diff --git a/CHANGELOG.md b/CHANGELOG.md
index 673fd1c..15ee0b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -39,11 +39,14 @@ Other Game Changes:
 - Fireworks now damage entities when they're too close to the explosion
 - Added new damage types `fireworks` and `projectile`
 - Add healing information to food descriptions
+- Replaced Grassland biome with Plains
+- Added FrozenPeaks biome
 
 Code Changes:
 
 - Reorganize `pyutest_crafts` mod
 - Addded .editorconfig file and .luarc.json file
+- Update unified_inventory and mobs_redo
 
 ## [Dec 1st] Unnamed Minor Update
 
diff --git a/mods/PLAYER/pyutest_cmds/init.lua b/mods/PLAYER/pyutest_cmds/init.lua
index 73a5a99..c67e498 100644
--- a/mods/PLAYER/pyutest_cmds/init.lua
+++ b/mods/PLAYER/pyutest_cmds/init.lua
@@ -78,10 +78,11 @@ core.register_chatcommand("teleport", {
         return
       end
     end
-
+    
+    local caller = core.get_player_by_name(name)
     for _, v in pairs(targets) do
       local plr = core.get_player_by_name(v)
-      local pos = plr:get_pos()
+      local pos = caller:get_pos()
 
       local nx = core.parse_relative_number(x, pos.x)
       local ny = core.parse_relative_number(y, pos.y)
diff --git a/mods/WORLD/pyutest_mapgen/api.lua b/mods/WORLD/pyutest_mapgen/api.lua
index 2f09667..bd3d039 100644
--- a/mods/WORLD/pyutest_mapgen/api.lua
+++ b/mods/WORLD/pyutest_mapgen/api.lua
@@ -66,11 +66,21 @@ PyuTest.MOUNTAIN_STRIP_NOISE_PARAMS = {
 
 PyuTest.OVERWORLD_BIOME_TOPS = {
   lowland = 10,
-  normal = 200,
+  normal = 45,
+  elevated = 200,
   highlands = 1000,
   skyland = 31000,
 }
 
+PyuTest.BIOME_WEIGHTS = {
+  tiny = 0.4,
+  small = 0.8,
+  normal = 1.0,
+  big = 1.3,
+  large = 1.8,
+  vast = 2.2
+}
+
 -- Overworld biome types
 PyuTest.BIOME_TYPES = {
   -- Normal biomes (Forests for example)
diff --git a/mods/WORLD/pyutest_overworld/biomes.lua b/mods/WORLD/pyutest_overworld/biomes.lua
index 5d3b643..e0aa69c 100644
--- a/mods/WORLD/pyutest_overworld/biomes.lua
+++ b/mods/WORLD/pyutest_overworld/biomes.lua
@@ -14,15 +14,17 @@ if PyuTest.is_flat() then
 end
 
 -- "Just right"
-PyuTest.register_overworld_biome("Grassland", PyuTest.BIOME_TYPES.NORMAL, {
+PyuTest.register_overworld_biome("Plains", PyuTest.BIOME_TYPES.NORMAL, {
   node_top = "pyutest_grass:grass_block",
   node_filler = "pyutest_blocks:dirt_block",
 
   y_max = PyuTest.OVERWORLD_BIOME_TOPS.normal,
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
-  heat_point = 50,
-  humidity_point = 60,
+  heat_point = 65,
+  humidity_point = 40,
+
+  weight = PyuTest.BIOME_WEIGHTS.large,
 
   _pyutest_biome_flowering = true
 })
@@ -35,7 +37,9 @@ PyuTest.register_overworld_biome("Forest", PyuTest.BIOME_TYPES.NORMAL, {
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 50,
-  humidity_point = 66,
+  humidity_point = 80,
+
+  weight = PyuTest.BIOME_WEIGHTS.big,
 
   _pyutest_biome_flowering = true
 })
@@ -48,7 +52,9 @@ PyuTest.register_overworld_biome("BirchForest", PyuTest.BIOME_TYPES.NORMAL, {
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 50,
-  humidity_point = 68,
+  humidity_point = 84,
+  
+  weight = PyuTest.BIOME_WEIGHTS.big,
 
   _pyutest_biome_flowering = true
 })
@@ -61,7 +67,9 @@ PyuTest.register_overworld_biome("OldGrowthBirchForest", PyuTest.BIOME_TYPES.NOR
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 50,
-  humidity_point = 70,
+  humidity_point = 87,
+
+  weight = PyuTest.BIOME_WEIGHTS.big,
 
   _pyutest_biome_flowering = true,
   _pyutest_biome_flowering_extra = true
@@ -72,12 +80,15 @@ PyuTest.register_overworld_biome("Meadow", PyuTest.BIOME_TYPES.NORMAL, {
   node_filler = "pyutest_blocks:dirt_block",
   depth_filler = 4,
 
-  y_max = PyuTest.OVERWORLD_BIOME_TOPS.normal,
-  y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
+  y_max = PyuTest.OVERWORLD_BIOME_TOPS.elevated,
+  y_min = PyuTest.OVERWORLD_BIOME_TOPS.normal,
 
   heat_point = 50,
-  humidity_point = 65,
+  humidity_point = 83,
 
+  weight = PyuTest.BIOME_WEIGHTS.big,
+
+  _enable_beaches = false,
   _pyutest_biome_flowering = true,
   _pyutest_biome_flowering_extra = true
 })
@@ -86,12 +97,15 @@ PyuTest.register_overworld_biome("CherryGrove", PyuTest.BIOME_TYPES.NORMAL, {
   node_top = "pyutest_grass:grass_block",
   node_filler = "pyutest_blocks:dirt_block",
 
-  y_max = PyuTest.OVERWORLD_BIOME_TOPS.normal,
-  y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
+  y_max = PyuTest.OVERWORLD_BIOME_TOPS.elevated,
+  y_min = PyuTest.OVERWORLD_BIOME_TOPS.normal,
 
   heat_point = 50,
-  humidity_point = 60,
+  humidity_point = 85,
 
+  weight = PyuTest.BIOME_WEIGHTS.small,
+
+  _enable_beaches = false,
   _pyutest_biome_flowering = true,
   _pyutest_biome_flowering_extra = true
 })
@@ -100,13 +114,17 @@ PyuTest.register_overworld_biome("CherryGrove", PyuTest.BIOME_TYPES.NORMAL, {
 PyuTest.register_overworld_biome("Desert", PyuTest.BIOME_TYPES.HOT, {
   node_top = "pyutest_blocks:sand_block",
   node_filler = "pyutest_blocks:sandstone_block",
+  depth_filler = 9,
+
   node_riverbed = "pyutest_blocks:sand_block",
 
-  y_max = PyuTest.OVERWORLD_BIOME_TOPS.normal,
+  y_max = PyuTest.OVERWORLD_BIOME_TOPS.elevated,
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 80,
-  humidity_point = 10,
+  humidity_point = 0,
+
+  weight = PyuTest.BIOME_WEIGHTS.vast,
 
   _enable_beaches = false
 })
@@ -119,7 +137,9 @@ PyuTest.register_overworld_biome("Savanna", PyuTest.BIOME_TYPES.WARM, {
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 75,
-  humidity_point = 10
+  humidity_point = 0,
+
+  weight = PyuTest.BIOME_WEIGHTS.large,
 })
 
 -- Decent
@@ -131,7 +151,9 @@ PyuTest.register_overworld_biome("MushroomFields", PyuTest.BIOME_TYPES.NORMAL, {
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 30,
-  humidity_point = 96,
+  humidity_point = 94,
+
+  weight = PyuTest.BIOME_WEIGHTS.tiny,
 
   _enable_beaches = false,
   _pyutest_fog_distance = 60,
@@ -145,7 +167,9 @@ PyuTest.register_overworld_biome("LargeMushroomForest", PyuTest.BIOME_TYPES.NORM
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 30,
-  humidity_point = 96,
+  humidity_point = 95,
+
+  weight = PyuTest.BIOME_WEIGHTS.tiny,
 
   _enable_beaches = false,
   _pyutest_fog_distance = 60,
@@ -159,7 +183,9 @@ PyuTest.register_overworld_biome("Swamp", PyuTest.BIOME_TYPES.WETLAND, {
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 30,
-  humidity_point = 88,
+  humidity_point = 100,
+
+  weight = PyuTest.BIOME_WEIGHTS.tiny,
 
   _enable_beaches = false,
   _pyutest_fog_distance = 60,
@@ -174,7 +200,9 @@ PyuTest.register_overworld_biome("Taiga", PyuTest.BIOME_TYPES.CHILLY, {
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 20,
-  humidity_point = 42,
+  humidity_point = 72,
+
+  weight = PyuTest.BIOME_WEIGHTS.small,
 
   _pyutest_biome_flowering = true
 })
@@ -187,7 +215,9 @@ PyuTest.register_overworld_biome("AspenForest", PyuTest.BIOME_TYPES.CHILLY, {
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 20,
-  humidity_point = 50,
+  humidity_point = 74,
+  
+  weight = PyuTest.BIOME_WEIGHTS.small,
 
   _pyutest_biome_flowering = true,
   _pyutest_fog_distance = 60,
@@ -201,7 +231,9 @@ PyuTest.register_overworld_biome("RedwoodForest", PyuTest.BIOME_TYPES.CHILLY, {
   y_min = PyuTest.OVERWORLD_SURFACE_BOTTOM,
 
   heat_point = 20,
-  humidity_point = 58,
+  humidity_point = 76,
+
+  weight = PyuTest.BIOME_WEIGHTS.small,
 
   _pyutest_biome_flowering = true,
   _pyutest_fog_distance = 60,
@@ -219,9 +251,10 @@ PyuTest.register_overworld_biome("FrozenPlains", PyuTest.BIOME_TYPES.COLD, {
   node_water_top = "pyutest_blocks:ice_block",
   depth_water_top = 1,
 
-  heat_point = 5,
-  humidity_point = 69,
-  _pyutest_fog_distance = 80,
+  heat_point = 0,
+  humidity_point = 73,
+
+  weight = PyuTest.BIOME_WEIGHTS.large,
 })
 
 PyuTest.register_overworld_biome("SnowyForest", PyuTest.BIOME_TYPES.COLD, {
@@ -235,9 +268,10 @@ PyuTest.register_overworld_biome("SnowyForest", PyuTest.BIOME_TYPES.COLD, {
   node_water_top = "pyutest_blocks:ice_block",
   depth_water_top = 5,
 
-  heat_point = 5,
-  humidity_point = 75,
-  _pyutest_fog_distance = 80,
+  heat_point = 0,
+  humidity_point = 78,
+
+  weight = PyuTest.BIOME_WEIGHTS.large,
 })
 
 PyuTest.register_overworld_biome("IceSpikes", PyuTest.BIOME_TYPES.COLD, {
@@ -250,8 +284,27 @@ PyuTest.register_overworld_biome("IceSpikes", PyuTest.BIOME_TYPES.COLD, {
   node_water_top = "pyutest_blocks:ice_block",
   depth_water_top = 5,
 
-  heat_point = 5,
-  humidity_point = 62,
-  _pyutest_fog_distance = 80,
+  heat_point = 0,
+  humidity_point = 75,
+  
+  weight = PyuTest.BIOME_WEIGHTS.large,
+
+  _enable_beaches = false
+})
+
+PyuTest.register_overworld_biome("FrozenPeaks", PyuTest.BIOME_TYPES.COLD, {
+  node_top = "pyutest_blocks:snow_block",
+  node_filler = "pyutest_blocks:ice_block",
+  depth_filler = 20,
+  node_stone = "pyutest_blocks:ice_block",
+
+  y_max = PyuTest.OVERWORLD_BIOME_TOPS.elevated,
+  y_min = PyuTest.OVERWORLD_BIOME_TOPS.normal,
+
+  heat_point = 0,
+  humidity_point = 75,
+  
+  weight = PyuTest.BIOME_WEIGHTS.large,
+
   _enable_beaches = false
 })
diff --git a/mods/WORLD/pyutest_overworld/flowers.lua b/mods/WORLD/pyutest_overworld/flowers.lua
index 37c923d..12ca7e1 100644
--- a/mods/WORLD/pyutest_overworld/flowers.lua
+++ b/mods/WORLD/pyutest_overworld/flowers.lua
@@ -21,7 +21,7 @@ core.register_decoration({
   place_on = { "group:grass" },
   sidelen = 16,
   fill_ratio = 0.0018,
-  biomes = { "Grassland" },
+  biomes = { "Plains" },
   decoration = "pyutest_blocks:haybale_block"
 })
 
diff --git a/mods/WORLD/pyutest_overworld/trees.lua b/mods/WORLD/pyutest_overworld/trees.lua
index c1eeb77..40d2865 100644
--- a/mods/WORLD/pyutest_overworld/trees.lua
+++ b/mods/WORLD/pyutest_overworld/trees.lua
@@ -14,7 +14,7 @@ core.register_decoration({
   place_on = { "group:grass" },
   sidelen = 16,
   fill_ratio = 0.00045,
-  biomes = { "Grassland" },
+  biomes = { "Plains" },
   schematic = PyuTest.get_schematic_path("Tree"),
   rotation = "random",
   flags = "place_center_x, place_center_z",
diff --git a/mods/mobs_redo b/mods/mobs_redo
index 77b53b9..c24874a 160000
--- a/mods/mobs_redo
+++ b/mods/mobs_redo
@@ -1 +1 @@
-Subproject commit 77b53b905443b894153ff6033c1a1e32261956bd
+Subproject commit c24874a3bf094dbef5327c988937ccfe632b2d8e
diff --git a/mods/unified_inventory b/mods/unified_inventory
index 16265dc..43cf0d8 160000
--- a/mods/unified_inventory
+++ b/mods/unified_inventory
@@ -1 +1 @@
-Subproject commit 16265dca2dc2133fb9dd8bf31efd78077fa91a3d
+Subproject commit 43cf0d8e7e5701d976a5b7b01bdf0194aa783295