diff --git a/server/gameserver/ability.cc b/server/gameserver/ability.cc
index 74ca502e..ed9af170 100644
--- a/server/gameserver/ability.cc
+++ b/server/gameserver/ability.cc
@@ -199,40 +199,6 @@ void Ability::Clear()
 
 }
 
-void Ability::AddSpeedAddition(float rate)
-{
-    speed_addition_rate_ += rate;
-    ++speed_addition_times_;
-}
-
-void Ability::DelSpeedAddition(float rate)
-{
-    speed_addition_rate_ -= rate;
-    speed_addition_rate_ = std::max(0.0f, speed_addition_rate_);
-    --speed_addition_times_;
-#ifdef DEBUG
-    if (speed_addition_times_ < 0) {
-        abort();
-    }
-#endif
-}
-
-float Ability::GetSpeedAddition()
-{
-    return speed_addition_rate_;
-}
-
-int Ability::GetSpeedAdditionTimes()
-{
-    return speed_addition_times_;
-}
-
-void Ability::AddDmgRuduce(float rate)
-{
-    dmg_ruduce_rate_ += rate;
-    ++dmg_ruduce_times_;
-}
-
 void Ability::DelDmgRuduce(float rate)
 {
     dmg_ruduce_rate_ -= rate;
@@ -409,28 +375,6 @@ int Ability::GetDisableUseSkillTimes()
     return disable_useskill_times_;
 }
 
-void Ability::SetFixedSpeed(float speed)
-{
-    fixed_speed_ = speed;
-    ++fixed_speed_times_;
-}
-
-void Ability::UnSetFixedSpeed()
-{
-    fixed_speed_ = 0.0f;
-    fixed_speed_times_ = 0;
-}
-
-int Ability::GetFixedSpeedTimes()
-{
-    return fixed_speed_times_;
-}
-
-float Ability::GetFixedSped()
-{
-    return fixed_speed_;
-}
-
 AttrAbsHandle Ability::AddAttrAbs(int attr_id, float value)
 {
     if (IsValidHumanAttr(attr_id)) {
@@ -660,3 +604,9 @@ float Ability::GetAttrRuduce(int attr_id)
         return 0.0f;
     }
 }
+
+void Ability::AddDmgRuduce(float rate)
+{
+    dmg_ruduce_rate_ += rate;
+    ++dmg_ruduce_times_;
+}
diff --git a/server/gameserver/ability.h b/server/gameserver/ability.h
index 80a3c493..f8a483bd 100644
--- a/server/gameserver/ability.h
+++ b/server/gameserver/ability.h
@@ -16,11 +16,6 @@ class Ability
  public:
     Ability(CreatureWeakPtr owner);
 
-    void AddSpeedAddition(float rate);
-    void DelSpeedAddition(float rate);
-    float GetSpeedAddition();
-    int GetSpeedAdditionTimes();
-
     void AddDmgRuduce(float rate);
     void DelDmgRuduce(float rate);
     float GetDmgRuduce();
@@ -53,11 +48,6 @@ class Ability
     void DecDisableUseSkillTimes();
     int GetDisableUseSkillTimes();
 
-    void SetFixedSpeed(float speed);
-    void UnSetFixedSpeed();
-    int GetFixedSpeedTimes();
-    float GetFixedSped();
-
     AttrAbsHandle AddAttrAbs(int attr_id, float value);
     void RemoveAttrAbs(AttrAbsHandle handle);
     AttrRateHandle AddAttrRate(int attr_id, float value);
@@ -89,9 +79,6 @@ private:
     std::array<std::tuple<float, list_head>, kHVAT_End - kHVAT_Begin> vattr_add_ = {};
     std::array<std::tuple<float, list_head>, kHVAT_End - kHVAT_Begin> vattr_dec_ = {};
 
-    int speed_addition_times_ = 0;
-    float speed_addition_rate_ = 0;
-
     int dmg_ruduce_times_ = 0;
     float dmg_ruduce_rate_ = 0;
 
@@ -109,8 +96,5 @@ private:
 
     std::map<int, int> immune_tags_;
 
-    int fixed_speed_times_ = 0.0f;
-    float fixed_speed_ = 0.0f;
-
     friend class PBUtils;
 };
diff --git a/server/gameserver/buff/callfunc.cc b/server/gameserver/buff/callfunc.cc
index 9c824a89..30e57739 100644
--- a/server/gameserver/buff/callfunc.cc
+++ b/server/gameserver/buff/callfunc.cc
@@ -52,12 +52,6 @@ void CallFuncBuff::Activate()
             ProcMarkTag();
         }
         break;
-    case BuffCallFunc_e::kSpeedAddition:
-        {
-            hold_param2_ = meta->GetBuffParam2(this);
-            owner->GetAbility()->AddSpeedAddition(hold_param2_);
-        }
-        break;
     case BuffCallFunc_e::kRemoveBuff:
         {
             ProcRemoveBuff();
@@ -69,12 +63,6 @@ void CallFuncBuff::Activate()
             ProcFlashMove();
         }
         break;
-    case BuffCallFunc_e::kSetSpeed:
-        {
-            hold_param2_ = meta->GetBuffParam2(this);
-            owner->GetAbility()->SetFixedSpeed(hold_param2_);
-        }
-        break;
     case BuffCallFunc_e::kAddEnergyShield:
         {
             hold_param2_ = meta->GetBuffParam2(this);
@@ -128,16 +116,6 @@ void CallFuncBuff::Deactivate()
             }
         }
         break;
-    case BuffCallFunc_e::kSpeedAddition:
-        {
-            owner->GetAbility()->DelSpeedAddition(hold_param2_);
-        }
-        break;
-    case BuffCallFunc_e::kSetSpeed:
-        {
-            owner->GetAbility()->UnSetFixedSpeed();
-        }
-        break;
     case BuffCallFunc_e::kDmgRuduce:
         {
             owner->GetAbility()->DelDmgRuduce(hold_param2_);
diff --git a/server/gameserver/buff/callfunc.h b/server/gameserver/buff/callfunc.h
index 436e37c1..7948ad4d 100644
--- a/server/gameserver/buff/callfunc.h
+++ b/server/gameserver/buff/callfunc.h
@@ -7,10 +7,8 @@ A8_DECLARE_CLASS_ENUM(BuffCallFunc_e, int,
                       kInternalRangeAddBuff = 3,
                       kDecHp = 4,
                       kMarkTag = 5,
-                      kSpeedAddition = 6,
                       kRemoveBuff = 7,
                       kFlashMove = 8,
-                      kSetSpeed = 9,
                       kAddEnergyShield = 10,
                       kAddHp = 11,
                       kFlashMoveToPos = 12,
diff --git a/server/gameserver/mt/Buff.cc b/server/gameserver/mt/Buff.cc
index a6fceedf..508f57c2 100644
--- a/server/gameserver/mt/Buff.cc
+++ b/server/gameserver/mt/Buff.cc
@@ -277,7 +277,11 @@ namespace mt
 
     void Buff::Init2()
     {
-        if (buff_effect() == 7 && _int_buff_param1 == 1) {
+        if (buff_effect() == 7 &&
+            (_int_buff_param1 == 2 ||
+             _int_buff_param1 == 6 ||
+             _int_buff_param1 == 9
+             )) {
             abort();
         }
         switch (buff_effect()) {