -> builder
+                .spawnRestriction(SpawnLocationTypes.ON_GROUND, Type.MOTION_BLOCKING_NO_LEAVES, HostileEntity::canSpawnInDark)
+                .defaultAttributes(SpecterEntity::createAttributes))
+            .makeFireImmune()
             .spawnableFarFromPlayer()
-            .dimensions(EntityDimensions.fixed(1, 2)));
+            .dimensions(1, 2));
-    EntityType<MimicEntity> MIMIC = register("mimic", FabricEntityTypeBuilder.create(SpawnGroup.MONSTER, MimicEntity::new)
+    EntityType<MimicEntity> MIMIC = register("mimic", FabricEntityType.Builder.createMob(MimicEntity::new, SpawnGroup.MONSTER, builder -> builder
-            .fireImmune()
+                .defaultAttributes(MimicEntity::createMobAttributes))
+            .makeFireImmune()
             .disableSummon()
-            .dimensions(EntityDimensions.changing(0.875F, 0.875F)));
+            .dimensions(0.875F, 0.875F));
 
-    static <T extends Entity> EntityType<T> register(String name, FabricEntityTypeBuilder<T> builder) {
+    static <T extends Entity> EntityType<T> register(String name, EntityType.Builder<T> builder) {
         EntityType<T> type = builder.build();
         return Registry.register(Registries.ENTITY_TYPE, Unicopia.id(name), type);
     }
 
     static void bootstrap() {
-        FabricDefaultAttributeRegistry.register(BUTTERFLY, ButterflyEntity.createButterflyAttributes());
-        FabricDefaultAttributeRegistry.register(SPELLBOOK, SpellbookEntity.createMobAttributes());
-        FabricDefaultAttributeRegistry.register(TWITTERMITE, FairyEntity.createMobAttributes());
-        FabricDefaultAttributeRegistry.register(AIR_BALLOON, FlyingEntity.createMobAttributes());
-        FabricDefaultAttributeRegistry.register(SOMBRA, SombraEntity.createMobAttributes());
-        FabricDefaultAttributeRegistry.register(FRIENDLY_CREEPER, FriendlyCreeperEntity.createCreeperAttributes());
-        FabricDefaultAttributeRegistry.register(LOOT_BUG, LootBugEntity.createSilverfishAttributes());
-        FabricDefaultAttributeRegistry.register(IGNOMINIOUS_BULB, IgnominiousBulbEntity.createMobAttributes());
-        FabricDefaultAttributeRegistry.register(SPECTER, SpecterEntity.createAttributes());
-        FabricDefaultAttributeRegistry.register(MIMIC, MimicEntity.createMobAttributes());
-
         if (!Unicopia.getConfig().disableButterflySpawning.get()) {
             final Predicate<BiomeSelectionContext> butterflySpawnable = BiomeSelectors.foundInOverworld()
                     .and(ctx -> ctx.getBiome().hasPrecipitation() && ctx.getBiome().getTemperature() > 0.15F);
@@ -133,39 +129,5 @@ public interface UEntities {
         UTradeOffers.bootstrap();
         EntityBehaviour.bootstrap();
         UEntityAttributes.bootstrap();
-        Paintings.bootstrap();
-    }
-
-    interface Paintings {
-        Set<PaintingVariant> REGISTRY = new HashSet<>();
-
-        private static void register(String id, int width, int height) {
-            REGISTRY.add(Registry.register(
-                    Registries.PAINTING_VARIANT,
-                    RegistryKey.of(RegistryKeys.PAINTING_VARIANT, Unicopia.id(id)),
-                    new PaintingVariant(16 * width, 16 * height)
-            ));
-        }
-
-        static void bootstrap() {
-            register("bloom", 2, 1);
-            register("chicken", 2, 1);
-            register("bells", 2, 1);
-
-            register("crystal", 3, 3);
-            register("harmony", 3, 3);
-
-            register("equality", 2, 4);
-            register("solar", 2, 4);
-            register("lunar", 2, 4);
-            register("platinum", 2, 4);
-            register("hurricane", 2, 4);
-            register("pudding", 2, 4);
-            register("terra", 2, 4);
-            register("equestria", 2, 4);
-
-            register("blossom", 2, 3);
-            register("shadow", 2, 3);
-        }
     }
 }

src/main/java/com/minelittlepony/unicopia/entity/mob/UEntityAttributes.java

@@ -3,25 +3,26 @@ package com.minelittlepony.unicopia.entity.mob;
 import java.util.ArrayList;
 import java.util.List;
 
-import com.jamieswhiteshirt.reachentityattributes.ReachEntityAttributes;
 import com.minelittlepony.unicopia.Unicopia;
 
 import net.minecraft.entity.attribute.ClampedEntityAttribute;
 import net.minecraft.entity.attribute.EntityAttribute;
+import net.minecraft.entity.attribute.EntityAttributes;
 import net.minecraft.registry.Registry;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.registry.Registries;
 
 public interface UEntityAttributes {
     List<EntityAttribute> REGISTRY = new ArrayList<>();
 
-    EntityAttribute EXTENDED_REACH_DISTANCE = ReachEntityAttributes.REACH;
+    RegistryEntry<EntityAttribute> EXTENDED_REACH_DISTANCE = EntityAttributes.PLAYER_BLOCK_INTERACTION_RANGE;
-    EntityAttribute EXTENDED_ATTACK_DISTANCE = ReachEntityAttributes.ATTACK_RANGE;
+    RegistryEntry<EntityAttribute> EXTENDED_ATTACK_DISTANCE = EntityAttributes.PLAYER_ENTITY_INTERACTION_RANGE;
-    EntityAttribute EXTRA_MINING_SPEED = register("earth.mining_speed", new ClampedEntityAttribute("player.miningSpeed", 1, 0, 5).setTracked(true));
+    RegistryEntry<EntityAttribute> EXTRA_MINING_SPEED = register("earth.mining_speed", new ClampedEntityAttribute("player.miningSpeed", 1, 0, 5).setTracked(true));
-    EntityAttribute ENTITY_GRAVITY_MODIFIER = register("player.gravity", (new EntityAttribute("player.gravityModifier", 1) {}).setTracked(true));
+    RegistryEntry<EntityAttribute> ENTITY_GRAVITY_MODIFIER = register("player.gravity", (new EntityAttribute("player.gravityModifier", 1) {}).setTracked(true));
 
-    private static EntityAttribute register(String name, EntityAttribute attribute) {
+    private static RegistryEntry<EntityAttribute> register(String name, EntityAttribute attribute) {
         REGISTRY.add(attribute);
-        return Registry.register(Registries.ATTRIBUTE, Unicopia.id(name), attribute);
+        return Registry.registerReference(Registries.ATTRIBUTE, Unicopia.id(name), attribute);
     }
 
     static void bootstrap() {}

src/main/java/com/minelittlepony/unicopia/entity/player/Acrobatics.java

@@ -17,6 +17,7 @@ import net.minecraft.block.Blocks;
 import net.minecraft.block.SideShapeType;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.nbt.NbtCompound;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.registry.tag.BlockTags;
 import net.minecraft.sound.SoundCategory;
 import net.minecraft.sound.SoundEvents;
@@ -161,7 +162,7 @@ public class Acrobatics implements Tickable, NbtSerialisable {
     public void startHanging(BlockPos pos) {
         boolean inverted = pony.getPhysics().isGravityNegative();
         hangingPos.set(Optional.of(pos));
-        entity.teleport(pos.getX() + 0.5, pos.getY() - (inverted ? 0 : 1), pos.getZ() + 0.5);
+        entity.setPosition(pos.getX() + 0.5, pos.getY() - (inverted ? 0 : 1), pos.getZ() + 0.5);
         entity.setVelocity(Vec3d.ZERO);
         entity.setSneaking(false);
         entity.stopFallFlying();
@@ -196,14 +197,14 @@ public class Acrobatics implements Tickable, NbtSerialisable {
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
         compound.putInt("ticksHanging", ticksHanging);
-        BLOCK_POS.writeOptional("hangingPosition", compound, getHangingPosition());
+        BLOCK_POS.writeOptional("hangingPosition", compound, getHangingPosition(), lookup);
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
         ticksHanging = compound.getInt("ticksHanging");
-        hangingPos.set(NbtSerialisable.BLOCK_POS.readOptional("hangingPosition", compound));
+        hangingPos.set(NbtSerialisable.BLOCK_POS.readOptional("hangingPosition", compound, lookup));
     }
 }

src/main/java/com/minelittlepony/unicopia/entity/player/ManaContainer.java

@@ -9,6 +9,7 @@ import com.minelittlepony.unicopia.util.Copyable;
 import com.minelittlepony.unicopia.util.NbtSerialisable;
 import com.minelittlepony.unicopia.util.Tickable;
 import net.minecraft.nbt.NbtCompound;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.util.math.MathHelper;
 
 class ManaContainer implements MagicReserves, Tickable, NbtSerialisable, Copyable<ManaContainer> {
@@ -44,13 +45,13 @@ class ManaContainer implements MagicReserves, Tickable, NbtSerialisable, Copyabl
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
-        bars.forEach((key, bar) -> compound.put(key, bar.toNBT()));
+        bars.forEach((key, bar) -> compound.put(key, bar.toNBT(lookup)));
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
-        bars.forEach((key, bar) -> bar.fromNBT(compound.getCompound(key)));
+        bars.forEach((key, bar) -> bar.fromNBT(compound.getCompound(key), lookup));
     }
 
     @Override
@@ -227,13 +228,13 @@ class ManaContainer implements MagicReserves, Tickable, NbtSerialisable, Copyabl
         }
 
         @Override
-        public void toNBT(NbtCompound compound) {
+        public void toNBT(NbtCompound compound, WrapperLookup lookup) {
             compound.putFloat("shadow", trailingValue);
             compound.putFloat("value", get());
         }
 
         @Override
-        public void fromNBT(NbtCompound compound) {
+        public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
             trailingValue = compound.getFloat("shadow");
             load(compound.getFloat("value"));
         }

src/main/java/com/minelittlepony/unicopia/entity/player/PlayerAttributes.java

@@ -1,10 +1,10 @@
 package com.minelittlepony.unicopia.entity.player;
 
 import java.util.List;
-import java.util.UUID;
 import java.util.function.Predicate;
 
 import com.minelittlepony.unicopia.Race;
+import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.ability.magic.spell.effect.SpellType;
 import com.minelittlepony.unicopia.entity.effect.EffectUtils;
 import com.minelittlepony.unicopia.entity.effect.UEffects;
@@ -12,58 +12,59 @@ import com.minelittlepony.unicopia.entity.mob.UEntityAttributes;
 import com.minelittlepony.unicopia.util.Tickable;
 
 import net.minecraft.entity.attribute.EntityAttribute;
-import net.minecraft.entity.attribute.EntityAttributeInstance;
 import net.minecraft.entity.attribute.EntityAttributeModifier;
 import net.minecraft.entity.attribute.EntityAttributeModifier.Operation;
 import net.minecraft.entity.attribute.EntityAttributes;
+import net.minecraft.registry.entry.RegistryEntry;
+import net.minecraft.util.Identifier;
 
 public class PlayerAttributes implements Tickable {
     private final static List<ToggleableAttribute> ATTRIBUTES = List.of(
             new ToggleableAttribute(
-                    new EntityAttributeModifier(UUID.fromString("777a5505-521e-480b-b9d5-6ea54f259564"), "Earth Pony Strength", 0.6, Operation.MULTIPLY_TOTAL),
+                    new EntityAttributeModifier(Unicopia.id("earth_pony_strength"), 0.6, Operation.ADD_MULTIPLIED_TOTAL),
                     List.of(EntityAttributes.GENERIC_ATTACK_DAMAGE, EntityAttributes.GENERIC_KNOCKBACK_RESISTANCE),
                     pony -> pony.getCompositeRace().canUseEarth()
             ),
             new ToggleableAttribute(
-                    new EntityAttributeModifier(UUID.fromString("79e269a8-03e8-b9d5-5853-e25fdcf6706d"), "Earth Pony Knockback Resistance", 6, Operation.ADDITION),
+                    new EntityAttributeModifier(Unicopia.id("earth_pony_knockback_resistance"), 6, Operation.ADD_VALUE),
                     List.of(EntityAttributes.GENERIC_KNOCKBACK_RESISTANCE),
                     pony -> pony.getCompositeRace().canUseEarth() && pony.asEntity().isSneaking()
             ),
             new ToggleableAttribute(
-                    new EntityAttributeModifier(UUID.fromString("9fc9e269-152e-0b48-9bd5-564a546e59f2"), "Earth Pony Mining Speed", 0.5, Operation.MULTIPLY_TOTAL),
+                    new EntityAttributeModifier(Unicopia.id("earth_pony_mining_speed"), 0.5, Operation.ADD_MULTIPLIED_TOTAL),
                     List.of(UEntityAttributes.EXTRA_MINING_SPEED),
                     pony -> pony.getCompositeRace().canUseEarth()
             ),
 
             new ToggleableAttribute(
-                    new EntityAttributeModifier(UUID.fromString("9e2699fc-3b8d-4f71-9d2d-fb92ee19b4f7"), "Pegasus Speed", 0.2, Operation.MULTIPLY_TOTAL),
+                    new EntityAttributeModifier(Unicopia.id("pegasus_speed"), 0.2, Operation.ADD_MULTIPLIED_TOTAL),
                     List.of(EntityAttributes.GENERIC_MOVEMENT_SPEED, EntityAttributes.GENERIC_ATTACK_SPEED),
                     pony -> pony.getCompositeRace().canFly() && !pony.getCompositeRace().includes(Race.HIPPOGRIFF)
             ),
             new ToggleableAttribute(
-                    new EntityAttributeModifier(UUID.fromString("707b50a8-03e8-40f4-8553-ecf67025fd6d"), "Pegasus Reach", 1.5, Operation.ADDITION),
+                    new EntityAttributeModifier(Unicopia.id("pegasus_reach"), 1.5, Operation.ADD_VALUE),
                     List.of(UEntityAttributes.EXTENDED_REACH_DISTANCE),
                     pony -> pony.getCompositeRace().canFly() && !pony.getCompositeRace().includes(Race.HIPPOGRIFF)
             ),
 
             new ToggleableAttribute(
-                    new EntityAttributeModifier(UUID.fromString("9e2699fc-3b8d-4f71-92dd-bef19b92e4f7"), "Hippogriff Speed", 0.1, Operation.MULTIPLY_TOTAL),
+                    new EntityAttributeModifier(Unicopia.id("hippogriff_speed"), 0.1, Operation.ADD_MULTIPLIED_TOTAL),
                     List.of(EntityAttributes.GENERIC_MOVEMENT_SPEED, EntityAttributes.GENERIC_ATTACK_SPEED),
                     pony -> pony.getCompositeRace().includes(Race.HIPPOGRIFF)
             ),
             new ToggleableAttribute(
-                    new EntityAttributeModifier(UUID.fromString("707b50a8-03e8-40f4-5853-fc7e0f625d6d"), "Hippogriff Reach", 1.3, Operation.ADDITION),
+                    new EntityAttributeModifier(Unicopia.id("hippogriff_reach"), 1.3, Operation.ADD_VALUE),
                     List.of(UEntityAttributes.EXTENDED_REACH_DISTANCE),
                     pony -> pony.getCompositeRace().includes(Race.HIPPOGRIFF)
             ),
 
             new ToggleableAttribute(
-                    new EntityAttributeModifier(UUID.fromString("79e269a8-03e8-b9d5-5853-e25fdcf6706e"), "Kirin Knockback Vulnerability", -2, Operation.ADDITION),
+                    new EntityAttributeModifier(Unicopia.id("kirin_knockback_vulneravility"), -2, Operation.ADD_VALUE),
                     List.of(EntityAttributes.GENERIC_KNOCKBACK_RESISTANCE),
                     pony -> pony.getCompositeRace().includes(Race.KIRIN)
             ),
             new ToggleableAttribute(
-                    new EntityAttributeModifier(UUID.fromString("4991fde9-c685-4930-bbd2-d7a228728bfe"), "Kirin Rage Speed", 0.7, Operation.MULTIPLY_TOTAL),
+                    new EntityAttributeModifier(Unicopia.id("kirin_rage"), 0.7, Operation.ADD_MULTIPLIED_TOTAL),
                     List.of(EntityAttributes.GENERIC_MOVEMENT_SPEED,
                             EntityAttributes.GENERIC_ATTACK_SPEED,
                             EntityAttributes.GENERIC_ATTACK_DAMAGE,
@@ -74,10 +75,10 @@ public class PlayerAttributes implements Tickable {
             )
     );
 
-    public static final UUID HEALTH_SWAPPING_MODIFIER_ID = UUID.fromString("7b93803e-4b25-11ed-951e-00155d43e0a2");
+    public static final Identifier HEALTH_SWAPPING_MODIFIER_ID = Unicopia.id("health_swap");
 
     public static EntityAttributeModifier healthChange(float addition) {
-        return new EntityAttributeModifier(HEALTH_SWAPPING_MODIFIER_ID, "Health Swap", addition, Operation.ADDITION);
+        return new EntityAttributeModifier(HEALTH_SWAPPING_MODIFIER_ID, addition, Operation.ADD_VALUE);
     }
 
     private final Pony pony;
@@ -92,20 +93,10 @@ public class PlayerAttributes implements Tickable {
         EffectUtils.applyStatusEffect(pony.asEntity(), UEffects.FORTIFICATION, pony.getCompositeRace().canUseEarth() && pony.asEntity().isSneaking());
     }
 
-    record ToggleableAttribute(EntityAttributeModifier modifier, List<EntityAttribute> attributes, Predicate<Pony> test) {
+    record ToggleableAttribute(EntityAttributeModifier modifier, List<RegistryEntry<EntityAttribute>> attributes, Predicate<Pony> test) {
         public void update(Pony pony) {
             boolean enable = test.test(pony);
-            attributes.forEach(attribute -> {
+            attributes.forEach(attribute -> pony.applyAttributeModifier(attribute, modifier, true, enable));
-                EntityAttributeInstance instance = pony.asEntity().getAttributeInstance(attribute);
-
-                if (enable) {
-                    if (!instance.hasModifier(modifier)) {
-                        instance.addPersistentModifier(modifier);
-                    }
-                } else {
-                    instance.removeModifier(modifier.getId());
-                }
-            });
         }
     }
 }

src/main/java/com/minelittlepony/unicopia/entity/player/PlayerCharmTracker.java

@@ -13,6 +13,7 @@ import com.minelittlepony.unicopia.util.NbtSerialisable;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.nbt.NbtElement;
 import net.minecraft.nbt.NbtList;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
 import net.minecraft.util.Hand;
 import net.minecraft.util.TypedActionResult;
 
@@ -71,7 +72,7 @@ public class PlayerCharmTracker implements NbtSerialisable, Copyable<PlayerCharm
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
         NbtList equippedSpells = new NbtList();
         for (CustomisedSpellType<?> spell : handSpells) {
             equippedSpells.add(spell.toNbt(new NbtCompound()));
@@ -80,7 +81,7 @@ public class PlayerCharmTracker implements NbtSerialisable, Copyable<PlayerCharm
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
         if (compound.contains("handSpells", NbtElement.LIST_TYPE)) {
             NbtList list = compound.getList("handSpells", NbtElement.COMPOUND_TYPE);
             for (int i = 0; i < handSpells.length && i < list.size(); i++) {

src/main/java/com/minelittlepony/unicopia/entity/player/PlayerPhysics.java

@@ -47,6 +47,9 @@ import net.minecraft.nbt.NbtCompound;
 import net.minecraft.particle.ParticleTypes;
 import net.minecraft.predicate.entity.EntityPredicates;
 import net.minecraft.registry.RegistryKeys;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.server.world.ServerWorld;
 import net.minecraft.sound.SoundCategory;
 import net.minecraft.sound.SoundEvent;
 import net.minecraft.util.math.*;
@@ -521,7 +524,7 @@ public class PlayerPhysics extends EntityPhysics<PlayerEntity> implements Tickab
             ChargeableItem.consumeEnergy(stack.stack(), energyConsumed);
 
             if (entity.getWorld().random.nextInt(damageInterval) == 0) {
-                stack.stack().damage(minDamage + entity.getWorld().random.nextInt(50), (LivingEntity)entity, stack.breakStatusSender());
+                stack.stack().damage(minDamage + entity.getWorld().random.nextInt(50), (ServerWorld)entity.getWorld(), (ServerPlayerEntity)entity, stack.breakStatusSender());
             }
 
             if (!lastFlightType.canFly()) {
@@ -871,8 +874,8 @@ public class PlayerPhysics extends EntityPhysics<PlayerEntity> implements Tickab
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.toNBT(compound);
+        super.toNBT(compound, lookup);
         compound.putBoolean("isFlying", isFlyingSurvival);
         compound.putBoolean("isCancelled", isCancelled);
         compound.putBoolean("isFlyingEither", isFlyingEither);
@@ -882,8 +885,8 @@ public class PlayerPhysics extends EntityPhysics<PlayerEntity> implements Tickab
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
-        super.fromNBT(compound);
+        super.fromNBT(compound, lookup);
         isFlyingSurvival = compound.getBoolean("isFlying");
         isCancelled = compound.getBoolean("isCancelled");
         isFlyingEither = compound.getBoolean("isFlyingEither");

src/main/java/com/minelittlepony/unicopia/entity/player/Pony.java

@@ -42,6 +42,8 @@ import com.google.common.collect.Streams;
 import com.minelittlepony.common.util.animation.Interpolator;
 import com.mojang.authlib.GameProfile;
 
+import net.minecraft.component.DataComponentTypes;
+import net.minecraft.component.type.PotionContentsComponent;
 import net.minecraft.enchantment.Enchantment;
 import net.minecraft.enchantment.Enchantments;
 import net.minecraft.entity.*;
@@ -55,8 +57,8 @@ import net.minecraft.entity.player.PlayerInventory;
 import net.minecraft.item.ItemStack;
 import net.minecraft.nbt.NbtCompound;
 import net.minecraft.particle.ParticleTypes;
-import net.minecraft.potion.PotionUtil;
+import net.minecraft.registry.RegistryWrapper.WrapperLookup;
-import net.minecraft.potion.Potions;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.registry.tag.DamageTypeTags;
 import net.minecraft.registry.tag.FluidTags;
 import net.minecraft.server.network.ServerPlayerEntity;
@@ -650,13 +652,13 @@ public class Pony extends Living<PlayerEntity> implements Copyable<Pony>, Update
         return false;
     }
 
-    public int getImplicitEnchantmentLevel(Enchantment enchantment, int initial) {
+    public int getImplicitEnchantmentLevel(RegistryEntry<Enchantment> enchantment, int initial) {
 
         if ((enchantment == Enchantments.AQUA_AFFINITY
                 || enchantment == Enchantments.DEPTH_STRIDER
                 || enchantment == Enchantments.LUCK_OF_THE_SEA
                 || enchantment == Enchantments.LURE) && getCompositeRace().includes(Race.SEAPONY)) {
-            return MathHelper.clamp(initial + 3, enchantment.getMinLevel(), enchantment.getMaxLevel());
+            return MathHelper.clamp(initial + 3, enchantment.value().getMinLevel(), enchantment.value().getMaxLevel());
         }
 
         return initial;
@@ -742,7 +744,7 @@ public class Pony extends Living<PlayerEntity> implements Copyable<Pony>, Update
         }
 
         if (getObservedSpecies() == Race.KIRIN
-                && (stack.isIn(UTags.Items.COOLS_OFF_KIRINS) || PotionUtil.getPotion(stack) == Potions.WATER)) {
+                && (stack.isIn(UTags.Items.COOLS_OFF_KIRINS) || stack.get(DataComponentTypes.POTION_CONTENTS) == PotionContentsComponent.DEFAULT)) {
             getMagicalReserves().getCharge().multiply(0.5F);
             getSpellSlot().get(SpellType.RAGE).ifPresent(RageAbilitySpell::setExtenguishing);
         }
@@ -824,34 +826,34 @@ public class Pony extends Living<PlayerEntity> implements Copyable<Pony>, Update
     }
 
     @Override
-    public void toNBT(NbtCompound compound) {
+    public void toNBT(NbtCompound compound, WrapperLookup lookup) {
-        compound.put("mana", mana.toNBT());
+        compound.put("mana", mana.toNBT(lookup));
         compound.putInt("levels", levels.get());
         compound.putInt("corruption", corruption.get());
-        super.toNBT(compound);
+        super.toNBT(compound, lookup);
     }
 
     @Override
-    public void fromNBT(NbtCompound compound) {
+    public void fromNBT(NbtCompound compound, WrapperLookup lookup) {
         levels.set(compound.getInt("levels"));
         corruption.set(compound.getInt("corruption"));
-        mana.fromNBT(compound.getCompound("mana"));
+        mana.fromNBT(compound.getCompound("mana"), lookup);
-        super.fromNBT(compound);
+        super.fromNBT(compound, lookup);
     }
 
     @Override
-    public void toSyncronisedNbt(NbtCompound compound) {
+    public void toSyncronisedNbt(NbtCompound compound, WrapperLookup lookup) {
-        super.toSyncronisedNbt(compound);
+        super.toSyncronisedNbt(compound, lookup);
         compound.putString("playerSpecies", Race.REGISTRY.getId(getSpecies()).toString());
         compound.putString("suppressedSpecies", Race.REGISTRY.getId(getSuppressedRace()).toString());
         compound.putFloat("magicExhaustion", magicExhaustion);
         compound.putInt("ticksInSun", ticksInSun);
         compound.putBoolean("hasShades", hasShades);
-        compound.put("acrobatics", acrobatics.toNBT());
+        compound.put("acrobatics", acrobatics.toNBT(lookup));
-        compound.put("powers", powers.toNBT());
+        compound.put("powers", powers.toNBT(lookup));
-        compound.put("gravity", gravity.toNBT());
+        compound.put("gravity", gravity.toNBT(lookup));
-        compound.put("charms", charms.toNBT());
+        compound.put("charms", charms.toNBT(lookup));
-        compound.put("discoveries", discoveries.toNBT());
+        compound.put("discoveries", discoveries.toNBT(lookup));
         compound.putInt("ticksInvulnerable", ticksInvulnerable);
         compound.putInt("ticksMetamorphising", ticksMetamorphising);
         NbtCompound progress = new NbtCompound();
@@ -862,15 +864,15 @@ public class Pony extends Living<PlayerEntity> implements Copyable<Pony>, Update
     }
 
     @Override
-    public void fromSynchronizedNbt(NbtCompound compound) {
+    public void fromSynchronizedNbt(NbtCompound compound, WrapperLookup lookup) {
-        super.fromSynchronizedNbt(compound);
+        super.fromSynchronizedNbt(compound, lookup);
         setSpecies(Race.fromName(compound.getString("playerSpecies"), Race.HUMAN));
         setSuppressedRace(Race.fromName(compound.getString("suppressedSpecies"), Race.UNSET));
-        powers.fromNBT(compound.getCompound("powers"));
+        powers.fromNBT(compound.getCompound("powers"), lookup);
-        gravity.fromNBT(compound.getCompound("gravity"));
+        gravity.fromNBT(compound.getCompound("gravity"), lookup);
-        charms.fromNBT(compound.getCompound("charms"));
+        charms.fromNBT(compound.getCompound("charms"), lookup);
-        discoveries.fromNBT(compound.getCompound("discoveries"));
+        discoveries.fromNBT(compound.getCompound("discoveries"), lookup);
-        acrobatics.fromNBT(compound.getCompound("acrobatics"));
+        acrobatics.fromNBT(compound.getCompound("acrobatics"), lookup);
         magicExhaustion = compound.getFloat("magicExhaustion");
         ticksInvulnerable = compound.getInt("ticksInvulnerable");
         ticksInSun = compound.getInt("ticksInSun");

src/main/java/com/minelittlepony/unicopia/entity/player/dummy/DummyClientPlayerEntity.java

@@ -14,11 +14,11 @@ import net.minecraft.client.MinecraftClient;
 import net.minecraft.client.network.AbstractClientPlayerEntity;
 import net.minecraft.client.network.ClientPlayNetworkHandler;
 import net.minecraft.client.network.PlayerListEntry;
-import net.minecraft.client.render.entity.PlayerModelPart;
 import net.minecraft.client.world.ClientWorld;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EquipmentSlot;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.entity.player.PlayerModelPart;
 import net.minecraft.item.ItemStack;
 import net.minecraft.world.GameMode;
 

src/main/java/com/minelittlepony/unicopia/item/AlicornAmuletItem.java

@@ -8,6 +8,7 @@ import com.google.common.base.Predicates;
 import com.google.common.collect.ImmutableMultimap;
 import com.minelittlepony.unicopia.InteractionManager;
 import com.minelittlepony.unicopia.USounds;
+import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.block.UBlocks;
 import com.minelittlepony.unicopia.compat.trinkets.TrinketsDelegate;
 import com.minelittlepony.unicopia.entity.*;
@@ -28,9 +29,10 @@ import it.unimi.dsi.fastutil.objects.Object2FloatMaps;
 import it.unimi.dsi.fastutil.objects.Object2FloatOpenHashMap;
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
-import net.fabricmc.fabric.api.item.v1.FabricItemSettings;
 import net.minecraft.client.MinecraftClient;
-import net.minecraft.client.item.TooltipContext;
+import net.minecraft.component.DataComponentTypes;
+import net.minecraft.component.EnchantmentEffectComponentTypes;
+import net.minecraft.component.type.ItemEnchantmentsComponent;
 import net.minecraft.enchantment.EnchantmentHelper;
 import net.minecraft.enchantment.Enchantments;
 import net.minecraft.entity.*;
@@ -41,10 +43,14 @@ import net.minecraft.entity.decoration.ItemFrameEntity;
 import net.minecraft.entity.effect.StatusEffectInstance;
 import net.minecraft.entity.effect.StatusEffects;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.particle.ParticleEffect;
 import net.minecraft.particle.ParticleTypes;
 import net.minecraft.predicate.entity.EntityPredicates;
+import net.minecraft.registry.RegistryKeys;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.registry.tag.DamageTypeTags;
 import net.minecraft.server.world.ServerWorld;
 import net.minecraft.sound.SoundCategory;
@@ -58,8 +64,8 @@ import net.minecraft.world.World;
 import net.minecraft.world.World.ExplosionSourceType;
 
 public class AlicornAmuletItem extends AmuletItem implements ItemTracker.Trackable, ItemImpl.ClingyItem, ItemImpl.GroundTickCallback {
-    private static final UUID EFFECT_UUID = UUID.fromString("c0a870f5-99ef-4716-a23e-f320ee834b26");
+    private static final Identifier EFFECT_ID = Unicopia.id("alicorn_amulet_modifiers");
-    private static final Object2FloatMap<EntityAttribute> EFFECT_SCALES = Object2FloatMaps.unmodifiable(new Object2FloatOpenHashMap<>(Map.of(
+    private static final Object2FloatMap<RegistryEntry<EntityAttribute>> EFFECT_SCALES = Object2FloatMaps.unmodifiable(new Object2FloatOpenHashMap<>(Map.of(
             EntityAttributes.GENERIC_ATTACK_DAMAGE, 0.2F,
             EntityAttributes.GENERIC_ATTACK_KNOCKBACK, 0.05F,
             EntityAttributes.GENERIC_ATTACK_SPEED, 0.2F,
@@ -67,16 +73,16 @@ public class AlicornAmuletItem extends AmuletItem implements ItemTracker.Trackab
             EntityAttributes.GENERIC_ARMOR, 0.01F
     )));
     private static final Float2ObjectFunction<EntityAttributeModifier> EFFECT_FACTORY = v -> {
-        return new EntityAttributeModifier(EFFECT_UUID, "Alicorn Amulet Modifier", v, EntityAttributeModifier.Operation.ADDITION);
+        return new EntityAttributeModifier(EFFECT_ID, v, EntityAttributeModifier.Operation.ADD_VALUE);
     };
 
-    public AlicornAmuletItem(FabricItemSettings settings) {
+    public AlicornAmuletItem(Item.Settings settings) {
-        super(settings, 0, ImmutableMultimap.of());
+        super(settings, 0);
     }
 
     @Environment(EnvType.CLIENT)
     @Override
-    public void appendTooltip(ItemStack stack, @Nullable World world, List<Text> tooltip, TooltipContext tooltipContext) {
+    public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> tooltip, TooltipType type) {
         Pony iplayer = Pony.of(MinecraftClient.getInstance().player);
 
         if (iplayer != null) {
@@ -177,7 +183,7 @@ public class AlicornAmuletItem extends AmuletItem implements ItemTracker.Trackab
 
     public static void updateAttributes(Living<?> wearer, float effectScale) {
         EFFECT_SCALES.object2FloatEntrySet().forEach(entry -> {
-            wearer.updateAttributeModifier(EFFECT_UUID, entry.getKey(), entry.getFloatValue() * effectScale, EFFECT_FACTORY, false);
+            wearer.updateAttributeModifier(EFFECT_ID, entry.getKey(), entry.getFloatValue() * effectScale, EFFECT_FACTORY, false);
         });
     }
 
@@ -248,10 +254,10 @@ public class AlicornAmuletItem extends AmuletItem implements ItemTracker.Trackab
             // bind to the player after 3 days
             if (daysAttached >= 3 && !pony.asEntity().isCreative()) {
                 stack = living.getArmour().getEquippedStack(TrinketsDelegate.NECKLACE).stack();
-                if (stack.getItem() == this && !EnchantmentHelper.hasBindingCurse(stack)) {
+                if (stack.getItem() == this && !EnchantmentHelper.hasAnyEnchantmentsWith(stack, EnchantmentEffectComponentTypes.PREVENT_ARMOR_CHANGE)) {
                     pony.playSound(USounds.ITEM_ALICORN_AMULET_HALLUCINATION, 3, 1);
                     stack = stack.copy();
-                    stack.addEnchantment(Enchantments.BINDING_CURSE, 1);
+                    stack.addEnchantment(pony.entryFor(Enchantments.BINDING_CURSE), 1);
                     pony.getArmour().equipStack(TrinketsDelegate.NECKLACE, stack);
                 }
             }
@@ -330,7 +336,8 @@ public class AlicornAmuletItem extends AmuletItem implements ItemTracker.Trackab
 
         if ((entity.age / 1000) % 10 == 0 && entity.age % 50 == 0) {
             for (Entity target : VecHelper.findInRange(entity, entity.getWorld(), entity.getPos(), 10, EntityPredicates.EXCEPT_CREATIVE_OR_SPECTATOR)) {
-                for (ItemStack equipment : target.getItemsEquipped()) {
+                if (target instanceof LivingEntity l) {
+                    for (ItemStack equipment : l.getEquippedItems()) {
                         if (equipment.getItem() == UItems.GROGARS_BELL) {
                             ChargeableItem chargeable = (ChargeableItem)UItems.GROGARS_BELL;
                             if (chargeable.hasCharge(equipment)) {
@@ -344,4 +351,5 @@ public class AlicornAmuletItem extends AmuletItem implements ItemTracker.Trackab
                 }
             }
         }
+    }
 }

src/main/java/com/minelittlepony/unicopia/item/AmuletItem.java

@@ -2,49 +2,42 @@ package com.minelittlepony.unicopia.item;
 
 import java.util.List;
 import java.util.Optional;
-import java.util.UUID;
+import com.minelittlepony.unicopia.Unicopia;
-
-import org.jetbrains.annotations.Nullable;
-
-import com.google.common.collect.ImmutableMultimap;
-import com.google.common.collect.Multimap;
 import com.minelittlepony.unicopia.compat.trinkets.TrinketsDelegate;
 
-import net.fabricmc.fabric.api.item.v1.FabricItemSettings;
 import net.minecraft.client.MinecraftClient;
-import net.minecraft.client.item.TooltipContext;
+import net.minecraft.component.type.AttributeModifiersComponent;
 import net.minecraft.entity.EquipmentSlot;
 import net.minecraft.entity.LivingEntity;
-import net.minecraft.entity.attribute.EntityAttribute;
-import net.minecraft.entity.attribute.EntityAttributeModifier;
 import net.minecraft.item.ArmorMaterials;
+import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipType;
+import net.minecraft.registry.entry.RegistryEntry;
 import net.minecraft.sound.SoundEvent;
 import net.minecraft.text.MutableText;
 import net.minecraft.text.StringVisitable;
 import net.minecraft.text.Style;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
-import net.minecraft.world.World;
+import net.minecraft.util.Identifier;
 
 public class AmuletItem extends WearableItem implements ChargeableItem {
+    public static final Identifier AMULET_MODIFIERS_ID = Unicopia.id("amulet_modifiers");
 
     private final int maxEnergy;
 
-    private final ImmutableMultimap<EntityAttribute, EntityAttributeModifier> modifiers;
+    public AmuletItem(Item.Settings settings, int maxEnergy) {
-
-    public AmuletItem(FabricItemSettings settings, int maxEnergy) {
-        this(settings, maxEnergy, ImmutableMultimap.of());
-    }
-
-    public AmuletItem(FabricItemSettings settings, int maxEnergy, ImmutableMultimap<EntityAttribute, EntityAttributeModifier> modifiers) {
         super(settings);
         this.maxEnergy = maxEnergy;
-        this.modifiers = modifiers;
+    }
+
+    public AmuletItem(Item.Settings settings, int maxEnergy, AttributeModifiersComponent modifiers) {
+        this(settings.attributeModifiers(modifiers), maxEnergy);
     }
 
     @Override
-    public void appendTooltip(ItemStack stack, @Nullable World world, List<Text> list, TooltipContext tooltipContext) {
+    public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> list, TooltipType type) {
 
         for (StringVisitable line : MinecraftClient.getInstance().textRenderer.getTextHandler().wrapLines(
                 Text.translatable(getTranslationKey(stack) + ".lore"), 150, Style.EMPTY)) {
@@ -62,8 +55,8 @@ public class AmuletItem extends WearableItem implements ChargeableItem {
     }
 
     @Override
-    public SoundEvent getEquipSound() {
+    public RegistryEntry<SoundEvent> getEquipSound() {
-        return ArmorMaterials.IRON.getEquipSound();
+        return ArmorMaterials.IRON.value().equipSound();
     }
 
     @Override
@@ -76,11 +69,6 @@ public class AmuletItem extends WearableItem implements ChargeableItem {
         return !isChargable() || stack.hasEnchantments() || ChargeableItem.getEnergy(stack) > 0;
     }
 
-    @Override
-    public Multimap<EntityAttribute, EntityAttributeModifier> getAttributeModifiers(EquipmentSlot slot) {
-        return slot == EquipmentSlot.CHEST ? modifiers : ImmutableMultimap.of();
-    }
-
     public boolean isApplicable(ItemStack stack) {
         return stack.getItem() == this && (!isChargable() || ChargeableItem.getEnergy(stack) > 0);
     }
@@ -105,19 +93,4 @@ public class AmuletItem extends WearableItem implements ChargeableItem {
                 .findFirst()
                 .orElse(TrinketsDelegate.EquippedStack.EMPTY);
     }
-
-    public static class ModifiersBuilder {
-        private static final UUID SLOT_UUID = UUID.fromString("9F3D476D-C118-4544-8365-64846904B48E");
-
-        private final ImmutableMultimap.Builder<EntityAttribute, EntityAttributeModifier> modifiers = new ImmutableMultimap.Builder<>();
-
-        public ModifiersBuilder add(EntityAttribute attribute, double amount) {
-            modifiers.put(attribute, new EntityAttributeModifier(SLOT_UUID, "Armor modifier", amount, EntityAttributeModifier.Operation.ADDITION));
-            return this;
-        }
-
-        public ImmutableMultimap<EntityAttribute, EntityAttributeModifier> build() {
-            return modifiers.build();
-        }
-    }
 }

src/main/java/com/minelittlepony/unicopia/item/AppleItem.java

@@ -47,7 +47,7 @@ public class AppleItem {
             float bob = MathHelper.sin(((float)item.getAge() + 1) / 10F + entity.uniqueOffset) * 0.1F + 0.1F;
 
             for (int i = 0; i < 3; i++) {
-                entity.getWorld().addParticle(ParticleTypes.AMBIENT_ENTITY_EFFECT, entity.getX(), entity.getY() + bob, entity.getZ(),
+                entity.getWorld().addParticle(ParticleTypes.EFFECT, entity.getX(), entity.getY() + bob, entity.getZ(),
                         entity.getWorld().random.nextGaussian() - 0.5F,
                         entity.getWorld().random.nextGaussian() - 0.5F,
                         entity.getWorld().random.nextGaussian() - 0.5F);

src/main/java/com/minelittlepony/unicopia/item/BaitedFishingRodItem.java

@@ -6,6 +6,7 @@ import net.minecraft.entity.projectile.FishingBobberEntity;
 import net.minecraft.item.FishingRodItem;
 import net.minecraft.item.ItemStack;
 import net.minecraft.item.Items;
+import net.minecraft.server.world.ServerWorld;
 import net.minecraft.util.Hand;
 import net.minecraft.util.TypedActionResult;
 import net.minecraft.world.World;
@@ -23,16 +24,13 @@ public class BaitedFishingRodItem extends FishingRodItem {
             if (user.fishHook != null) {
                 user.fishHook.discard();
                 ItemStack stack = user.getStackInHand(hand);
-                int lure = (EnchantmentHelper.getLure(stack) + 1) * 2;
+                int lure = (int)((EnchantmentHelper.getFishingTimeReduction((ServerWorld)world, stack, user) + 1) * 20F);
-                int luck = (EnchantmentHelper.getLuckOfTheSea(stack) + 1) * 2;
+                int luck = (EnchantmentHelper.getFishingLuckBonus((ServerWorld)world, stack, user) + 1) * 2;
                 world.spawnEntity(new FishingBobberEntity(user, world, luck, lure));
             }
 
             if (result.getValue().isOf(this)) {
-                ItemStack stack = Items.FISHING_ROD.getDefaultStack();
+                ItemStack stack = result.getValue().withItem(Items.FISHING_ROD);
-                if (result.getValue().hasNbt()) {
-                    stack.setNbt(result.getValue().getNbt().copy());
-                }
                 return TypedActionResult.success(stack, world.isClient());
             }
         }

src/main/java/com/minelittlepony/unicopia/item/BedsheetsItem.java

@@ -42,7 +42,7 @@ public class BedsheetsItem extends Item {
             FancyBedBlock.setBedPattern(world, context.getBlockPos(), pattern);
             context.getStack().decrement(1);
             PlayerEntity player = context.getPlayer();
-            world.playSound(player, pos, SoundEvents.ITEM_ARMOR_EQUIP_GENERIC, SoundCategory.BLOCKS, 1, 1);
+            world.playSound(player, pos, SoundEvents.ITEM_ARMOR_EQUIP_GENERIC.value(), SoundCategory.BLOCKS, 1, 1);
 
             return ActionResult.success(world.isClient);
         }

src/main/java/com/minelittlepony/unicopia/item/BellItem.java

@@ -1,8 +1,6 @@
 package com.minelittlepony.unicopia.item;
 
 import java.util.List;
-import org.jetbrains.annotations.Nullable;
-
 import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.entity.Creature;
@@ -15,7 +13,6 @@ import com.minelittlepony.unicopia.particle.UParticles;
 import com.minelittlepony.unicopia.util.VecHelper;
 import com.minelittlepony.unicopia.util.shape.Sphere;
 
-import net.minecraft.client.item.TooltipContext;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.mob.CreeperEntity;
 import net.minecraft.entity.mob.IllagerEntity;
@@ -23,6 +20,7 @@ import net.minecraft.entity.mob.MobEntity;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.particle.ParticleEffect;
 import net.minecraft.particle.ParticleTypes;
 import net.minecraft.text.Text;
@@ -44,12 +42,12 @@ public class BellItem extends Item implements ChargeableItem {
     }
 
     @Override
-    public void appendTooltip(ItemStack stack, @Nullable World world, List<Text> list, TooltipContext tooltipContext) {
+    public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> list, TooltipType type) {
         list.add(Text.translatable(getTranslationKey() + ".charges", (int)Math.floor(ChargeableItem.getEnergy(stack)), getMaxCharge()));
     }
 
     @Override
-    public int getMaxUseTime(ItemStack stack) {
+    public int getMaxUseTime(ItemStack stack, LivingEntity user) {
         return 3000;
     }
 
@@ -109,7 +107,7 @@ public class BellItem extends Item implements ChargeableItem {
 
         Living.getOrEmpty(userEntity).ifPresent(user -> {
             user.getTarget().ifPresent(living -> {
-                float maxUseTime = getMaxUseTime(stack);
+                float maxUseTime = getMaxUseTime(stack, userEntity);
                 float progress = (maxUseTime - remainingUseTicks) / maxUseTime;
 
                 if (tickDraining(user, living, stack, progress)) {

src/main/java/com/minelittlepony/unicopia/item/ButterflyItem.java

@@ -2,21 +2,15 @@ package com.minelittlepony.unicopia.item;
 
 import java.util.Arrays;
 import java.util.List;
-import java.util.Locale;
-
-import org.jetbrains.annotations.Nullable;
-
 import com.minelittlepony.unicopia.entity.mob.ButterflyEntity;
+import com.minelittlepony.unicopia.item.component.UDataComponentTypes;
 import com.minelittlepony.unicopia.item.group.MultiItem;
 
-import net.minecraft.client.item.TooltipContext;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
-import net.minecraft.nbt.NbtCompound;
+import net.minecraft.item.tooltip.TooltipType;
-import net.minecraft.nbt.NbtElement;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
-import net.minecraft.world.World;
 
 public class ButterflyItem extends Item implements MultiItem {
 
@@ -30,22 +24,17 @@ public class ButterflyItem extends Item implements MultiItem {
     }
 
     @Override
-    public void appendTooltip(ItemStack stack, @Nullable World world, List<Text> tooltip, TooltipContext context) {
+    public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> tooltip, TooltipType type) {
         tooltip.add(Text.literal(getVariant(stack).name()).formatted(Formatting.LIGHT_PURPLE));
     }
 
     public static ButterflyEntity.Variant getVariant(ItemStack stack) {
-        NbtCompound nbt = stack.getNbt();
+        return stack.getOrDefault(UDataComponentTypes.BUTTERFLY_VARIANT, ButterflyEntity.Variant.BUTTERFLY);
-        if (nbt == null || !nbt.contains("variant", NbtElement.STRING_TYPE)) {
-            return ButterflyEntity.Variant.BUTTERFLY;
-        }
-        String variant = nbt.getString("variant");
-        return ButterflyEntity.Variant.byName(variant);
     }
 
     public static ItemStack setVariant(ItemStack stack, ButterflyEntity.Variant variant) {
         if (stack.isOf(UItems.BUTTERFLY)) {
-            stack.getOrCreateNbt().putString("variant", variant.name().toLowerCase(Locale.ROOT));
+            stack.set(UDataComponentTypes.BUTTERFLY_VARIANT, variant);
         }
         return stack;
     }

src/main/java/com/minelittlepony/unicopia/item/CrystalHeartItem.java

@@ -52,13 +52,7 @@ public class CrystalHeartItem extends Item implements FloatingArtefactEntity.Art
 
     private static ItemStack fill(ItemStack stack) {
         Item item = ITEM_MAP.get().getOrDefault(stack.getItem(), stack.getItem());
-        if (item == stack.getItem()) {
+        return item == stack.getItem() ? stack : stack.withItem(item);
-            return stack;
-        }
-        ItemStack newStack = item.getDefaultStack();
-        newStack.setNbt(stack.getNbt());
-        newStack.setCount(stack.getCount());
-        return newStack;
     }
 
     public CrystalHeartItem(Settings settings) {

src/main/java/com/minelittlepony/unicopia/item/CuringJokeItem.java

@@ -75,7 +75,7 @@ public class CuringJokeItem extends BlockItem {
 
     static boolean removeEffect(LivingEntity user) {
         return user.getStatusEffects().stream().filter(effect -> {
-            return !effect.getEffectType().isBeneficial();
+            return !effect.getEffectType().value().isBeneficial();
         }).findAny().filter(effect -> {
             user.removeStatusEffect(effect.getEffectType());
             return true;
@@ -114,6 +114,6 @@ public class CuringJokeItem extends BlockItem {
             return InventoryUtil.stream(owner.getInventory());
         }
 
-        return StreamSupport.stream(entity.getItemsEquipped().spliterator(), false);
+        return StreamSupport.stream(entity.getEquippedItems().spliterator(), false);
     }
 }

src/main/java/com/minelittlepony/unicopia/item/DragonBreathScrollItem.java

@@ -1,12 +1,11 @@
 package com.minelittlepony.unicopia.item;
 
-import java.util.UUID;
-
 import com.minelittlepony.unicopia.USounds;
 import com.minelittlepony.unicopia.advancement.UCriteria;
 import com.minelittlepony.unicopia.server.world.DragonBreathStore;
 import com.minelittlepony.unicopia.server.world.UnicopiaWorldProperties;
 
+import net.minecraft.component.DataComponentTypes;
 import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
@@ -27,13 +26,13 @@ public class DragonBreathScrollItem extends Item {
         ItemStack stack = player.getStackInHand(hand);
         ItemStack payload = player.getStackInHand(hand == Hand.MAIN_HAND ? Hand.OFF_HAND : Hand.MAIN_HAND);
 
-        if (payload.isEmpty() || !stack.hasCustomName()) {
+        if (payload.isEmpty() || !stack.contains(DataComponentTypes.CUSTOM_NAME)) {
             return TypedActionResult.fail(stack);
         }
 
         stack.split(1);
         if (!world.isClient) {
-            String recipient = stack.getName().getString();
+            String recipient = stack.get(DataComponentTypes.CUSTOM_NAME).getString();
             UCriteria.SEND_DRAGON_BREATH.triggerSent(player, payload, recipient, (counterName, count) -> {
                if (count == 1 && "dings_on_celestias_head".equals(counterName)) {
                    UnicopiaWorldProperties properties = UnicopiaWorldProperties.forWorld((ServerWorld)world);
@@ -46,9 +45,4 @@ public class DragonBreathScrollItem extends Item {
         player.playSound(USounds.ITEM_DRAGON_BREATH_SCROLL_USE, 1, 1);
         return TypedActionResult.consume(stack);
     }
-
-    public static ItemStack setRecipient(ItemStack stack, UUID recipient) {
-        stack.getOrCreateSubNbt("recipient").putUuid("id", recipient);
-        return stack;
-    }
 }

src/main/java/com/minelittlepony/unicopia/item/GlowableItem.java

@@ -1,15 +1,16 @@
 package com.minelittlepony.unicopia.item;
 
+import com.minelittlepony.unicopia.item.component.UDataComponentTypes;
+
 import net.minecraft.item.ItemStack;
-import net.minecraft.nbt.NbtCompound;
 
 public interface GlowableItem {
-    default boolean isGlowing(ItemStack stack) {
+    static boolean isGlowing(ItemStack stack) {
-        NbtCompound tag = stack.getSubNbt("display");
+        Boolean glowing = stack.get(UDataComponentTypes.GLOWING);
-        return tag != null && tag.getBoolean("glowing");
+        return glowing != null && glowing;
     }
 
-    default void setGlowing(ItemStack stack, boolean glowing) {
+    static void setGlowing(ItemStack stack, boolean glowing) {
-        stack.getOrCreateSubNbt("display").putBoolean("glowing", glowing);
+        stack.set(UDataComponentTypes.GLOWING, glowing);
     }
 }

src/main/java/com/minelittlepony/unicopia/item/HorseShoeItem.java

@@ -4,8 +4,6 @@ import java.util.List;
 
 import org.jetbrains.annotations.Nullable;
 
-import com.google.common.collect.ImmutableMultimap;
-import com.google.common.collect.Multimap;
 import com.minelittlepony.unicopia.InteractionManager;
 import com.minelittlepony.unicopia.Race;
 import com.minelittlepony.unicopia.USounds;
@@ -14,12 +12,13 @@ import com.minelittlepony.unicopia.entity.mob.UEntityAttributes;
 import com.minelittlepony.unicopia.entity.player.Pony;
 import com.minelittlepony.unicopia.projectile.PhysicsBodyProjectileEntity;
 
-import net.minecraft.client.item.TooltipContext;
+import net.minecraft.component.type.AttributeModifierSlot;
-import net.minecraft.entity.EquipmentSlot;
+import net.minecraft.component.type.AttributeModifiersComponent;
-import net.minecraft.entity.attribute.EntityAttribute;
 import net.minecraft.entity.attribute.EntityAttributeModifier;
 import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
+import net.minecraft.item.tooltip.TooltipType;
 import net.minecraft.sound.SoundEvent;
 import net.minecraft.text.Text;
 import net.minecraft.util.Formatting;
@@ -30,16 +29,14 @@ public class HorseShoeItem extends HeavyProjectileItem {
     private final float projectileInnacuracy;
     private final float baseProjectileSpeed;
 
-    private final Multimap<EntityAttribute, EntityAttributeModifier> attributeModifiers;
+    public HorseShoeItem(Item.Settings settings, float projectileDamage, float projectileInnacuracy, float baseProjectileSpeed) {
-
+        super(settings.attributeModifiers(AttributeModifiersComponent.builder().add(
-    public HorseShoeItem(Settings settings, float projectileDamage, float projectileInnacuracy, float baseProjectileSpeed) {
+            UEntityAttributes.EXTENDED_ATTACK_DISTANCE,
-        super(settings, projectileDamage);
+            new EntityAttributeModifier(PolearmItem.ATTACK_RANGE_MODIFIER_ID, -3F, EntityAttributeModifier.Operation.ADD_VALUE),
+            AttributeModifierSlot.MAINHAND
+    ).build()), projectileDamage);
         this.projectileInnacuracy = projectileInnacuracy;
         this.baseProjectileSpeed = baseProjectileSpeed;
-
-        ImmutableMultimap.Builder<EntityAttribute, EntityAttributeModifier> builder = ImmutableMultimap.builder();
-        builder.put(UEntityAttributes.EXTENDED_ATTACK_DISTANCE, new EntityAttributeModifier(PolearmItem.ATTACK_RANGE_MODIFIER_ID, "Weapon modifier", -3F, EntityAttributeModifier.Operation.ADDITION));
-        attributeModifiers = builder.build();
     }
 
     @Override
@@ -48,7 +45,7 @@ public class HorseShoeItem extends HeavyProjectileItem {
     }
 
     @Override
-    public void appendTooltip(ItemStack stack, @Nullable World world, List<Text> tooltip, TooltipContext context) {
+    public void appendTooltip(ItemStack stack, TooltipContext context, List<Text> tooltip, TooltipType type) {
         float degradation = (stack.getDamage() / (float)stack.getMaxDamage());
         float inaccuracy = projectileInnacuracy + degradation * 30;
         tooltip.add(Text.empty());
@@ -97,15 +94,6 @@ public class HorseShoeItem extends HeavyProjectileItem {
 
     @Override
     public SoundEvent getThrowSound(ItemStack stack) {
-        return USounds.Vanilla.ITEM_TRIDENT_THROW;
+        return USounds.Vanilla.ITEM_TRIDENT_THROW.value();
     }
-
-    @Override
-    public Multimap<EntityAttribute, EntityAttributeModifier> getAttributeModifiers(EquipmentSlot slot) {
-        if (slot == EquipmentSlot.MAINHAND) {
-            return attributeModifiers;
-        }
-        return super.getAttributeModifiers(slot);
-    }
-
 }

src/main/java/com/minelittlepony/unicopia/item/ItemDuck.java

@@ -2,14 +2,22 @@ package com.minelittlepony.unicopia.item;
 
 import java.util.Optional;
 
+import com.minelittlepony.unicopia.diet.DietView;
 import com.minelittlepony.unicopia.entity.ItemImpl;
+
+import net.minecraft.component.type.FoodComponent;
 import net.minecraft.item.*;
 
-public interface ItemDuck extends ItemConvertible, ItemImpl.TickableItem {
+public interface ItemDuck extends ItemConvertible, ItemImpl.TickableItem, DietView.Holder {
+    @Deprecated
     void setFoodComponent(FoodComponent food);
 
+    // TODO: Inject into Item.Settings::getComponents and return our own implementation of ComponentMap to handle food component overrides
+    // ItemStack(ComponentMapImpl(UnicopiaComponentMap(ItemComponentMap()), Changes))
+    @Deprecated
     Optional<FoodComponent> getOriginalFoodComponent();
 
+    @Deprecated
     default void resetFoodComponent() {
         setFoodComponent(getOriginalFoodComponent().orElse(null));
     }

src/main/java/com/minelittlepony/unicopia/item/PolearmItem.java

@@ -1,64 +1,43 @@
 package com.minelittlepony.unicopia.item;
 
-import java.util.UUID;
+import java.util.List;
-
-import com.google.common.collect.ImmutableMultimap;
-import com.google.common.collect.Multimap;
 import com.minelittlepony.unicopia.UTags;
+import com.minelittlepony.unicopia.Unicopia;
 import com.minelittlepony.unicopia.entity.Living;
 import com.minelittlepony.unicopia.entity.mob.UEntityAttributes;
-import com.minelittlepony.unicopia.item.enchantment.CustomEnchantableItem;
-
 import net.minecraft.block.*;
-import net.minecraft.enchantment.Enchantment;
+import net.minecraft.component.DataComponentTypes;
-import net.minecraft.enchantment.Enchantments;
+import net.minecraft.component.type.AttributeModifierSlot;
+import net.minecraft.component.type.ToolComponent;
 import net.minecraft.entity.EquipmentSlot;
 import net.minecraft.entity.LivingEntity;
 import net.minecraft.entity.attribute.*;
+import net.minecraft.entity.player.PlayerEntity;
 import net.minecraft.item.*;
+import net.minecraft.util.Identifier;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
 
-public class PolearmItem extends SwordItem implements CustomEnchantableItem {
+public class PolearmItem extends ToolItem {
-    static final UUID ATTACK_RANGE_MODIFIER_ID = UUID.fromString("A7B3659C-AA74-469C-963A-09A391DCAA0F");
+    static final Identifier ATTACK_RANGE_MODIFIER_ID = Unicopia.id("attack_reach_modifier");
-
-    private final Multimap<EntityAttribute, EntityAttributeModifier> attributeModifiers;
-
-    private final int attackRange;
 
     public PolearmItem(ToolMaterial material, int damage, float speed, int range, Settings settings) {
-        super(material, damage, speed, settings);
+        super(material, settings.attributeModifiers(SwordItem.createAttributeModifiers(material, damage, speed).with(
-        this.attackRange = range;
+                UEntityAttributes.EXTENDED_REACH_DISTANCE, new EntityAttributeModifier(ATTACK_RANGE_MODIFIER_ID, range, EntityAttributeModifier.Operation.ADD_VALUE), AttributeModifierSlot.MAINHAND
-        ImmutableMultimap.Builder<EntityAttribute, EntityAttributeModifier> builder = ImmutableMultimap.builder();
+        ).with(
-        builder.putAll(super.getAttributeModifiers(EquipmentSlot.MAINHAND));
+                UEntityAttributes.EXTENDED_ATTACK_DISTANCE, new EntityAttributeModifier(ATTACK_RANGE_MODIFIER_ID, range, EntityAttributeModifier.Operation.ADD_VALUE), AttributeModifierSlot.MAINHAND
-        builder.put(UEntityAttributes.EXTENDED_REACH_DISTANCE, new EntityAttributeModifier(ATTACK_RANGE_MODIFIER_ID, "Weapon modifier", attackRange, EntityAttributeModifier.Operation.ADDITION));
+        )).component(DataComponentTypes.TOOL, createToolComponent()));
-        builder.put(UEntityAttributes.EXTENDED_ATTACK_DISTANCE, new EntityAttributeModifier(ATTACK_RANGE_MODIFIER_ID, "Weapon modifier", attackRange, EntityAttributeModifier.Operation.ADDITION));
-        attributeModifiers = builder.build();
     }
 
-    @Override
+    private static ToolComponent createToolComponent() {
-    public float getMiningSpeedMultiplier(ItemStack stack, BlockState state) {
+        return new ToolComponent(
-        if (state.isOf(Blocks.COBWEB)) {
+            List.of(ToolComponent.Rule.ofAlwaysDropping(List.of(Blocks.COBWEB), 15.0F), ToolComponent.Rule.of(UTags.Blocks.POLEARM_MINEABLE, 1.5F)), 1.0F, 2
-            return 1;
+        );
-        }
-        return super.getMiningSpeedMultiplier(stack, state);
-    }
-
-    @Override
-    public boolean isSuitableFor(BlockState state) {
-        return state.isIn(UTags.Blocks.POLEARM_MINEABLE);
-    }
-
-    @Override
-    public Multimap<EntityAttribute, EntityAttributeModifier> getAttributeModifiers(EquipmentSlot slot) {
-        if (slot == EquipmentSlot.MAINHAND) {
-            return attributeModifiers;
-        }
-        return super.getAttributeModifiers(slot);
     }
 
     @Override
     public boolean postHit(ItemStack stack, LivingEntity target, LivingEntity attacker) {
         boolean tooNear = target.distanceTo(attacker) <= 2;
-        stack.damage(tooNear ? 4 : 1, attacker, e -> e.sendEquipmentBreakStatus(EquipmentSlot.MAINHAND));
         target.takeKnockback(0.15, attacker.getX() - target.getX(), attacker.getZ() - target.getZ());
         Living.updateVelocity(target);
         if (tooNear) {
@@ -70,7 +49,13 @@ public class PolearmItem extends SwordItem implements CustomEnchantableItem {
     }
 
     @Override
-    public boolean isAcceptableEnchant(ItemStack stack, Enchantment enchantment) {
+    public boolean canMine(BlockState state, World world, BlockPos pos, PlayerEntity miner) {
-        return enchantment != Enchantments.SWEEPING;
+        return !miner.isCreative();
+    }
+
+    @Override
+    public void postDamageEntity(ItemStack stack, LivingEntity target, LivingEntity attacker) {
+        boolean tooNear = target.distanceTo(attacker) <= 2;
+        stack.damage(tooNear ? 4 : 1, attacker, EquipmentSlot.MAINHAND);
     }
 }