diff --git a/scenes/game.tscn b/scenes/game.tscn
index a654714..0d0d4b3 100644
--- a/scenes/game.tscn
+++ b/scenes/game.tscn
@@ -4,15 +4,31 @@
 [ext_resource type="Script" uid="uid://cphrdy0xexx30" path="res://scenes/game.gd" id="1_vtaks"]
 [ext_resource type="PackedScene" uid="uid://7vohdw0xop0g" path="res://scenes/worldborder.tscn" id="2_dinhu"]
 [ext_resource type="Script" uid="uid://coplu13jpw4xq" path="res://scripts/camera_2d.gd" id="3_kvpfn"]
+[ext_resource type="Script" uid="uid://b4jrogrq54c8f" path="res://scripts/SpawnEntry.gd" id="6_ir15t"]
 [ext_resource type="Script" uid="uid://dovkm6w8af08x" path="res://scripts/spawn_control.gd" id="6_p57ef"]
+[ext_resource type="PackedScene" uid="uid://ccotbw7gepsge" path="res://scenes/slime.tscn" id="7_ca42v"]
 [ext_resource type="Texture2D" uid="uid://c4i3fnr6gpjp" path="res://assets/tileset/Tiled_files/details.png" id="7_gee14"]
 [ext_resource type="PackedScene" uid="uid://b4v0ntaukg2je" path="res://scenes/witch.tscn" id="7_u5sy4"]
 [ext_resource type="Texture2D" uid="uid://0xu8ohipv2mj" path="res://assets/tileset/Tiled_files/Objects.png" id="8_0tnpc"]
+[ext_resource type="PackedScene" uid="uid://cj83ht5o2l8c1" path="res://scenes/blue_slime.tscn" id="8_rysoc"]
 [ext_resource type="PackedScene" uid="uid://cgu7w2jd42f3a" path="res://scenes/tile_map_layer(background).tscn" id="8_vtaks"]
 [ext_resource type="PackedScene" uid="uid://bgpsc6dvsn7ak" path="res://scenes/tile_map_layer(objects).tscn" id="9_kvpfn"]
 [ext_resource type="PackedScene" uid="uid://co8t1fr3b3kub" path="res://scenes/tile_map_layer(overlay).tscn" id="10_dinhu"]
 [ext_resource type="Script" uid="uid://ckv6prbe1o7s1" path="res://scripts/drop_manager.gd" id="10_vtaks"]
 
+[sub_resource type="Resource" id="Resource_ssvqc"]
+script = ExtResource("6_ir15t")
+weight = 1.0
+enemy = ExtResource("7_ca42v")
+metadata/_custom_type_script = "uid://b4jrogrq54c8f"
+
+[sub_resource type="Resource" id="Resource_264po"]
+script = ExtResource("6_ir15t")
+min_time = 10.0
+weight = 0.5
+enemy = ExtResource("8_rysoc")
+metadata/_custom_type_script = "uid://b4jrogrq54c8f"
+
 [sub_resource type="TileSetAtlasSource" id="TileSetAtlasSource_vtaks"]
 texture = ExtResource("7_gee14")
 1:1/0 = 0
@@ -2362,6 +2378,7 @@ anchors_preset = 0
 offset_right = 40.0
 offset_bottom = 40.0
 script = ExtResource("6_p57ef")
+spawn_entries = Array[ExtResource("6_ir15t")]([SubResource("Resource_ssvqc"), SubResource("Resource_264po")])
 
 [node name="SpawnTimer" type="Timer" parent="." unique_id=1852920556]
 wait_time = 0.203
diff --git a/scripts/SpawnEntry.gd b/scripts/SpawnEntry.gd
new file mode 100644
index 0000000..60389af
--- /dev/null
+++ b/scripts/SpawnEntry.gd
@@ -0,0 +1,5 @@
+extends Resource
+class_name SpawnEntry
+@export var min_time: float
+@export var weight: float
+@export var enemy: PackedScene
diff --git a/scripts/SpawnEntry.gd.uid b/scripts/SpawnEntry.gd.uid
new file mode 100644
index 0000000..92e6da7
--- /dev/null
+++ b/scripts/SpawnEntry.gd.uid
@@ -0,0 +1 @@
+uid://b4jrogrq54c8f
diff --git a/scripts/spawn_control.gd b/scripts/spawn_control.gd
index 06d1ceb..cd4f46d 100644
--- a/scripts/spawn_control.gd
+++ b/scripts/spawn_control.gd
@@ -5,6 +5,8 @@ var down_right
 var up_right
 var down_left
 var viewport_rect
+var elapsed_time = 0.0
+@export var spawn_entries: Array[SpawnEntry]
 
 func _ready() -> void:
 	var camera: Camera2D = get_parent().get_node("Camera2D")
@@ -16,6 +18,7 @@ func _ready() -> void:
 	down_right = world_origin + world_size
 	up_right = Vector2(down_right.x, up_left.y)
 	down_left = Vector2(up_left.x, down_right.y)
+	
 
 func get_spawn_position() -> Vector2:
 	var side = randi() % 4
@@ -40,15 +43,28 @@ func get_spawn_position() -> Vector2:
 	return Vector2(spawn_x, spawn_y)
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(delta: float) -> void:
-	
+	elapsed_time += delta
 	pass
 
 func spawn_enemy() -> void:
-	var enemy_scene = preload("res://scenes/blue_slime.tscn")
-	var enemy = enemy_scene.instantiate()
+	var sum_weight = 0.0
+	var available = []
+	for entry in spawn_entries:
+		if entry.min_time <= elapsed_time:
+			available.append(entry)
+			sum_weight += entry.weight
+	var roll = randf() * sum_weight
+	var winner = null
+	for entry in available:
+		roll -= entry.weight
+		if roll <= 0:
+			winner = entry
+			break
+	if winner == null:
+		return
+	var enemy = winner.enemy.instantiate()
 	enemy.global_position = get_spawn_position()
 	add_child(enemy)
-	pass
 
 
 func _on_spawn_timer_timeout() -> void: