diff --git a/docs/capabilities.md b/docs/capabilities.md
index c7bd11a5..848dc9af 100644
--- a/docs/capabilities.md
+++ b/docs/capabilities.md
@@ -26,6 +26,7 @@ Used by:
 
 Functions:
  - `globalize(entity_id, instantly: bool)`
+ - `register_pickup_handler(fn(local_item_id))`
 
 Provided by:
  - item_sync system
diff --git a/quant.ew/files/src/system/debug.lua b/quant.ew/files/src/system/debug.lua
index ff033499..8e65d3e0 100644
--- a/quant.ew/files/src/system/debug.lua
+++ b/quant.ew/files/src/system/debug.lua
@@ -15,20 +15,24 @@ function module.on_local_player_spawn(my_player)
 
     -- EntitySetTransform(player_entity, 512*3+10, 512*3+10)
 
+    EntitySetTransform(player_entity, 3400, 13040)
+
     -- util.load_ephemerial("mods/quant.ew/files/entities/client.xml", 512*3+20, 512*3+10)
     -- EntityLoad("mods/quant.ew/files/entities/client.xml", 512*3+20, 512*3+10)
 
-    util.set_ent_health(player_entity, {1000, 1000})
+    ctx.cap.health.set_max_health(1000)
+    ctx.cap.health.set_health(1000)
+    -- util.set_ent_health(player_entity, {1000, 1000})
     local wallet = EntityGetFirstComponentIncludingDisabled(player_entity, "WalletComponent")
     ComponentSetValue2(wallet, "money", 100000)
     -- GameSetCameraFree(true)
 
-    dofile_once("data/scripts/perks/perk.lua")
-    local x, y = EntityGetFirstHitboxCenter(player_entity)
-    perk_spawn(x, y, "LASER_AIM", true)
-    perk_spawn(x-50, y, "GLASS_CANNON", true)
-    perk_spawn(x-25, y, "EDIT_WANDS_EVERYWHERE", true)
-    EntityLoad("data/entities/items/pickup/heart.xml", x-75, y-20)
+    -- dofile_once("data/scripts/perks/perk.lua")
+    -- local x, y = EntityGetFirstHitboxCenter(player_entity)
+    -- perk_spawn(x, y, "LASER_AIM", true)
+    -- perk_spawn(x-50, y, "GLASS_CANNON", true)
+    -- perk_spawn(x-25, y, "EDIT_WANDS_EVERYWHERE", true)
+    -- EntityLoad("data/entities/items/pickup/heart.xml", x-75, y-20)
 
 end
 
diff --git a/quant.ew/files/src/system/item_sync.lua b/quant.ew/files/src/system/item_sync.lua
index 45b7afd4..2aa35a06 100644
--- a/quant.ew/files/src/system/item_sync.lua
+++ b/quant.ew/files/src/system/item_sync.lua
@@ -11,6 +11,7 @@ local rpc = net.new_rpc_namespace()
 local item_sync = {}
 
 local pending_remove = {}
+local pickup_handlers = {}
 
 function item_sync.ensure_notify_component(ent)
     local notify = EntityGetFirstComponentIncludingDisabled(ent, "LuaComponent", "ew_notify_component")
@@ -55,6 +56,16 @@ function item_sync.remove_item_with_id(gid)
     table.insert(pending_remove, gid)
 end
 
+function item_sync.find_by_gid(gid)
+    local global_items = EntityGetWithTag("ew_global_item")
+    for _, item in ipairs(global_items) do
+        local i_gid = item_sync.get_global_item_id(item)
+        if i_gid == gid then
+            return item
+        end
+    end
+end
+
 function item_sync.remove_item_with_id_now(gid)
     local global_items = EntityGetWithTag("ew_global_item")
     for _, item in ipairs(global_items) do
@@ -66,7 +77,6 @@ function item_sync.remove_item_with_id_now(gid)
 end
 
 function item_sync.host_localize_item(gid, peer_id)
-    GamePrint("Will localize")
     if ctx.item_prevent_localize[gid] then
         GamePrint("Item localize for "..gid.." prevented")
     end
@@ -77,7 +87,12 @@ function item_sync.host_localize_item(gid, peer_id)
         return
     end
 
-
+    local item_ent_id = item_sync.find_by_gid(gid)
+    if item_ent_id ~= nil then
+        for _, handler in ipairs(pickup_handlers) do
+            handler(item_ent_id)
+        end
+    end
     if peer_id ~= ctx.my_id then
         item_sync.remove_item_with_id(gid)
     end
@@ -94,6 +109,7 @@ function item_sync.make_item_global(item, instant)
             GamePrint("Thrown item vanished before we could send it")
             return
         end
+        item_sync.ensure_notify_component(item)
         local gid_component = EntityGetFirstComponentIncludingDisabled(item, "VariableStorageComponent", "ew_global_item_id")
         local gid = ComponentGetValue2(gid_component, "value_string")
         if gid_component == nil then
@@ -198,6 +214,12 @@ end
 
 rpc.opts_reliable()
 function rpc.item_localize(l_peer_id, item_id)
+    local item_ent_id = item_sync.find_by_gid(item_id)
+    if item_ent_id ~= nil then
+        for _, handler in ipairs(pickup_handlers) do
+            handler(item_ent_id)
+        end
+    end
     if l_peer_id ~= ctx.my_id then
         item_sync.remove_item_with_id(item_id)
     end
@@ -212,7 +234,10 @@ function rpc.item_localize_req(gid)
 end
 
 ctx.cap.item_sync = {
-    globalize = item_sync.make_item_global
+    globalize = item_sync.make_item_global,
+    register_pickup_handler = function(handler)
+        table.insert(pickup_handlers, handler)
+    end
 }
 
 return item_sync
\ No newline at end of file
diff --git a/quant.ew/files/src/system/kolmi/append/boss_arena.lua b/quant.ew/files/src/system/kolmi/append/boss_arena.lua
new file mode 100644
index 00000000..08f5543b
--- /dev/null
+++ b/quant.ew/files/src/system/kolmi/append/boss_arena.lua
@@ -0,0 +1,6 @@
+local old_spawn_items = spawn_items
+
+function spawn_items(x, y)
+    old_spawn_items(x, y)
+    CrossCall("ew_sampo_spawned")
+end
\ No newline at end of file
diff --git a/quant.ew/files/src/system/kolmi/kolmi.lua b/quant.ew/files/src/system/kolmi/kolmi.lua
index 4e188710..84843ee0 100644
--- a/quant.ew/files/src/system/kolmi/kolmi.lua
+++ b/quant.ew/files/src/system/kolmi/kolmi.lua
@@ -4,10 +4,35 @@ local net = dofile_once("mods/quant.ew/files/src/net.lua")
 local player_fns = dofile_once("mods/quant.ew/files/src/player_fns.lua")
 local np = require("noitapatcher")
 
+ModLuaFileAppend("data/scripts/biomes/boss_arena.lua", "mods/quant.ew/files/src/system/kolmi/append/boss_arena.lua")
+
 local rpc = net.new_rpc_namespace()
 
 local module = {}
 
 
+np.CrossCallAdd("ew_sampo_spawned", function()
+    local sampo_ent = EntityGetClosestWithTag(0, 0, "this_is_sampo")
+    if sampo_ent == nil or sampo_ent == 0 then
+        -- In case sampo wasn't actually spawned.
+        return
+    end
+    if ctx.is_host then
+        -- First lua component is the one that has pickup script.
+        local pickup_component = EntityGetFirstComponentIncludingDisabled(sampo_ent, "LuaComponent")
+        -- Remove it as to not handle pickup twice.
+        EntityRemoveComponent(sampo_ent, pickup_component)
+        ctx.cap.item_sync.globalize(sampo_ent)
+    else
+        EntityKill(sampo_ent)
+    end
+end)
+
+ctx.cap.item_sync.register_pickup_handler(function(item_id)
+    if ctx.is_host and EntityHasTag(item_id, "this_is_sampo") then
+        dofile("data/entities/animals/boss_centipede/sampo_pickup.lua")
+        item_pickup(item_id)
+    end
+end)
 
 return module
\ No newline at end of file