diff --git a/src/generated/resources/.cache/f04eeeff5586946d40a4e5aa6e023601ec5a9e42 b/src/generated/resources/.cache/f04eeeff5586946d40a4e5aa6e023601ec5a9e42
index 84fbb2c..f3d48df 100644
--- a/src/generated/resources/.cache/f04eeeff5586946d40a4e5aa6e023601ec5a9e42
+++ b/src/generated/resources/.cache/f04eeeff5586946d40a4e5aa6e023601ec5a9e42
@@ -1,3 +1,5 @@
-// 1.21.1	2026-04-27T21:59:02.410419363	Tags for minecraft:block mod id processed_obsidian
+// 1.21.1	2026-05-17T17:20:30.791752129	Tags for minecraft:block mod id processed_obsidian
+5e56eed1632f39daf68f3edf106d7aca22610141 data/minecraft/tags/block/ancient_city_replaceable.json
 b574cbc55e404661251d88d773cd79cc2d344983 data/minecraft/tags/block/mineable/pickaxe.json
 b574cbc55e404661251d88d773cd79cc2d344983 data/minecraft/tags/block/needs_diamond_tool.json
+b574cbc55e404661251d88d773cd79cc2d344983 data/minecraft/tags/block/sculk_replaceable_world_gen.json
diff --git a/src/generated/resources/data/minecraft/tags/block/ancient_city_replaceable.json b/src/generated/resources/data/minecraft/tags/block/ancient_city_replaceable.json
new file mode 100644
index 0000000..90fbfe8
--- /dev/null
+++ b/src/generated/resources/data/minecraft/tags/block/ancient_city_replaceable.json
@@ -0,0 +1,5 @@
+{
+  "values": [
+    "processed_obsidian:obsidian_bricks"
+  ]
+}
\ No newline at end of file
diff --git a/src/generated/resources/data/minecraft/tags/block/sculk_replaceable_world_gen.json b/src/generated/resources/data/minecraft/tags/block/sculk_replaceable_world_gen.json
new file mode 100644
index 0000000..a77eaff
--- /dev/null
+++ b/src/generated/resources/data/minecraft/tags/block/sculk_replaceable_world_gen.json
@@ -0,0 +1,9 @@
+{
+  "values": [
+    "processed_obsidian:obsidian_tiles",
+    "processed_obsidian:cracked_obsidian_tiles",
+    "processed_obsidian:cracked_obsidian_bricks",
+    "processed_obsidian:obsidian_bricks",
+    "processed_obsidian:polished_obsidian"
+  ]
+}
\ No newline at end of file
diff --git a/src/main/java/ovh/glitchlabs/processed_obsidian/datagen/ModBlockTagProvider.java b/src/main/java/ovh/glitchlabs/processed_obsidian/datagen/ModBlockTagProvider.java
index 00d6aa1..1fa1633 100644
--- a/src/main/java/ovh/glitchlabs/processed_obsidian/datagen/ModBlockTagProvider.java
+++ b/src/main/java/ovh/glitchlabs/processed_obsidian/datagen/ModBlockTagProvider.java
@@ -32,5 +32,15 @@ public class ModBlockTagProvider extends BlockTagsProvider {
                 .add(ModBlocks.OBSIDIAN_BRICKS.get())
                 .add(ModBlocks.POLISHED_OBSIDIAN.get());
 
+        tag(BlockTags.ANCIENT_CITY_REPLACEABLE)
+                .add(ModBlocks.OBSIDIAN_BRICKS.get());
+
+        tag(BlockTags.SCULK_REPLACEABLE_WORLD_GEN)
+                .add(ModBlocks.OBSIDIAN_TILES.get())
+                .add(ModBlocks.CRACKED_OBSIDIAN_TILES.get())
+                .add(ModBlocks.CRACKED_OBSIDIAN_BRICKS.get())
+                .add(ModBlocks.OBSIDIAN_BRICKS.get())
+                .add(ModBlocks.POLISHED_OBSIDIAN.get());
+
     }
 }
\ No newline at end of file