diff --git a/src/main/java/com/minelittlepony/unicopia/ability/magic/Caster.java b/src/main/java/com/minelittlepony/unicopia/ability/magic/Caster.java
index f757f030..e3dd13ee 100644
--- a/src/main/java/com/minelittlepony/unicopia/ability/magic/Caster.java
+++ b/src/main/java/com/minelittlepony/unicopia/ability/magic/Caster.java
@@ -65,6 +65,10 @@ public interface Caster<E extends Entity> extends
     default boolean canModifyAt(BlockPos pos, ModificationType mod) {
 
         if (mod.checkPhysical()) {
+            if (asWorld().getBlockState(pos).getHardness(asWorld(), pos) < 0) {
+                return false;
+            }
+
             if (getMaster() instanceof PlayerEntity player) {
                 if (!asWorld().canPlayerModifyAt(player, pos)) {
                     return false;
diff --git a/src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/CatapultSpell.java b/src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/CatapultSpell.java
index f00d9020..e67881f6 100644
--- a/src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/CatapultSpell.java
+++ b/src/main/java/com/minelittlepony/unicopia/ability/magic/spell/effect/CatapultSpell.java
@@ -12,6 +12,7 @@ import com.minelittlepony.unicopia.mixin.MixinFallingBlockEntity;
 import com.minelittlepony.unicopia.projectile.MagicProjectileEntity;
 import com.minelittlepony.unicopia.projectile.ProjectileDelegate;
 
+import net.minecraft.block.BlockState;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.FallingBlockEntity;
 import net.minecraft.util.hit.BlockHitResult;