diff --git a/sources/src/main/java/io/akarin/server/mixin/optimization/MixinEntity.java b/sources/src/main/java/io/akarin/server/mixin/optimization/MixinEntity.java
new file mode 100644
index 000000000..5c34c28a6
--- /dev/null
+++ b/sources/src/main/java/io/akarin/server/mixin/optimization/MixinEntity.java
@@ -0,0 +1,30 @@
+package io.akarin.server.mixin.optimization;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+import org.spongepowered.asm.mixin.Shadow;
+
+import net.minecraft.server.AxisAlignedBB;
+import net.minecraft.server.Entity;
+import net.minecraft.server.Material;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.server.World;
+
+@Mixin(value = Entity.class, remap = false)
+public abstract class MixinEntity {
+    @Shadow public World world;
+    @Shadow public abstract AxisAlignedBB getBoundingBox();
+    
+    private boolean isInLava;
+    private int lastLavaCheck = Integer.MIN_VALUE;
+    
+    @Overwrite // PAIL: isInLava
+    public boolean au() {
+        int currentTick = MinecraftServer.currentTick;
+        if (this.lastLavaCheck != currentTick) {
+            this.lastLavaCheck = currentTick;
+            this.isInLava = this.world.a(this.getBoundingBox().grow(-0.10000000149011612D, -0.4000000059604645D, -0.10000000149011612D), Material.LAVA);
+        }
+        return this.isInLava;
+    }
+}
\ No newline at end of file
diff --git a/sources/src/main/java/io/akarin/server/mixin/realtime/MixinEntity.java b/sources/src/main/java/io/akarin/server/mixin/realtime/MixinEntity.java
index 2cb7d7ba1..5f9ce0ea8 100644
--- a/sources/src/main/java/io/akarin/server/mixin/realtime/MixinEntity.java
+++ b/sources/src/main/java/io/akarin/server/mixin/realtime/MixinEntity.java
@@ -33,7 +33,7 @@ import io.akarin.api.internal.mixin.IMixinRealTimeTicking;
 import net.minecraft.server.Entity;
 import net.minecraft.server.World;
 
-@Mixin(value = Entity.class, remap = false)
+@Mixin(value = Entity.class, remap = false, priority = 1001)
 public abstract class MixinEntity {
     private static final String ENTITY_RIDABLE_COOLDOWN_FIELD = "Lnet/minecraft/entity/Entity;j:I"; // PUTFIELD: rideCooldown
     private static final String ENTITY_PORTAL_COUNTER_FIELD = "Lnet/minecraft/entity/Entity;al:I"; // PUTFIELD: portalCounter
diff --git a/sources/src/main/resources/mixins.akarin.core.json b/sources/src/main/resources/mixins.akarin.core.json
index cf428281e..4224d8e61 100644
--- a/sources/src/main/resources/mixins.akarin.core.json
+++ b/sources/src/main/resources/mixins.akarin.core.json
@@ -34,6 +34,7 @@
         "nsc.OptimisticNetworkManager",
         "nsc.NonblockingServerConnection",
         
+        "optimization.MixinEntity",
         "optimization.WeakBigTree",
         "optimization.WeakEnchantmentManager",
         "optimization.MixinEntityHorseAbstract",