diff --git a/init.lua b/init.lua
index 3f104aa..00ebddc 100644
--- a/init.lua
+++ b/init.lua
@@ -1,5 +1,6 @@
 mcl_better_end = {}
 mcl_better_end.api = {}
+mcl_better_end.api.consts = {}
 
 mcl_better_end.mapgen = {}
 mcl_better_end.mapgen.ores = {}
@@ -16,7 +17,7 @@ dofile(mcl_better_end.code_loc .. "/nodes/nodes_night.lua")
 dofile(mcl_better_end.code_loc .. "/nodes/nodes_ender_sea.lua")
 
 
-dofile(mcl_better_end.code_loc .. "/mapgen/biome.lua")
+dofile(mcl_better_end.code_loc .. "/mapgen/mapgen.lua")
 
 dofile(mcl_better_end.code_loc .. "/items/items.lua")
 
diff --git a/schems/end_sub.mts b/schems/end_sub.mts
new file mode 100644
index 0000000..69cf0c8
Binary files /dev/null and b/schems/end_sub.mts differ
diff --git a/src/mapgen/biome_ender_sea.lua b/src/mapgen/biome_ender_sea.lua
index e69de29..8f7da02 100644
--- a/src/mapgen/biome_ender_sea.lua
+++ b/src/mapgen/biome_ender_sea.lua
@@ -0,0 +1,80 @@
+-- Define items to add to the chest with their max count and chance
+local items_to_add = {
+    {i = "mcl_better_end:ender_shard", c = 1, x = 5},
+    {i = "mcl_better_end:end_glow_berry", c = 16, x = 3},
+    {i = "mcl_end:crystal", c = 32, x = 20},
+    {i = "mcl_throwing:ender_pearl", c = 4, x = 3},
+    {i = "mcl_throwing:ender_pearl", c = 16, x = 10},
+    {i = "mcl_armor:elytra", c = 1, x = 100},
+}
+
+-- Function to place a schematic and a chest, then fill the chest with items
+local function make_sub(pos, pr)
+    -- Place the schematic
+    minetest.place_schematic(pos, mcl_better_end.schematic_loc .. "/end_sub.mts", "0", nil, true)
+
+    -- Define chest position
+    local chest_pos = {x = pos.x + 4, y = pos.y + 1, z = pos.z + 4}
+
+    -- Place the chest
+    minetest.set_node(chest_pos, {name = "mcl_chests:chest"})
+
+    -- Get chest metadata and inventory
+    local meta = minetest.get_meta(chest_pos)
+    local inv = meta:get_inventory()
+    inv:set_size("main", 16)  -- Initialize inventory
+
+    local slots_used_c = 0
+    local slots_used = {}
+
+    -- Fill the chest with items
+    while slots_used_c < 6 do
+        for _, item in ipairs(items_to_add) do
+            local item_name = item.i
+            local quantity = item.c
+
+            -- Determine if the item should be included based on chance
+            if pr:next(1, item.x) == item.x then
+                -- Select a random slot
+                local slot = pr:next(1, 16)
+                while slots_used[slot] do
+                    slot = pr:next(1, 16)
+                end
+                
+                inv:set_stack("main", slot, item_name .. " " .. pr:next(1, quantity))
+
+                slots_used[slot] = true
+                slots_used_c = slots_used_c + 1
+                if slots_used_c == 16 then
+                    return
+                end
+            end
+        end
+    end
+end
+
+
+
+mcl_better_end.api.register_biome({
+    type = "sea",
+    dec = function(pr, x, y, z, perlin)
+        if pr:next(1, 4000) == 5 then
+            if perlin:get_3d({x = x, y = y, z = z}) < (mcl_better_end.api.consts.sea_ends + 0.00001) then
+                make_sub({x=x,y=y,z=z}, pr)
+            end
+        end
+    end,
+    noise_high = 1,
+    noise_low = 0
+})
+
+minetest.register_chatcommand("spawn_endsub", {
+    params = "<radius>",
+    description = "Check if the area around you is empty within a certain radius",
+    func = function(player_name, param)
+        -- Get the player's position
+        local player = minetest.get_player_by_name(player_name)
+        local pos = player:get_pos()
+        make_sub(pos, PseudoRandom(math.random(1, 1000)))
+    end,
+})
\ No newline at end of file
diff --git a/src/mapgen/biome.lua b/src/mapgen/mapgen.lua
similarity index 92%
rename from src/mapgen/biome.lua
rename to src/mapgen/mapgen.lua
index b1119da..b0857f5 100644
--- a/src/mapgen/biome.lua
+++ b/src/mapgen/mapgen.lua
@@ -35,6 +35,10 @@ end
 
 
 
+mcl_better_end.api.consts.sea_starts = -0.5
+mcl_better_end.api.consts.sea_ends = -1
+
+
 mcl_better_end.api.is_cave = function(x, y, z)
     local noise = get_perlin_noise(perlin_l, x, y, z)
     return (noise >= 0.8) or (get_perlin_noise(perlin_l, x, y + 1, z) >= 0.8)
@@ -46,7 +50,7 @@ mcl_better_end.api.is_island = function(x, y, z)
 end
 
 mcl_better_end.api.is_sea = function(x, y, z)
-    return get_perlin_noise(perlin_l, x, y, z) < -0.5
+    return get_perlin_noise(perlin_l, x, y, z) < mcl_better_end.api.consts.sea_starts
 end
 
 mcl_better_end.api.is_free = function(x, y, z)
@@ -112,12 +116,12 @@ function mcl_better_end.mapgen.gen(minp, maxp, seed)
                 if mcl_better_end.api.is_island(x, y, z) then
                     data[vi] = mcl_better_end.mapgen.registered_nodes.end_stone
                     for _, f in pairs(mcl_better_end.mapgen.ores) do
-                        f(data, vi, area, pr, x, y, z)
+                        f(data, vi, area, pr, x, y, z, perlin_l)
                     end
                     if mcl_better_end.api.is_free(x, y + 1, z) then
                         for _, p in pairs(mcl_better_end.biomes) do
                             if p.type == "island" and p.gen and noise_center >= p.noise_low and noise_center <= p.noise_high then
-                                p.gen(data, vi, area, pr, x, y, z)
+                                p.gen(data, vi, area, pr, x, y, z, perlin_l)
                             end
                         end
                     end
@@ -128,7 +132,7 @@ function mcl_better_end.mapgen.gen(minp, maxp, seed)
                     if mcl_better_end.api.is_cave(x, y + 1, z) then
                         for _, p in pairs(mcl_better_end.biomes) do
                             if p.type == "cave" and p.gen and noise_center >= p.noise_low and noise_center <= p.noise_high then
-                                p.gen(data, vi, area, pr, x, y, z)
+                                p.gen(data, vi, area, pr, x, y, z, perlin_l)
                             end
                         end
                     end
@@ -137,7 +141,7 @@ function mcl_better_end.mapgen.gen(minp, maxp, seed)
                     data[vi] = mcl_better_end.mapgen.registered_nodes.sea
                     for _, p in pairs(mcl_better_end.biomes) do
                         if p.type == "sea" and p.gen and noise_center >= p.noise_low and noise_center <= p.noise_high then
-                            p.gen(data, vi, area, pr, x, y, z)
+                            p.gen(data, vi, area, pr, x, y, z, perlin_l)
                         end
                     end
                     goto keepitup
@@ -173,7 +177,7 @@ function mcl_better_end.mapgen.dec(minp, maxp, seed)
                     if mcl_better_end.api.is_free(x, y + 1, z) then
                         for _, p in pairs(mcl_better_end.biomes) do
                             if p.type == "island" and p.dec and noise_center >= p.noise_low and noise_center <= p.noise_high then
-                                p.dec(pr, x, y, z)
+                                p.dec(pr, x, y, z, perlin_l)
                             end
                         end
                     end
@@ -183,7 +187,7 @@ function mcl_better_end.mapgen.dec(minp, maxp, seed)
                     local vi = area:index(x, y, z)
                     for _, p in pairs(mcl_better_end.biomes) do
                         if p.type == "cave" and p.dec and noise_center >= p.noise_low and noise_center <= p.noise_high then
-                            p.dec(pr, x, y, z)
+                            p.dec(pr, x, y, z, perlin_l)
                         end
                     end
                     goto keepitup
@@ -191,7 +195,7 @@ function mcl_better_end.mapgen.dec(minp, maxp, seed)
                 elseif mcl_better_end.api.is_sea(x, y, z) then
                     for _, p in pairs(mcl_better_end.biomes) do
                         if p.type == "sea" and p.dec and noise_center >= p.noise_low and noise_center <= p.noise_high then
-                            p.dec(pr, x, y, z)
+                            p.dec(pr, x, y, z, perlin_l)
                         end
                     end
                     goto keepitup