src/main/java/systems/brn/tweaks/Tweaks.java

@@ -27,6 +27,9 @@ public class Tweaks implements ModInitializer {
     public static final GameRules.Key<GameRules.IntRule> ENDER_PEARL_DIVERGENCE =
             GameRuleRegistry.register("enderPearlDivergence", GameRules.Category.PLAYER, GameRuleFactory.createIntRule(100, 0, Integer.MAX_VALUE));
 
+    public static final GameRules.Key<GameRules.IntRule> ENDER_EYE_POP_CHANCE =
+            GameRuleRegistry.register("enderEyePopChance", GameRules.Category.PLAYER, GameRuleFactory.createIntRule(20, 0, 100));
+
     @Override
     public void onInitialize() {
     }

src/main/java/systems/brn/tweaks/mixin/EyeOfEnderMixin.java

@@ -0,0 +1,39 @@
+package systems.brn.tweaks.mixin;
+
+import net.minecraft.entity.EyeOfEnderEntity;
+import net.minecraft.server.world.ServerWorld;
+import net.minecraft.world.World;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+import systems.brn.tweaks.Tweaks;
+import systems.brn.tweaks.mixin.accessors.EyeOfEnderEntityAccessor;
+
+@Mixin(EyeOfEnderEntity.class)
+public class EyeOfEnderMixin {
+
+    @Inject(
+            method = "initTargetPos",
+            at = @At(
+                    value = "FIELD",
+                    target = "Lnet/minecraft/entity/EyeOfEnderEntity;dropsItem:Z",
+                    ordinal = 0,
+                    shift = At.Shift.AFTER
+            )
+    )
+    private void applyCustomBreakChance(CallbackInfo ci) {
+        EyeOfEnderEntity self = (EyeOfEnderEntity)(Object)this;
+        World world = self.getWorld();
+
+        if (!(world instanceof ServerWorld serverWorld))
+            return;
+
+        int popChance = serverWorld.getGameRules().getInt(Tweaks.ENDER_EYE_POP_CHANCE);
+        int roll = self.getRandom().nextInt(100);
+
+        boolean dropsItem = roll >= popChance;
+
+        ((EyeOfEnderEntityAccessor) self).setDropsItem(dropsItem);
+    }
+}

src/main/java/systems/brn/tweaks/mixin/accessors/EyeOfEnderEntityAccessor.java

@@ -0,0 +1,11 @@
+package systems.brn.tweaks.mixin.accessors;
+
+import net.minecraft.entity.EyeOfEnderEntity;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Accessor;
+
+@Mixin(EyeOfEnderEntity.class)
+public interface EyeOfEnderEntityAccessor {
+    @Accessor("dropsItem")
+    void setDropsItem(boolean value);
+}

src/main/resources/tweaks.mixins.json

@@ -7,9 +7,11 @@
     "CreeperEntityMixin",
     "DontHurtMePearlMixin",
     "EnderPearlItemMixin",
+    "EyeOfEnderMixin",
     "JustTeleportAlreadyMixin",
     "PlayerEntityMixin",
-    "accessors.CreeperEntityAccessor"
+    "accessors.CreeperEntityAccessor",
+    "accessors.EyeOfEnderEntityAccessor"
   ],
   "injectors": {
     "defaultRequire": 1