fix frost spike a bit more

src/scenes/game_world.tscn

@@ -92,6 +92,9 @@ z_index = -2
 material = SubResource("ShaderMaterial_pdbwf")
 tile_set = ExtResource("9")
 
+[node name="TileMapLayerMiddle" type="TileMapLayer" parent="Environment" unique_id=1063124770]
+tile_set = ExtResource("9")
+
 [node name="TileMapLayerAbove" type="TileMapLayer" parent="Environment" unique_id=1234567892]
 modulate = Color(1, 1, 1, 0.46666667)
 z_index = 1
@@ -105,6 +108,7 @@ y_sort_enabled = true
 script = ExtResource("5")
 
 [node name="CanvasModulate" type="CanvasModulate" parent="." unique_id=948490815]
+visible = false
 light_mask = 1048575
 visibility_layer = 1048575
 color = Color(0.69140625, 0.69140625, 0.69140625, 1)

src/scripts/attack_spell_frostspike.gd

@@ -58,7 +58,11 @@ func _spawn_adjacent_after_delay() -> void:
 		var sp = scene.instantiate()
 		sp.setup(pos, player_owner, damage, false, 1.0, 1.0, true)
 		par.add_child(sp)
-	# Third wave: center again, 2x scale, 2x damage (most damage)
+	# Wait for the 4 adjacent spikes to finish (0.25s), then spawn third-wave center
+	await get_tree().create_timer(0.25).timeout
+	if not is_instance_valid(self):
+		return
+	# Third wave: center again, 2x scale, 2x damage (most damage) — only after 4 finish
 	var third = scene.instantiate()
 	third.setup(global_position, player_owner, damage, false, 2.0, 2.0, true)
 	par.add_child(third)

src/scripts/game_world.gd

@@ -2382,12 +2382,12 @@ func _update_fog_of_war(delta: float) -> void:
 			var s = dungeon_data.stairs
 			if s.has("x") and s.has("y") and s.has("w") and s.has("h"):
 				exit_tile = Vector2i(s.x + s.w / 2, s.y + s.h / 2)
-				for dx in range(s.w):
-					for dy in range(s.h):
-						var tx := s.x + dx
-						var ty := s.y + dy
+				for dx in range(int(s.w)):
+					for dy in range(int(s.h)):
+						var tx: int = int(s.x) + dx
+						var ty: int = int(s.y) + dy
 						if tx >= 0 and ty >= 0 and tx < map_size.x and ty < map_size.y:
-							var idx := tx + ty * map_size.x
+							var idx: int = tx + ty * map_size.x
 							if idx >= 0 and idx < explored_map.size() and explored_map[idx] != 0:
 								exit_discovered = true
 								break