diff --git a/server/gameserver/buff.cc b/server/gameserver/buff.cc
index 540d94d..fe2acbd 100644
--- a/server/gameserver/buff.cc
+++ b/server/gameserver/buff.cc
@@ -4,6 +4,7 @@
 #include "metamgr.h"
 #include "human.h"
 #include "room.h"
+#include "collider.h"
 
 int Buff::GetLeftTime()
 {
@@ -22,3 +23,62 @@ void Buff::FillMFBuff(cs::MFBuff* buff_pb)
     buff_pb->set_left_time(GetLeftTime());
     buff_pb->set_lasting_time(GetLastingTime());
 }
+
+void Buff::ProcLastBurn(const a8::XParams& param)
+{
+    Human* hum = (Human*)param.sender.GetUserData();
+    Buff* buff = (Buff*)param.param1.GetUserData();
+    if (!hum->dead && !hum->HasBuffEffect(BET_Invincible)) {
+        hum->DecHP(buff->meta->param1,
+                   hum->last_attacker_id,
+                   hum->last_attacker_name,
+                   hum->last_attacker_weapon_id);
+    }
+ }
+
+void Buff::ProcReleaseDcgr(const a8::XParams& param)
+{
+    Human* sender = (Human*)param.sender.GetUserData();
+    Buff* buff = (Buff*)param.param1.GetUserData();
+    MetaData::Buff* add_buff = MetaMgr::Instance()->GetBuff(buff->meta->param2);
+    if (!sender->dead && add_buff) {
+        CircleCollider collider;
+        collider.owner = sender;
+        collider.rad = buff->meta->param2;
+        for (auto& cell : sender->grid_list) {
+            for (Human* hum : cell->human_list) {
+                if (hum != sender && !hum->HasBuffEffect(BET_Invincible)) {
+                    if (hum->TestCollision(&collider)) {
+                        hum->AddBuff(add_buff);
+                    }
+                }
+            }
+        }
+    }
+}
+
+void Buff::ProcReleaseFireBomb(const a8::XParams& param)
+{
+    Human* sender = (Human*)param.sender.GetUserData();
+    Buff* buff = (Buff*)param.param1.GetUserData();
+    if (!sender->dead) {
+        SectorCollider collider;
+        collider.owner = sender;
+        collider.angle = buff->meta->param2;
+        collider.rad = buff->meta->param3;
+        for (auto& cell : sender->grid_list) {
+            for (Human* hum : cell->human_list) {
+                if (hum != sender && !hum->dead && !hum->HasBuffEffect(BET_Invincible)) {
+                    if (hum->TestCollision(&collider)) {
+                        hum->DecHP(
+                                   buff->meta->param4,
+                                   sender->entity_uniid,
+                                   sender->name,
+                                   0
+                                   );
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/server/gameserver/buff.h b/server/gameserver/buff.h
index a7f2d7a..5516905 100644
--- a/server/gameserver/buff.h
+++ b/server/gameserver/buff.h
@@ -28,4 +28,8 @@ class Buff
     int GetLeftTime();
     int GetLastingTime();
     void FillMFBuff(cs::MFBuff* buff_pb);
+
+    static void ProcLastBurn(const a8::XParams& param);
+    static void ProcReleaseDcgr(const a8::XParams& param);
+    static void ProcReleaseFireBomb(const a8::XParams& param);
 };
diff --git a/server/gameserver/collider.cc b/server/gameserver/collider.cc
index 0542074..f322d71 100644
--- a/server/gameserver/collider.cc
+++ b/server/gameserver/collider.cc
@@ -90,6 +90,37 @@ bool ColliderComponent::Intersect(ColliderComponent* b)
                                                       b_circle->rad);
                 }
                 break;
+            case CT_Sector:
+                {
+                    SectorCollider* b_sector = (SectorCollider*)b;
+                    return a8::IntersectSectorCircle(
+                                                     b_sector->owner->pos + b_sector->pos,
+                                                     b_sector->angle,
+                                                     b_sector->rad,
+                                                     a_circle->owner->pos + a_circle->pos,
+                                                     a_circle->rad);
+                }
+                break;
+            }
+        }
+        break;
+    case CT_Sector:
+        {
+            SectorCollider* a_sector = (SectorCollider*)this;
+            switch (b->type) {
+            case CT_None:
+                break;
+            case CT_Circle:
+                {
+                    CircleCollider* b_circle = (CircleCollider*)b;
+                    return a8::IntersectSectorCircle(
+                                                     a_sector->owner->pos + a_sector->pos,
+                                                     a_sector->angle,
+                                                     a_sector->rad,
+                                                     b_circle->owner->pos + b_circle->pos,
+                                                     b_circle->rad);
+                }
+                break;
             }
         }
         break;
@@ -177,6 +208,11 @@ void DestoryCollider(ColliderComponent* collider)
             delete (CircleCollider*)collider;
         }
         break;
+    case CT_Sector:
+        {
+            delete (SectorCollider*)collider;
+        }
+        break;
     default:
         {
             delete collider;
diff --git a/server/gameserver/collider.h b/server/gameserver/collider.h
index 148a2f8..1ebc8cb 100644
--- a/server/gameserver/collider.h
+++ b/server/gameserver/collider.h
@@ -4,7 +4,8 @@ enum ColliderType_e
 {
     CT_None,
     CT_Aabb,
-    CT_Circle
+    CT_Circle,
+    CT_Sector
 };
 
 class Entity;
@@ -38,4 +39,14 @@ public:
     CircleCollider() { type = CT_Circle; };
 };
 
+class SectorCollider : public ColliderComponent
+{
+public:
+    a8::Vec2 pos;
+    float rad = 0.0f;
+    float angle = 0.0f;
+
+    SectorCollider() { type = CT_Sector; };
+};
+
 void DestoryCollider(ColliderComponent* collider);
diff --git a/server/gameserver/constant.h b/server/gameserver/constant.h
index 2b5aa25..dc10cbe 100755
--- a/server/gameserver/constant.h
+++ b/server/gameserver/constant.h
@@ -195,7 +195,7 @@ enum BuffEffectType_e
     BET_Hide = 6, //隐身
     BET_Dcgr = 7, //电磁干扰
     BET_ReleaseDcgr = 8, //释放电磁干扰
-    BET_ReleaseFireBomb = 9, //释放燃烧弹
+    BET_ReleaseFireBomb = 9, //喷火
     BET_End
 };
 
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index 0b2f2d9..6801b61 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -81,7 +81,7 @@ float Human::GetSpeed()
         }
     }
     speed = (speed + buff_attr_abs_[HAT_Speed]) * (1 + buff_attr_rate_[HAT_Speed]);
-    return std::min(speed, 1.0f);
+    return std::max(speed, 1.0f);
 }
 
 float Human::GetSpeed4()
@@ -1430,17 +1430,31 @@ void Human::ProcBuffEffect(Buff* buff)
                                                  a8::XParams()
                                                  .SetSender(this)
                                                  .SetParam1(buff),
-                                                 [] (const a8::XParams& param)
-                                                 {
-                                                     Human* hum = (Human*)param.sender.GetUserData();
-                                                     Buff* buff = (Buff*)param.param1.GetUserData();
-                                                     if (!hum->dead) {
-                                                         hum->DecHP(buff->meta->param1,
-                                                                    hum->last_attacker_id,
-                                                                    hum->last_attacker_name,
-                                                                    hum->last_attacker_weapon_id);
-                                                     }
-                                                 },
+                                                 Buff::ProcLastBurn,
+                                                 &buff->xtimer_attacher.timer_list_
+                                                 );
+        }
+        break;
+    case BET_ReleaseDcgr:
+        {
+            room->xtimer.AddRepeatTimerAndAttach(
+                                                 buff->meta->param1* 1000 / FRAME_RATE_MS,
+                                                 a8::XParams()
+                                                 .SetSender(this)
+                                                 .SetParam1(buff),
+                                                 Buff::ProcReleaseDcgr,
+                                                 &buff->xtimer_attacher.timer_list_
+                                                 );
+        }
+        break;
+    case BET_ReleaseFireBomb:
+        {
+            room->xtimer.AddRepeatTimerAndAttach(
+                                                 buff->meta->param1* 1000 / FRAME_RATE_MS,
+                                                 a8::XParams()
+                                                 .SetSender(this)
+                                                 .SetParam1(buff),
+                                                 Buff::ProcReleaseFireBomb,
                                                  &buff->xtimer_attacher.timer_list_
                                                  );
         }
diff --git a/server/gameserver/metadata.cc b/server/gameserver/metadata.cc
index 9f0b346..218fb7d 100644
--- a/server/gameserver/metadata.cc
+++ b/server/gameserver/metadata.cc
@@ -417,6 +417,7 @@ namespace MetaData
         param1 = a8::XValue(i->buff_param1()).GetDouble();
         param2 = a8::XValue(i->buff_param2()).GetDouble();
         param3 = a8::XValue(i->buff_param3()).GetDouble();
+        param4 = a8::XValue(i->buff_param4()).GetDouble();
     }
 
     bool Buff::EffectCanStack()
diff --git a/server/gameserver/metadata.h b/server/gameserver/metadata.h
index 02b8dad..d6954d2 100755
--- a/server/gameserver/metadata.h
+++ b/server/gameserver/metadata.h
@@ -136,6 +136,7 @@ namespace MetaData
         float param1 = 0.0f;
         float param2 = 0.0f;
         float param3 = 0.0f;
+        float param4 = 0.0f;
     };
 
     struct SkillPhase
diff --git a/server/tools/protobuild/metatable.proto b/server/tools/protobuild/metatable.proto
index 3818540..03f5677 100755
--- a/server/tools/protobuild/metatable.proto
+++ b/server/tools/protobuild/metatable.proto
@@ -150,11 +150,11 @@ message Buff
     required int32 buff_target = 2;
     required int32 buff_effect = 3;
     required int32 trigger_type = 4;
-    required int32 trigger_chance = 5;
     required string buff_param1 = 6;
     required string buff_param2 = 7;
     required string buff_param3 = 8;
-    required int32 duration_time = 9;
+    required string buff_param4 = 9;
+    required int32 duration_time = 10;
 }
 
 message Drop
diff --git a/third_party/a8engine b/third_party/a8engine
index 88b75d8..287a824 160000
--- a/third_party/a8engine
+++ b/third_party/a8engine
@@ -1 +1 @@
-Subproject commit 88b75d811aecd688865fddf4d47413a50f953d34
+Subproject commit 287a824201d2aac638b5a8b2b0c01e87973dc685