diff --git a/server/gameserver/buff/cond_add.cc b/server/gameserver/buff/cond_add.cc
index 36ca6891..7a5f34ab 100644
--- a/server/gameserver/buff/cond_add.cc
+++ b/server/gameserver/buff/cond_add.cc
@@ -15,9 +15,56 @@
 
 void CondAddBuff::Activate()
 {
+    switch ((CondAddBuff_e)meta->_int_buff_param1) {
+    case CondAddBuff_e::kBulletHit:
+        {
+            ProcBulletHit();
+        }
+        break;
+    case CondAddBuff_e::kBulletKill:
+        {
+            ProcBulletKill();
+        }
+        break;
+    case CondAddBuff_e::kBulletEnd:
+        {
+            ProcBulletEnd();
+        }
+        break;
+    }
 }
 
 void CondAddBuff::Deactivate()
+{
+    for (auto handler : handlers_) {
+        if (!handler.expired()) {
+            owner->GetTrigger()->RemoveEventHandler(handler);
+        }
+    }
+    handlers_.clear();
+}
+
+
+void CondAddBuff::ProcBulletHit()
+{
+    handlers_.push_back
+        (
+         owner->GetTrigger()->AddListener
+         (
+          kBulletHitEvent,
+          [] (const a8::Args& args)
+          {
+
+          })
+         );
+}
+
+void CondAddBuff::ProcBulletKill()
+{
+
+}
+
+void CondAddBuff::ProcBulletEnd()
 {
 
 }
diff --git a/server/gameserver/buff/cond_add.h b/server/gameserver/buff/cond_add.h
index fe20edc5..10b53645 100644
--- a/server/gameserver/buff/cond_add.h
+++ b/server/gameserver/buff/cond_add.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include "buff.h"
-
+#include "trigger.h"
 
 A8_DECLARE_CLASS_ENUM(CondAddBuff_e, int,
                       kBulletHit = 11,
@@ -17,4 +17,13 @@ class CondAddBuff : public Buff
     virtual void Activate() override;
     virtual void Deactivate() override;
 
+ private:
+
+    void ProcBulletHit();
+    void ProcBulletKill();
+    void ProcBulletEnd();
+
+ private:
+    std::vector<std::weak_ptr<EventHandlerPtr>> handlers_;
+
 };