diff --git a/core.clutter/objects/stump/stump1.iob b/core.clutter/objects/stump/stump1.iob
index e461222f..0ebe709a 100644
Binary files a/core.clutter/objects/stump/stump1.iob and b/core.clutter/objects/stump/stump1.iob differ
diff --git a/core.clutter/objects/stump/stump2.iob b/core.clutter/objects/stump/stump2.iob
index a17f2353..11426d20 100644
Binary files a/core.clutter/objects/stump/stump2.iob and b/core.clutter/objects/stump/stump2.iob differ
diff --git a/core.clutter/objects/stump/stump3.iob b/core.clutter/objects/stump/stump3.iob
index df1efb1b..1e1be6cd 100644
Binary files a/core.clutter/objects/stump/stump3.iob and b/core.clutter/objects/stump/stump3.iob differ
diff --git a/core.clutter/objects/stump/stump4.iob b/core.clutter/objects/stump/stump4.iob
index 2a504a65..a4978c0e 100644
Binary files a/core.clutter/objects/stump/stump4.iob and b/core.clutter/objects/stump/stump4.iob differ
diff --git a/core.clutter/objects/stump/stump5.iob b/core.clutter/objects/stump/stump5.iob
index 11426d20..c77a9b20 100644
Binary files a/core.clutter/objects/stump/stump5.iob and b/core.clutter/objects/stump/stump5.iob differ
diff --git a/core.clutter/objects/stump/stump6.iob b/core.clutter/objects/stump/stump6.iob
index 0ebe709a..c06f5a85 100644
Binary files a/core.clutter/objects/stump/stump6.iob and b/core.clutter/objects/stump/stump6.iob differ
diff --git a/iris.overworld.frozen/biomes/frozen-ice-cavern.json b/iris.overworld.frozen/biomes/frozen-ice-cavern.json
new file mode 100644
index 00000000..f3230f89
--- /dev/null
+++ b/iris.overworld.frozen/biomes/frozen-ice-cavern.json
@@ -0,0 +1,83 @@
+{
+    "name": "Murky Cavern",
+    "layers": [
+        {
+            "dispersion": "WISPY",
+            "terrainZoom": 0.2,
+            "minHeight": 1,
+            "maxHeight": 2,
+            "palette": [
+                "BLUE_ICE",
+                "PACKED_ICE",
+                "ICE",
+                "ICE",
+                "ICE",
+                "ICE",
+                "ICE",
+                "ICE"
+            ]
+        },
+        {
+            "dispersion": "WISPY",
+            "terrainZoom": 0.2,
+            "minHeight": 1,
+            "maxHeight": 1,
+            "palette": [
+                "ICE"
+            ]
+        }
+        
+    ],
+    "slab": {
+        "dispersion": "WISPY",
+        "terrainZoom": 0.5,
+        "palette": [
+            "minecraft:cobblestone_slab[type=bottom,waterlogged=false]",
+            "minecraft:mossy_cobblestone_slab[type=bottom,waterlogged=false]",
+            "AIR"
+        ]
+    },
+    "decorators": [
+        
+        {
+            "zoom": 0.3,
+            "chance": 0.02,
+            "palette": [
+                "COBWEB"
+            ],
+            "dispersion": "SCATTER",
+            "variance": "SCATTER"
+        },
+        {
+            "zoom": 0.3,
+            "chance": 0.01,
+            "palette": [
+                "CORNFLOWER"
+            ],
+            "dispersion": "SCATTER",
+            "variance": "SCATTER"
+        },
+        {
+            "zoom": 0.3,
+            "chance": 0.001,
+            "palette": [
+                "PRISMARINE_WALL"
+            ],
+            "dispersion": "SCATTER",
+            "variance": "SCATTER"
+        }
+    ],
+    "generators":[
+        {
+            "generator": "plain",
+            "min": 4,
+            "max": 6
+        },
+        {
+            "generator": "wavy",
+            "min": 2,
+            "max": 5
+        }
+    ],
+    "derivative": "FROZEN_OCEAN"
+}
\ No newline at end of file
diff --git a/iris.overworld.frozen/regions/frozen.json b/iris.overworld.frozen/regions/frozen.json
index 8bbb27ef..0c538841 100644
--- a/iris.overworld.frozen/regions/frozen.json
+++ b/iris.overworld.frozen/regions/frozen.json
@@ -15,6 +15,9 @@
     "shoreBiomes": [
         "frozen-beach"
     ],
+    "caveBiomes": [
+        "frozen-ice-cavern"
+    ],
     "spotBiomes": [
         {
             "biome": "frozen-ocean",
diff --git a/iris.overworld.swamp/biomes/swamp-murky-cavern.json b/iris.overworld.swamp/biomes/swamp-murky-cavern.json
new file mode 100644
index 00000000..2b292ebd
--- /dev/null
+++ b/iris.overworld.swamp/biomes/swamp-murky-cavern.json
@@ -0,0 +1,62 @@
+{
+    "name": "Murky Cavern",
+    "layers": [
+        {
+            "maxHeight": 2,
+            "dispersion": "WISPY",
+            "terrainZoom": 0.1,
+            "minHeight": 1,
+            "palette": [
+                "STONE",
+                "COBBLESTONE",
+                "COBBLESTONE",
+                "MOSSY_COBBLESTONE",
+                "GRASS_BLOCK",
+                "GRASS_BLOCK"
+            ]
+        }
+    ],
+    "slab": {
+        "dispersion": "WISPY",
+        "terrainZoom": 0.5,
+        "palette": [
+            "minecraft:cobblestone_slab[type=bottom,waterlogged=false]",
+            "minecraft:mossy_cobblestone_slab[type=bottom,waterlogged=false]",
+            "AIR"
+        ]
+    },
+    "decorators": [
+        {
+            "zoom": 0.3,
+            "chance": 0.05,
+            "palette": [
+                "BROWN_MUSHROOM",
+                "RED_MUSHROOM"
+            ],
+            "dispersion": "SCATTER",
+            "variance": "SCATTER"
+        },
+        {
+            "zoom": 0.3,
+            "chance": 0.001,
+            "palette": [
+                "COBWEB"
+            ],
+            "dispersion": "SCATTER",
+            "variance": "SCATTER"
+        }
+    ],
+    "generators":[
+        {
+            "generator": "plain",
+            "min": 4,
+            "max": 6
+        },
+        {
+            "generator": "wavy",
+            "min": 2,
+            "max": 5
+        }
+    ],
+    "derivative": "SWAMP"
+}
\ No newline at end of file
diff --git a/iris.overworld.swamp/regions/swamp.json b/iris.overworld.swamp/regions/swamp.json
index a3495818..a6857411 100644
--- a/iris.overworld.swamp/regions/swamp.json
+++ b/iris.overworld.swamp/regions/swamp.json
@@ -16,6 +16,10 @@
         "swamp-beach"
 
     ],
+    "caveBiomes":[
+        "swamp-murky-cavern"
+    ],
+
     "deposits":[
         {
             "minHeight": 35,