diff --git a/server/gameserver/bullet.cc b/server/gameserver/bullet.cc
index 47dec281..73423044 100644
--- a/server/gameserver/bullet.cc
+++ b/server/gameserver/bullet.cc
@@ -809,9 +809,19 @@ void Bullet::ProcFlyHook(Entity* target)
     if (target->IsCreature(room)) {
         Creature* c = (Creature*)target;
         room->frame_event.AddPropChg(c->GetWeakPtrRef(), kPropBeHook, 0, sender.Get()->GetUniId());
-        c->AutoNavigation(born_pos, gun_meta->i->bullet_speed() * 2);
+        int buff_uniid = c->TryAddBuff(c, gun_meta->i->buffid());
+        c->AutoNavigation(born_pos, gun_meta->i->bullet_speed() * 2,
+                          [buff_uniid] (Creature* c)
+                          {
+                              c->RemoveBuffByUniId(buff_uniid);
+                          }
+                          );
     } else {
-        sender.Get()->AutoNavigation(GetPos(), gun_meta->i->bullet_speed() * 2);
+        sender.Get()->AutoNavigation(GetPos(), gun_meta->i->bullet_speed() * 2,
+                                     [] (Creature* c)
+                                     {
+
+                                     });
     }
 
     sender.Get()->IncDisableMoveTimes();
diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index 0ce13f2c..5ee4f5a6 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -3616,7 +3616,8 @@ void Creature::_UpdateSpecMove()
     }
 }
 
-void Creature::AutoNavigation(a8::Vec2 target_pos, float speed)
+void Creature::AutoNavigation(a8::Vec2 target_pos, float speed,
+                              std::function<void (Creature*)> cb)
 {
     float distance = GetPos().Distance(target_pos);
     if (distance < 0.001f) {
diff --git a/server/gameserver/creature.h b/server/gameserver/creature.h
index 5e28151a..6f166c3a 100644
--- a/server/gameserver/creature.h
+++ b/server/gameserver/creature.h
@@ -278,7 +278,8 @@ class Creature : public MoveableEntity
     float GetAttrAbs(int attr_id);
     float GetAttrRate(int attr_id);
     void RecalcDtoAttr();
-    void AutoNavigation(a8::Vec2 target_pos, float speed);
+    void AutoNavigation(a8::Vec2 target_pos, float speed,
+                        std::function<void (Creature*)> cb);
     void AddTraceBullet(int bullet_uniid, int target_uniid, int gun_id);
     void LockAttackDir(int time);