diff --git a/src/main/java/com/falsepattern/endlessids/mixin/helpers/stubpackage/com/emoniph/witchery/brewing/action/effect/BrewActionBiomeChange$ChunkCoord.java b/src/main/java/com/falsepattern/endlessids/mixin/helpers/stubpackage/com/emoniph/witchery/brewing/action/effect/BrewActionBiomeChange$ChunkCoord.java
new file mode 100644
index 0000000..636b6c8
--- /dev/null
+++ b/src/main/java/com/falsepattern/endlessids/mixin/helpers/stubpackage/com/emoniph/witchery/brewing/action/effect/BrewActionBiomeChange$ChunkCoord.java
@@ -0,0 +1,36 @@
+/*
+ * EndlessIDs
+ *
+ * Copyright (C) 2022-2025 FalsePattern, The MEGA Team
+ * All Rights Reserved
+ *
+ * The above copyright notice, this permission notice and the word "MEGA"
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, only version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.falsepattern.endlessids.mixin.helpers.stubpackage.com.emoniph.witchery.brewing.action.effect;
+
+import net.minecraft.world.World;
+import net.minecraft.world.chunk.Chunk;
+
+public class BrewActionBiomeChange$ChunkCoord {
+    public BrewActionBiomeChange$ChunkCoord(int x, int z) {
+
+    }
+
+    public Chunk getChunk(World world) {
+        return null;
+    }
+}
diff --git a/src/main/java/com/falsepattern/endlessids/mixin/mixins/common/biome/witchery/BrewActionBiomeChangeMixin.java b/src/main/java/com/falsepattern/endlessids/mixin/mixins/common/biome/witchery/BrewActionBiomeChangeMixin.java
new file mode 100644
index 0000000..d276d1e
--- /dev/null
+++ b/src/main/java/com/falsepattern/endlessids/mixin/mixins/common/biome/witchery/BrewActionBiomeChangeMixin.java
@@ -0,0 +1,96 @@
+/*
+ * EndlessIDs
+ *
+ * Copyright (C) 2022-2025 FalsePattern, The MEGA Team
+ * All Rights Reserved
+ *
+ * The above copyright notice, this permission notice and the word "MEGA"
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, only version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.falsepattern.endlessids.mixin.mixins.common.biome.witchery;
+
+import com.emoniph.witchery.brewing.action.effect.BrewActionBiomeChange;
+import com.falsepattern.endlessids.mixin.helpers.ChunkBiomeHook;
+import com.falsepattern.endlessids.mixin.helpers.stubpackage.com.emoniph.witchery.brewing.action.effect.BrewActionBiomeChange$ChunkCoord;
+import com.llamalad7.mixinextras.injector.wrapoperation.Operation;
+import com.llamalad7.mixinextras.injector.wrapoperation.WrapOperation;
+import com.llamalad7.mixinextras.sugar.Share;
+import com.llamalad7.mixinextras.sugar.ref.LocalRef;
+import lombok.val;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import net.minecraft.init.Blocks;
+import net.minecraft.world.World;
+import net.minecraft.world.biome.BiomeGenBase;
+import net.minecraft.world.chunk.Chunk;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+@Mixin(BrewActionBiomeChange.class)
+public abstract class BrewActionBiomeChangeMixin {
+    @WrapOperation(method = "changeBiome",
+                   at = @At(value = "INVOKE",
+                            target = "Ljava/util/Map$Entry;getValue()Ljava/lang/Object;"),
+                   remap = false,
+                   require = 1)
+    private Object removeByteArrayGet(Map.Entry instance, Operation<Object> original,
+                                      @Share("biomeArray") LocalRef<short[]> biome) {
+        biome.set((short[]) original.call(instance));
+        return null;
+    }
+
+    @Redirect(method = "changeBiome",
+              at = @At(value = "INVOKE",
+                       target = "Lnet/minecraft/world/chunk/Chunk;setBiomeArray([B)V"),
+              remap = false,
+              require = 1)
+    private void extendedSetBiomeArray(Chunk instance, byte[] ignored, @Share("biomeArray") LocalRef<short[]> biome) {
+        ((ChunkBiomeHook)instance).setBiomeShortArray(biome.get());
+    }
+
+    /**
+     * @author FalsePattern
+     * @reason Doing this with normal mixins would be extremely tedious because of the local variable shuffling.
+     * Nobody else's patches should be landing here anyway.
+     */
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    @Overwrite(remap = false)
+    private void drawLine(World world, int x1, int x2, int z, HashMap chunkMap, BiomeGenBase biome) {
+        for(int x = x1; x <= x2; ++x) {
+            BrewActionBiomeChange$ChunkCoord coord = new BrewActionBiomeChange$ChunkCoord(x >> 4, z >> 4);
+            short[] map = (short[])chunkMap.get(coord);
+            if (map == null) {
+                Chunk chunk = world.getChunkFromBlockCoords(x, z);
+                val sarr = ((ChunkBiomeHook) chunk).getBiomeShortArray();
+                map = Arrays.copyOf(sarr, sarr.length);
+                chunkMap.put(coord, map);
+            }
+
+            map[(z & 15) << 4 | x & 15] = (short) biome.biomeID;
+            if (biome.rainfall == 0.0F) {
+                int y = world.getTopSolidOrLiquidBlock(x, z);
+                if (world.getBlock(x, y, z) == Blocks.snow_layer) {
+                    world.setBlockToAir(x, y, z);
+                }
+            }
+        }
+    }
+}
diff --git a/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java b/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java
index a7cea19..5f5061f 100644
--- a/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java
+++ b/src/main/java/com/falsepattern/endlessids/mixin/plugin/Mixin.java
@@ -226,6 +226,7 @@ public enum Mixin implements IMixin {
     //endregion TwilightForest
     //region Witchery
     WitcheryWorldChunkManagerMirrorMixin(Side.COMMON, condition(() -> GeneralConfig.extendBiome).and(require(TargetedMod.WITCHERY)), "biome.witchery.WorldChunkManagerMirrorMixin"),
+    WitcheryBrewActionBiomeChangeMixin(Side.COMMON, condition(() -> GeneralConfig.extendBiome).and(require(TargetedMod.WITCHERY)), "biome.witchery.BrewActionBiomeChangeMixin"),
     //endregion Witchery
     //endregion biome
     //region blockitem