diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index 26019d6..adb21be 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -2047,3 +2047,31 @@ void Creature::FindLocation()
         FindLocationWithTarget(target);
     }
 }
+
+bool Creature::Attackable(Room* room)
+{
+    if (dead) {
+        return false;
+    }
+    if (a8::HasBitFlag(status, CS_Disable)) {
+        return false;
+    }
+    if (IsInvincible()) {
+        return false;
+    }
+    if (HasBuffEffect(kBET_Hide)) {
+        return false;
+    }
+    if (HasBuffEffect(kBET_Driver)) {
+        return false;
+    }
+    if (HasBuffEffect(kBET_Passenger)) {
+        return false;
+    }
+    return true;
+}
+
+bool Creature::ReceiveExplosionDmg(Explosion* explosion)
+{
+    return true;
+}
diff --git a/server/gameserver/creature.h b/server/gameserver/creature.h
index 2dcfa67..9733280 100644
--- a/server/gameserver/creature.h
+++ b/server/gameserver/creature.h
@@ -84,6 +84,8 @@ class Creature : public MoveableEntity
     virtual void RemoveObjects(Entity* entity) {};
     virtual void AddOutObjects(Entity* entity) {};
     virtual void RemoveOutObjects(Entity* entity) {};
+    virtual bool Attackable(Room* room) override;
+    virtual bool ReceiveExplosionDmg(Explosion* explosion) override;
     bool HasBuffEffect(int buff_effect_id);
     Buff* GetBuffByEffectId(int effect_id);
     Buff* GetBuffById(int buff_id);
diff --git a/server/gameserver/entity.h b/server/gameserver/entity.h
index 1494a16..e4e0d77 100644
--- a/server/gameserver/entity.h
+++ b/server/gameserver/entity.h
@@ -38,6 +38,8 @@ class Entity
     virtual void OnAddToTargetPartObject(Entity* target) {};
     virtual void OnRemoveFromTargetPartObject(Entity* target) {};
     virtual bool CanSeeMe(Human* hum) { return true; };
+    virtual bool Attackable(Room* room) { return false; };
+    virtual bool ReceiveExplosionDmg(Explosion* explosion) { return false; };
     int GetUniId() const { return uniid_; }
     EntityType_e GetEntityType() const { return entity_type_; }
     EntitySubType_e GetEntitySubType() const { return entity_subtype_; }
diff --git a/server/gameserver/explosion.cc b/server/gameserver/explosion.cc
index 4fe45cf..0f567e8 100644
--- a/server/gameserver/explosion.cc
+++ b/server/gameserver/explosion.cc
@@ -1,110 +1,115 @@
 #include "precompile.h"
 
 #include "explosion.h"
+#include "creature.h"
+#include "room.h"
+
+enum ExplosionType_e
+{
+    kExplosionIndifference = 1,
+    kExplosionEnemyAndObstacle = 2
+};
 
 void Explosion::IndifferenceAttack(Room* room,
                                    const a8::Vec2& center,
-                                   float range,
+                                   float explosion_range,
                                    int explosion_effect,
-                                   float dmg)
+                                   float dmg,
+                                   long long special_damage_type)
 {
-#if 0
-    if (meta->i->explosion_range() <= 0) {
-        return;
-    }
-    std::set<Creature*> objects;
-    TraverseProperTargetsNoTeammate
-        (
-         [this, &objects, team_id] (Creature* c, bool& stop)
-         {
-             float distance = (c->GetPos() - GetPos()).Norm();
-             if (distance < meta->i->explosion_range()) {
-                 objects.insert(c);
-             }
-         });
-    room->frame_event.AddExplosionEx(GetWeakPtrRef(),
-                                     0,
-                                     GetPos(),
-                                     meta->i->explosion_effect());
-    for (auto& target : objects) {
-        switch (target->GetEntityType()) {
-        case ET_Player:
-            {
-                Human* hum = (Human*)target;
-                if (!hum->dead) {
-                    float dmg = meta->i->atk();
-                    float def = hum->ability.def;
-                    float finaly_dmg = dmg * (1 - def/MetaMgr::Instance()->K);
-                    hum->DecHP(finaly_dmg, VP_Mine, TEXT("battle_server_killer_mine", "地雷"), VW_Mine);
-                }
-            }
-            break;
-        default:
-            {
-            }
-            break;
-        }
-    }
-#endif
+    type_ = kExplosionIndifference;
+    room_ = room;
+    explosion_range_ = explosion_range;
+    explosion_effect_ = explosion_effect;
+    dmg_ = dmg;
+    center_ = center;
+    special_damage_type_ = special_damage_type;
+    InternalAttack();
 }
 
 void Explosion::EnemyAndObstacleAttack(CreatureWeakPtr& sender,
                                        const a8::Vec2& center,
-                                       float range,
+                                       float explosion_range,
                                        int explosion_effect,
-                                       float dmg)
+                                       float dmg,
+                                       long long special_damage_type)
 {
-    #if 0
     if (!sender.Get()) {
         return;
     }
+    type_ = kExplosionEnemyAndObstacle;
+    room_ = sender.Get()->room;
+    sender_ = sender;
+    explosion_range_ = explosion_range;
+    explosion_effect_ = explosion_effect;
+    dmg_ = dmg;
+    center_ = center;
+    special_damage_type_ = special_damage_type;
+    InternalAttack();
+}
 
-    if (follow_target.Get()) {
-        bomb_pos = follow_target.Get()->GetPos();
+void Explosion::InternalAttack()
+{
+    if (explosion_range_ <= 0) {
+        return;
     }
-    room->frame_event.AddExplosionEx(sender,
-                                     meta->i->id(),
-                                     bomb_pos,
-                                     gun_meta->i->explosion_effect());
+    sender_.Get()->room->frame_event.AddExplosionEx
+        (sender_,
+         0,
+         center_,
+         explosion_effect_);
     std::set<GridCell*> grid_list;
-    sender.Get()->room->grid_service->GetAllCellsByXy
+    sender_.Get()->room->grid_service->GetAllCellsByXy
         (
-         sender.Get()->room,
-         bomb_pos.x,
-         bomb_pos.y,
+         room_,
+         center_.x,
+         center_.y,
          grid_list
          );
-    std::set<Creature*> objects;
-    sender.Get()->room->grid_service->TraverseCreatures
+    std::set<Entity*> objects;
+    room_->grid_service->TraverseCreatures
         (
-         sender.Get()->room->GetRoomIdx(),
+         room_->GetRoomIdx(),
          grid_list,
          [this, &objects] (Creature* c, bool& stop)
          {
-             if (sender.Get()->IsProperTarget(c)) {
-                 if (bomb_pos.Distance(c->GetPos()) < meta->i->explosion_range()) {
+             if (!c->Attackable(room_)) {
+                 return;
+             }
+             if (!c->ReceiveExplosionDmg(this)) {
+                 return;
+             }
+             if (type_ == kExplosionEnemyAndObstacle) {
+                 if (sender_.Get()->IsProperTarget(c)) {
+                     if (center_.Distance(c->GetPos()) < explosion_range_) {
+                         objects.insert(c);
+                     }
+                 }
+             } else {
+                 if (center_.Distance(c->GetPos()) < explosion_range_) {
                      objects.insert(c);
                  }
              }
          }
          );
-    std::set<Entity*> entitys;
-    sender.Get()->room->grid_service->TraverseAllLayerEntityList
+    room_->grid_service->TraverseAllLayerEntityList
         (
-         sender.Get()->room->GetRoomIdx(),
+         room_->GetRoomIdx(),
          grid_list,
-         [this, &entitys] (Entity* entity, bool& stop)
+         [this, &objects] (Entity* entity, bool& stop)
          {
+             if (!entity->Attackable(room_)) {
+                 return;
+             }
+             if (!entity->ReceiveExplosionDmg(this)) {
+                 return;
+             }
+             if (center_.Distance(entity->GetPos()) < explosion_range_) {
+                 objects.insert(entity);
+             }
          }
          );
-
-    Explosion explosion;
     for (auto& target : objects) {
-        target->OnExplosionHit(&explosion);
+        target->OnExplosionHit(this);
     }
-
-    for (auto& target : entitys) {
-        target->OnExplosionHit(&explosion);
-    }
-    #endif
 }
diff --git a/server/gameserver/explosion.h b/server/gameserver/explosion.h
index 414697e..92b3966 100644
--- a/server/gameserver/explosion.h
+++ b/server/gameserver/explosion.h
@@ -6,14 +6,34 @@ class Room;
 class Explosion
 {
  public:
+
+    Room* GetRoom() { return room_; };
+    CreatureWeakPtr GetSender() { return sender_; };
+    float GetDmg() { return dmg_; };
+    long long GetSpecialDamageType() { return special_damage_type_; };
+
     void IndifferenceAttack(Room* room,
                             const a8::Vec2& center,
-                            float range,
+                            float explosion_range,
                             int explosion_effect,
-                            float dmg);
+                            float dmg,
+                            long long special_damage_type = 0);
     void EnemyAndObstacleAttack(CreatureWeakPtr& sender,
                                 const a8::Vec2& center,
-                                float range,
+                                float explosion_range,
                                 int explosion_effect,
-                                float dmg);
+                                float dmg,
+                                long long special_damage_type = 0);
+ private:
+    void InternalAttack();
+
+ private:
+    int type_ = 0;
+    Room* room_ = nullptr;
+    CreatureWeakPtr sender_;
+    float explosion_range_ = 0;
+    int explosion_effect_ = 0;
+    float dmg_ = 0;
+    a8::Vec2 center_;
+    long long special_damage_type_ = 0;
 };
diff --git a/server/gameserver/obstacle.cc b/server/gameserver/obstacle.cc
index 6297a3e..0543db4 100644
--- a/server/gameserver/obstacle.cc
+++ b/server/gameserver/obstacle.cc
@@ -536,40 +536,28 @@ void Obstacle::OnBulletHit(Bullet* bullet)
 
 void Obstacle::OnExplosionHit(Explosion* e)
 {
+    if (meta->i->explosion_hit() == kExplosionHitEatDmg) {
+        return;
+    }
+    float dmg = e->GetDmg();
+    float def = 0;
+    float finaly_dmg = dmg * (1 - def/MetaMgr::Instance()->K);
+    SetHealth(e->GetRoom(), std::max(0.0f, GetHealth(e->GetRoom()) - finaly_dmg));
+    if (GetHealth(e->GetRoom()) <= 0.01f) {
+        Die(e->GetRoom());
+    }
+    if (IsDead(e->GetRoom())) {
+        if (meta->i->damage_dia() > 0.01f &&
+            meta->i->damage() > 0.01f) {
 #if 0
-        if (!target->IsEntityType(Obstacle)) {
-            continue;
-        }
-        Obstacle* obstacle = (Obstacle*)target;
-        if (obstacle->IsDead(room)) {
-            continue;
-        }
-        if (obstacle->meta->i->explosion_hit() == kExplosionHitPass ||
-            obstacle->meta->i->explosion_hit() == kExplosionHitEatDmg) {
-            continue;
-        }
-        if (obstacle->Attackable(sender.Get()) &&
-            !obstacle->IsTerminatorAirDropBox(room)) {
-            float dmg = GetAtk() * (1 + sender.Get()->GetAttrRate(kHAT_Atk)) +
-                sender.Get()->GetAttrAbs(kHAT_Atk);
-            float def = 0;
-            float finaly_dmg = dmg * (1 - def/MetaMgr::Instance()->K);
-            obstacle->SetHealth(room, std::max(0.0f, obstacle->GetHealth(room) - finaly_dmg));
-            if (obstacle->GetHealth(room) <= 0.01f) {
-                obstacle->Die(room);
-            }
-            if (obstacle->IsDead(room)) {
-                if (obstacle->meta->i->damage_dia() > 0.01f &&
-                    obstacle->meta->i->damage() > 0.01f) {
-                    #if 0
-                    obstacle->Explosion(this);
-                    #endif
-                }
-                sender.Get()->DropItems(obstacle);
-            }
-            obstacle->BroadcastFullState(room);
-        }
+            obstacle->Explosion(this);
 #endif
+        }
+        #if 0
+        sender.Get()->DropItems(obstacle);
+        #endif
+    }
+    BroadcastFullState(e->GetRoom());
 }
 
 bool Obstacle::CanThroughable(Creature* c)
@@ -784,3 +772,46 @@ bool Obstacle::IsHalfWallCollider()
     return meta->i->collision_hit() == kCollisionHitPass &&
         meta->i->bullet_hit() != kBulletHitPass;
 }
+
+bool Obstacle::Attackable(Room* room)
+{
+    if (IsDead(room)) {
+        return false;
+    }
+    return true;
+}
+
+bool Obstacle::ReceiveExplosionDmg(Explosion* explosion)
+{
+    switch (meta->i->explosion_hit()) {
+    case kExplosionHitPass:
+        {
+            return false;
+        }
+        break;
+    case kExplosionHitAnyDmg:
+        {
+            return true;
+        }
+        break;
+    case kExplosionHitOnlySpecDmg:
+        {
+            if (meta->receive_special_damage_type == 0) {
+                return true;
+            }
+            return (meta->receive_special_damage_type & explosion->GetSpecialDamageType()) != 0;
+        }
+        break;
+    case kExplosionHitEatDmg:
+        {
+            return false;
+        }
+        break;
+    default:
+        {
+            return false;
+        }
+        break;
+    }
+    return false;
+}
diff --git a/server/gameserver/obstacle.h b/server/gameserver/obstacle.h
index 2f4288a..c5474f2 100644
--- a/server/gameserver/obstacle.h
+++ b/server/gameserver/obstacle.h
@@ -43,12 +43,14 @@ class Obstacle : public Entity
     virtual void OnPreCollision(Room* room) override;
     virtual void OnBulletHit(Bullet* bullet) override;
     virtual void OnExplosionHit(Explosion* explosion) override;
+    virtual bool Attackable(Room* room) override;
     virtual bool IsTerminatorAirDropBox(Room* room) { return false; }
     virtual bool CanThroughable(Creature* c);
     virtual bool CanThroughable(Bullet* bullet);
     virtual bool DoInteraction(Human* sender);
     virtual void OnCollisionTrigger(Creature* c, OptResult& opt_result);
     virtual bool CanSeeMe(Human* hum);
+    virtual bool ReceiveExplosionDmg(Explosion* explosion) override;
     void SetDoorInfo(Building* building, int door_id_x);
     bool IsDoor();
     DoorState_e GetDoorState(Room* room);
diff --git a/third_party/a8engine b/third_party/a8engine
index b16f9a6..8932713 160000
--- a/third_party/a8engine
+++ b/third_party/a8engine
@@ -1 +1 @@
-Subproject commit b16f9a6176bfac30c0e7d29ec6df37e750fd1c60
+Subproject commit 8932713766a5c0289966f08a5a0153a1ae493a9d