diff --git a/source/core/src/main/com/csse3200/game/components/tasks/MobMeleeAttackTask.java b/source/core/src/main/com/csse3200/game/components/tasks/MobMeleeAttackTask.java
index 461428870..3ac8c6c3c 100644
--- a/source/core/src/main/com/csse3200/game/components/tasks/MobMeleeAttackTask.java
+++ b/source/core/src/main/com/csse3200/game/components/tasks/MobMeleeAttackTask.java
@@ -208,7 +208,7 @@ private int getInactivePriority() {
    * @return true if a target is visible, false otherwise
    */
   private boolean isTargetVisible() {
-    Vector2 newVector = new Vector2(owner.getEntity().getPosition().x - 10f, owner.getEntity().getPosition().y - 2f);
+    Vector2 newVector = new Vector2(owner.getEntity().getPosition().x - 100f, owner.getEntity().getPosition().y - 2f);
     return physics.raycast(owner.getEntity().getPosition(), newVector, TARGET, hit);
   }
 
@@ -236,7 +236,7 @@ private Weapon meleeOrProjectile() {
   }
 
   private void setTarget() {
-    Vector2 newVector = new Vector2(owner.getEntity().getPosition().x - 10f, owner.getEntity().getPosition().y - 2f);
+    Vector2 newVector = new Vector2(owner.getEntity().getPosition().x - 100f, owner.getEntity().getPosition().y - 2f);
     target = physics.raycastGetHit(owner.getEntity().getPosition(), newVector, TARGET);
   }
 }
diff --git a/source/core/src/main/com/csse3200/game/components/tasks/MobRangedAttackTask.java b/source/core/src/main/com/csse3200/game/components/tasks/MobRangedAttackTask.java
index e3885ae8b..b10dad91f 100644
--- a/source/core/src/main/com/csse3200/game/components/tasks/MobRangedAttackTask.java
+++ b/source/core/src/main/com/csse3200/game/components/tasks/MobRangedAttackTask.java
@@ -214,7 +214,7 @@ private int getInactivePriority() {
    * @return true if a target is visible, false otherwise
    */
   private boolean isTargetVisible() {
-    Vector2 newVector = new Vector2(owner.getEntity().getPosition().x - 10f, owner.getEntity().getPosition().y - 2f);
+    Vector2 newVector = new Vector2(owner.getEntity().getPosition().x - 100f, owner.getEntity().getPosition().y - 2f);
     return physics.raycast(owner.getEntity().getPosition(), newVector, TARGET, hit);
   }
 
@@ -242,7 +242,7 @@ private Weapon meleeOrProjectile() {
   }
 
   private void setTarget() {
-    Vector2 newVector = new Vector2(owner.getEntity().getPosition().x - 10f, owner.getEntity().getPosition().y - 2f);
+    Vector2 newVector = new Vector2(owner.getEntity().getPosition().x - 100f, owner.getEntity().getPosition().y - 2f);
     target = physics.raycastGetHit(owner.getEntity().getPosition(), newVector, TARGET);
   }
 }
diff --git a/source/core/src/main/com/csse3200/game/components/tasks/bosstask/DemonBossTask.java b/source/core/src/main/com/csse3200/game/components/tasks/bosstask/DemonBossTask.java
index e9fc0e514..6349e51ab 100644
--- a/source/core/src/main/com/csse3200/game/components/tasks/bosstask/DemonBossTask.java
+++ b/source/core/src/main/com/csse3200/game/components/tasks/bosstask/DemonBossTask.java
@@ -123,6 +123,10 @@ public void run() {
      */
     @Override
     public void update() {
+      // * Don't know if this is actually needed.
+      if(ServiceLocator.getGameEndService().hasGameEnded()) {
+        stop();
+      }
         // give game time to load in then start
         if (!startFlag) {
             return;
@@ -381,6 +385,11 @@ private void fireBreath() {
             Timer.schedule(new Timer.Task() {
                 @Override
                 public void run() {
+                  // service locator getting a service could be anything here.
+                  if(ServiceLocator.getTimeSource() == null) {
+                    stop();
+                    return; // prevent current iteration from running.
+                  }
                     Entity projectile = ProjectileFactory.createEffectProjectile(PhysicsLayer.HUMANS, destination,
                             new Vector2(2, 2), effect, aoe);
                     projectile.setPosition(demon.getPosition().x, demon.getPosition().y);
diff --git a/source/core/src/main/com/csse3200/game/components/tasks/bosstask/IceBabyTask.java b/source/core/src/main/com/csse3200/game/components/tasks/bosstask/IceBabyTask.java
index 31f61136c..f89f12ed0 100644
--- a/source/core/src/main/com/csse3200/game/components/tasks/bosstask/IceBabyTask.java
+++ b/source/core/src/main/com/csse3200/game/components/tasks/bosstask/IceBabyTask.java
@@ -124,7 +124,10 @@ public void update() {
         }
         if (health <= 0) {
             changeState(STATE.DEATH);
-            iceBaby.setFlagForDelete(true);
+            animate();
+            if (animation.isFinished()) {
+                iceBaby.setFlagForDelete(true);
+            }
         }
 
         switch (iceBabyState) {
diff --git a/source/core/src/main/com/csse3200/game/components/tasks/bosstask/PatrickTask.java b/source/core/src/main/com/csse3200/game/components/tasks/bosstask/PatrickTask.java
index 9e41941dd..ee06a9d44 100644
--- a/source/core/src/main/com/csse3200/game/components/tasks/bosstask/PatrickTask.java
+++ b/source/core/src/main/com/csse3200/game/components/tasks/bosstask/PatrickTask.java
@@ -251,6 +251,10 @@ private void meleeAttack() {
         initialPos = patrick.getPosition();
         meleeTarget = ServiceLocator.getEntityService().getClosestEntityOfLayer(
                 patrick, PhysicsLayer.HUMANS);
+        // check if melee target exists
+        if (meleeTarget == null) {
+            return;
+        }
         teleport(meleeTarget.getPosition());
         meleeFlag = true;
     }
diff --git a/source/core/src/main/com/csse3200/game/entities/factories/WaveFactory.java b/source/core/src/main/com/csse3200/game/entities/factories/WaveFactory.java
index 23c76f4eb..c3376095d 100644
--- a/source/core/src/main/com/csse3200/game/entities/factories/WaveFactory.java
+++ b/source/core/src/main/com/csse3200/game/entities/factories/WaveFactory.java
@@ -97,9 +97,9 @@ public static LevelWaves createLevel(int maxDiff, int maxWaves, int chosenLevel)
     String boss1 = "IceBoss";
 //    String boss1 = "PatrickBoss";
     String boss2 = "PatrickBoss";
-    String boss3 = "IceBoss";
+    // String boss3 = "IceBoss";
     //TODO change this to a fire boss in sprint 4
-//    String boss3 = "FireBoss";
+   String boss3 = "FireBoss";
     LevelWaves level = new LevelWaves(5);
 
     ArrayList<String> possibleMobs;
diff --git a/source/core/src/test/com/csse3200/game/entities/factories/WaveFactoryTest.java b/source/core/src/test/com/csse3200/game/entities/factories/WaveFactoryTest.java
index a5f666ff4..8e43b601e 100644
--- a/source/core/src/test/com/csse3200/game/entities/factories/WaveFactoryTest.java
+++ b/source/core/src/test/com/csse3200/game/entities/factories/WaveFactoryTest.java
@@ -59,7 +59,7 @@ class WaveFactoryTest {
   private final int LVL3_WAVES = 15;
   private final int LVL3_CHOSEN_LVL = 2;
   private final ArrayList<String> LVL3_MOBS = new ArrayList<>(Arrays.asList("Xeno", "DodgingDragon", "FireWorm"));
-  private final String LVL3_BOSS = "IceBoss";
+  private final String LVL3_BOSS = "FireBoss";
 //  private final String LVL3_BOSS = "FireBoss";
   //TODO: make this a fire boss in sprint 4