diff --git a/assets/animations.json b/assets/animations.json
index 9540dd0..5cdbc6e 100644
--- a/assets/animations.json
+++ b/assets/animations.json
@@ -111,12 +111,22 @@
   },
   "test_boss": {
     "_type": "Animation",
-    "easing": 3,
+    "easing": 1,
     "ease_rate": 0.5,
     "scale": 0.4,
     "simple": true,
     "frames": 1,
     "speed": 0.02,
     "stationary": true
+  },
+  "rat_king_boss": {
+    "_type": "Animation",
+    "easing": 1,
+    "ease_rate": 0.5,
+    "scale": 0.4,
+    "simple": false,
+    "frames": 2,
+    "speed": 0.02,
+    "stationary": true
   }
 }
diff --git a/assets/bosses.json b/assets/bosses.json
index ade597e..c6f8ff0 100644
--- a/assets/bosses.json
+++ b/assets/bosses.json
@@ -2,23 +2,23 @@
   "RAT_KING": {
     "components": [
       {"_type": "BossFight",
-        "background": "test_background",
-        "floor": "test_floor",
-        "floor_pos": "floor2",
+        "background": "boss_fight_background",
+        "floor": "devils_fingers_background",
+        "floor_pos": "floor1",
         "player": {
-          "sprite": "test_player",
+          "sprite": "peasant_girl_rear_view",
           "start_pos": "player2",
           "scale": 0.5,
           "mid_cell": false
         },
         "boss":  {
-          "start_pos": "boss3",
+          "start_pos": "boss2",
           "scale": 0.7,
           "mid_cell": true
         }
       },
       {"_type": "Combat", "hp": 20, "max_hp": 20, "damage": 20, "dead": false},
-      {"_type": "Sprite", "name": "test_boss", "width": 720, "height": 720, "scale": 0.8, "stationary": false},
+      {"_type": "Sprite", "name": "rat_king_boss", "width": 720, "height": 720, "scale": 0.8, "stationary": false},
       {"_type": "Sound", "attack": "Marmot_Scream_1", "death": "Creature_Death_1"}
     ]
   }
diff --git a/boss/fight.cpp b/boss/fight.cpp
index 654982c..a2e44ef 100644
--- a/boss/fight.cpp
+++ b/boss/fight.cpp
@@ -88,9 +88,6 @@ namespace boss {
         boss::System::combat(attack_id);
         state(State::PLAYER_TURN);
        } break;
-      case TICK:
-        $ui.play_animations();
-        break;
       default:
         break;
         // skip it
@@ -107,15 +104,12 @@ namespace boss {
         break;
       case ATTACK: {
         $ui.status(L"BOSS TURN");
-        $ui.move_boss(run % 10 < 5 ? "boss1" : "boss3");
+        $ui.move_boss(run % 10 < 5 ? "boss1" : "boss2");
         $ui.$boss_anim.play();
         int attack_id = std::any_cast<int>(data);
         boss::System::combat(attack_id);
         state(State::BOSS_TURN);
        } break;
-      case TICK:
-        $ui.play_animations();
-        break;
       default:
         // skip it
         break;
@@ -134,5 +128,6 @@ namespace boss {
 
   void Fight::render(sf::RenderWindow& window) {
     $ui.render(window);
+    $ui.play_animations(window);
   }
 }
diff --git a/boss/ui.cpp b/boss/ui.cpp
index 892ec69..2c29472 100644
--- a/boss/ui.cpp
+++ b/boss/ui.cpp
@@ -2,6 +2,8 @@
 #include "constants.hpp"
 #include "components.hpp"
 #include "animation.hpp"
+#include <chrono>
+#include <thread>
 
 namespace boss {
   using namespace guecs;
@@ -16,7 +18,9 @@ namespace boss {
     $boss_sprite = textures::get_sprite(sprite.name);
 
     // floor is std::optional
-    $floor_sprite = textures::get_sprite(*$scene.floor);
+    if($scene.floor) {
+      $floor_sprite = textures::get_sprite(*$scene.floor);
+    }
 
     $player_sprite = textures::get_sprite($scene.player["sprite"]);
 
@@ -41,7 +45,10 @@ namespace boss {
 
     move_boss($scene.boss["start_pos"]);
     move_player($scene.player["start_pos"]);
-    position_sprite($floor_sprite, $scene.floor_pos, 1.0, false);
+
+    if($scene.floor) {
+      position_sprite($floor_sprite, $scene.floor_pos, 1.0, false);
+    }
 
     $arena.init();
 
@@ -78,7 +85,10 @@ namespace boss {
     $combat_ui.render(window);
     $arena.render(window);
 
-    window.draw(*$floor_sprite.sprite);
+    if($floor_sprite.sprite) {
+      window.draw(*$floor_sprite.sprite);
+    }
+
     window.draw(*$boss_sprite.sprite);
     window.draw(*$player_sprite.sprite);
 
@@ -106,9 +116,14 @@ namespace boss {
     position_sprite($player_sprite, cell_name, $scene.player["scale"], $scene.player["mid_cell"]);
   }
 
-  void UI::play_animations() {
-    if($boss_anim.playing) {
+  void UI::play_animations(sf::RenderWindow& window) {
+    using namespace std::chrono_literals;
+
+    while($boss_anim.playing) {
       animation::apply($boss_anim, *$boss_sprite.sprite, $boss_pos);
+      render(window);
+      window.display();
+      std::this_thread::sleep_for(16ms);
     }
   }
 }
diff --git a/boss/ui.hpp b/boss/ui.hpp
index f701f58..5423329 100644
--- a/boss/ui.hpp
+++ b/boss/ui.hpp
@@ -34,6 +34,6 @@ namespace boss {
     void status(const std::wstring& msg);
     void move_boss(const std::string& cell_name);
     void move_player(const std::string& cell_name);
-    void play_animations();
+    void play_animations(sf::RenderWindow& window);
   };
 }