diff --git a/Crawler/Crawler.cpp b/Crawler/Crawler.cpp
index 937e6394..1705ca68 100644
--- a/Crawler/Crawler.cpp
+++ b/Crawler/Crawler.cpp
@@ -121,6 +121,10 @@ bool Crawler::OnUserUpdate(float fElapsedTime){
 	for(Monster&m:MONSTER_LIST){
 		m.Update(fElapsedTime);
 	}
+	for(Monster&m:monstersToBeSpawned){
+		MONSTER_LIST.push_back(m);
+	}
+	monstersToBeSpawned.clear();
 	UpdateBullets(fElapsedTime);
 	UpdateCamera(fElapsedTime);
 	RenderWorld(fElapsedTime);
@@ -1374,4 +1378,8 @@ void Crawler::InitializeLevels(){
 	INITLEVEL(CAMPAIGN_1_2);
 
 	LEVEL_NAMES.SetInitialized();
+}
+
+void Crawler::SpawnMonster(vf2d pos,MonsterData*data,bool upperLevel){
+	monstersToBeSpawned.push_back(Monster(pos,*data,upperLevel));
 }
\ No newline at end of file
diff --git a/Crawler/Crawler.h b/Crawler/Crawler.h
index 37bfa3ff..1241c876 100644
--- a/Crawler/Crawler.h
+++ b/Crawler/Crawler.h
@@ -47,6 +47,7 @@ private:
 	float reflectionUpdateTimer=0;
 	float reflectionStepTime=0;
 	std::set<vi2d>visibleTiles;
+	std::vector<Monster>monstersToBeSpawned;
 public:
 	Crawler();
 	bool OnUserCreate() override;
@@ -108,6 +109,7 @@ public:
 	void RenderTile(vi2d pos,TilesheetData tileSheet,int tileSheetIndex,vi2d tileSheetPos);
 	void RenderTile(TileRenderData&tileSheet,Pixel col);
 	bool IsReflectiveTile(TilesheetData tileSheet,int tileID);
+	void SpawnMonster(vf2d pos,MonsterData*data,bool upperLevel=false); //Queues a monster for spawning on the next frame.
 
 	struct TileGroupData{
 		vi2d tilePos;
diff --git a/Crawler/DEFINES.h b/Crawler/DEFINES.h
index e921d17c..37c07a6d 100644
--- a/Crawler/DEFINES.h
+++ b/Crawler/DEFINES.h
@@ -5,6 +5,7 @@
 #define INCLUDE_DAMAGENUMBER_LIST extern std::vector<std::shared_ptr<DamageNumber>>DAMAGENUMBER_LIST;
 #define INCLUDE_game extern Crawler*game;
 #define INCLUDE_MONSTER_DATA extern std::map<int,MonsterData>MONSTER_DATA;
+#define INCLUDE_MONSTER_NAME_DATA extern safemap<std::string,MonsterData*>MONSTER_NAME_DATA;
 #define INCLUDE_BULLET_LIST extern std::vector<std::unique_ptr<Bullet>>BULLET_LIST;
 #define INCLUDE_EMITTER_LIST extern std::vector<std::unique_ptr<Emitter>>EMITTER_LIST;
 #define INCLUDE_DATA extern utils::datafile DATA;
diff --git a/Crawler/Monster.cpp b/Crawler/Monster.cpp
index 43820736..4cab3f36 100644
--- a/Crawler/Monster.cpp
+++ b/Crawler/Monster.cpp
@@ -286,7 +286,7 @@ void MonsterSpawner::SetTriggered(bool trigger,bool spawnMonsters){
 	triggered=trigger;
 	if(spawnMonsters){
 		for(std::pair<int,vf2d>&monsterInfo:monsters){
-			MONSTER_LIST.push_back(Monster(pos+monsterInfo.second,MONSTER_DATA[monsterInfo.first],DoesUpperLevelSpawning()));
+			game->SpawnMonster(pos+monsterInfo.second,&MONSTER_DATA[monsterInfo.first],DoesUpperLevelSpawning());
 		}
 	}
 }
diff --git a/Crawler/MonsterData.cpp b/Crawler/MonsterData.cpp
index 79b00c94..abd1eee8 100644
--- a/Crawler/MonsterData.cpp
+++ b/Crawler/MonsterData.cpp
@@ -10,6 +10,7 @@ INCLUDE_STRATEGY_DATA
 INCLUDE_ANIMATION_DATA
 
 std::map<int,MonsterData>MONSTER_DATA;
+safemap<std::string,MonsterData*>MONSTER_NAME_DATA;
 
 MonsterData::MonsterData()
 :atk(0),collisionDmg(0),hp(0),id(0),moveSpd(0),size(0),strategy(0){}
@@ -98,6 +99,7 @@ void MonsterData::InitializeMonsterData(){
 		);
 
 		MONSTER_DATA[id]=monster;
+		MONSTER_NAME_DATA[MonsterName]=&MONSTER_DATA[id];
 
 		id++;
 	}
diff --git a/Crawler/SlimeKing.cpp b/Crawler/SlimeKing.cpp
index d944cf9e..d890d6d2 100644
--- a/Crawler/SlimeKing.cpp
+++ b/Crawler/SlimeKing.cpp
@@ -10,6 +10,7 @@
 INCLUDE_game
 INCLUDE_BULLET_LIST
 INCLUDE_ANIMATION_DATA
+INCLUDE_MONSTER_NAME_DATA
 
 typedef Attribute A;
 
@@ -22,7 +23,7 @@ void Monster::STRATEGY::SLIMEKING(Monster&m,float fElapsedTime,int strategyNumbe
 	m.F(A::SHOOT_RING_DELAY)=std::max(0.f,m.F(A::SHOOT_RING_DELAY)-fElapsedTime);
 	m.F(A::JUMP_LANDING_TIMER)=std::max(0.f,m.F(A::JUMP_LANDING_TIMER)-fElapsedTime);
 
-	auto ShootBulletRing=[&](float angleOffset){
+	const auto ShootBulletRing=[&](float angleOffset){
 		int bulletCount=ConfigInt("Phase1.RingBulletCount");
 		for(int i=0;i<bulletCount;i++){
 			float angle=((2*PI)/bulletCount)*i+angleOffset;
@@ -30,13 +31,48 @@ void Monster::STRATEGY::SLIMEKING(Monster&m,float fElapsedTime,int strategyNumbe
 		}
 	};
 
-	auto Landed=[&ShootBulletRing,&m](int currentPhase){
+	const auto Landed=[&ShootBulletRing,&m](int currentPhase){
 		if(currentPhase==1){
 			ShootBulletRing(m.F(A::SHOOT_RING_OFFSET));
 		}
 	};
 
-	auto StartJump=[&](float jumpDuration,vf2d targetPos,float recoveryTime){
+	const auto TransitionPhase=[&](int newPhase){
+		switch(newPhase){
+			case 2:{
+				std::string spawnMonster=ConfigStringArr("Phase2.MonsterSpawnOnChange",0);
+				int spawnCount=ConfigIntArr("Phase2.MonsterSpawnOnChange",1);
+
+				for(int i=0;i<spawnCount;i++){
+					float randomAngle=util::random(2*PI);
+					game->SpawnMonster(m.pos+vf2d{cos(randomAngle),sin(randomAngle)}*m.GetSizeMult()*12,MONSTER_NAME_DATA[spawnMonster]); 
+				}
+			}break;
+			case 3:{
+				std::string spawnMonster=ConfigStringArr("Phase3.MonsterSpawnOnChange",0);
+				int spawnCount=ConfigIntArr("Phase3.MonsterSpawnOnChange",1);
+
+				for(int i=0;i<spawnCount;i++){
+					float randomAngle=util::random(2*PI);
+					game->SpawnMonster(m.pos+vf2d{cos(randomAngle),sin(randomAngle)}*m.GetSizeMult()*12,MONSTER_NAME_DATA[spawnMonster]); 
+				}
+			}break;
+			case 4:{
+				std::string spawnMonster=ConfigStringArr("Phase4.MonsterSpawnOnChange",0);
+				int spawnCount=ConfigIntArr("Phase4.MonsterSpawnOnChange",1);
+
+				for(int i=0;i<spawnCount;i++){
+					float randomAngle=util::random(2*PI);
+					game->SpawnMonster(m.pos+vf2d{cos(randomAngle),sin(randomAngle)}*m.GetSizeMult()*12,MONSTER_NAME_DATA[spawnMonster]); 
+				}
+			}break;
+			case 5:{
+
+			}break;
+		}
+	};
+
+	const auto StartJump=[&](float jumpDuration,vf2d targetPos,float recoveryTime){
 		m.V(A::JUMP_ORIGINAL_POS)=m.GetPos();
 		m.F(A::JUMP_ORIGINAL_LANDING_TIMER)=m.F(A::JUMP_LANDING_TIMER)=jumpDuration;
 		m.V(A::JUMP_TARGET_POS)=targetPos;
@@ -112,6 +148,8 @@ void Monster::STRATEGY::SLIMEKING(Monster&m,float fElapsedTime,int strategyNumbe
 			if(m.hp<=m.maxhp*ConfigFloat("Phase2.Change")/100){
 				m.phase=2;
 				m.SetSize(ConfigFloat("Phase2.Size")/100,false);
+				TransitionPhase(m.phase);
+				return;
 			}
 			if(m.F(A::SHOOT_RING_TIMER)==0){
 				if(m.I(A::PATTERN_REPEAT_COUNT)>=ConfigInt("Phase1.JumpAfter")){
@@ -143,18 +181,24 @@ void Monster::STRATEGY::SLIMEKING(Monster&m,float fElapsedTime,int strategyNumbe
 			if(m.hp<=m.maxhp*ConfigFloat("Phase3.Change")/100){
 				m.phase=3;
 				m.SetSize(ConfigFloat("Phase3.Size")/100,false);
+				TransitionPhase(m.phase);
+				return;
 			}
 		}break;
 		case 3:{
 			if(m.hp<=m.maxhp*ConfigFloat("Phase4.Change")/100){
 				m.phase=4;
 				m.SetSize(ConfigFloat("Phase4.Size")/100,false);
+				TransitionPhase(m.phase);
+				return;
 			}
 		}break;
 		case 4:{
 			if(m.hp<=0){
 				m.phase=5;
 				m.F(A::IFRAME_TIME_UPON_HIT)=1;
+				TransitionPhase(m.phase);
+				return;
 			}
 		}break;
 	}
diff --git a/Crawler/Version.h b/Crawler/Version.h
index 7350c2e0..6c74f57d 100644
--- a/Crawler/Version.h
+++ b/Crawler/Version.h
@@ -2,7 +2,7 @@
 #define VERSION_MAJOR 0
 #define VERSION_MINOR 2
 #define VERSION_PATCH 0
-#define VERSION_BUILD 1334
+#define VERSION_BUILD 1342
 
 #define stringify(a) stringify_(a)
 #define stringify_(a) #a