diff --git a/client/webapp/index.html b/client/webapp/index.html
--- a/client/webapp/index.html
+++ b/client/webapp/index.html
@@ -142,6 +142,9 @@
   <script src="js/engine/monster_loot_dropper.js"></script>
   <script src="js/engine/combat_skills.js"></script>
   <script src="js/engine/monster_system.js"></script>
+  <script type="module" src="js/data/wilderness_zone_packs.js"></script>
+  <script type="module" src="js/engine/monster_pack_system.js"></script>
+  <script type="module" src="js/engine/ambush_trigger_system.js"></script>
   <script src="js/engine/world_renderer.js"></script>
   <script src="js/engine/vfx_renderer.js"></script>
   <script src="js/engine/animation_engine.js"></script>
diff --git a/client/webapp/js/engine/entity_renderer.js b/client/webapp/js/engine/entity_renderer.js
--- a/client/webapp/js/engine/entity_renderer.js
+++ b/client/webapp/js/engine/entity_renderer.js
@@ -122,6 +122,11 @@
           ctx.ellipse(mPos.x, mPos.y + 4, shadowRx, shadowRy, 0, 0, Math.PI * 2);
           ctx.fill();
 
+          // Render Pack Leader Pulsating Ground Aura Decal (PoE2 Standards)
+          if (m.isPackLeader && typeof window.renderLeaderAuraDecal === 'function') {
+            window.renderLeaderAuraDecal(ctx, m, mPos.x, mPos.y, (window.gameTimeSec || Date.now() * 0.001));
+          }
+
           let drawnAnimatedMob = false;
           if (typeof AnimationEngine !== 'undefined' && m.anim) {
             drawnAnimatedMob = AnimationEngine.drawEntityFrame(
diff --git a/server/world/hideout_engine.py b/server/world/hideout_engine.py
--- a/server/world/hideout_engine.py
+++ b/server/world/hideout_engine.py
@@ -269,7 +269,8 @@
     def enter_map_portal(
         self,
         player_id: str,
-        portal_index: Optional[int] = None
+        portal_index: Optional[int] = None,
+        zone_engine: Optional[Any] = None,
     ) -> Tuple[bool, str, Optional[Dict[str, Any]]]:
         """
         Enters an active Map Device portal.
@@ -312,7 +313,11 @@
 
         # If exhausted all 6 portals, close device
         if dev.portals_remaining == 0:
+            if zone_engine is not None and hasattr(zone_engine, "active_instances"):
+                zone_engine.active_instances.pop(dev.active_instance_id, None)
+            dev.active_instance_id = None
             dev.active_map = None
             msg = f"Đã bước qua cổng #{target_idx + 1}. Đây là CỔNG CUỐI CÙNG (0/6)! Tinh Đồ Nghi đã khép lại."
         else:
             msg = f"Đã bước qua cổng #{target_idx + 1}. Còn lại {dev.portals_remaining}/6 Cổng Tinh Đồ."