cannot get XP from the same character in PVP more than once per reboot

src/engine/objects/Experience.java

@@ -475,7 +475,8 @@ public class Experience {
 
             // Grant XP
             if(mob.getObjectType().equals(Enum.GameObjectType.PlayerCharacter))
-                killer.grantXP((int) Math.floor(grantedExperience), true);
+                if(((PlayerCharacter)mob).pvpDeaths.contains(killer.getObjectUUID()) == false)
+                    killer.grantXP((int) Math.floor(grantedExperience), true);
             else
                 killer.grantXP((int) Math.floor(grantedExperience),false);
         }

src/engine/objects/PlayerCharacter.java

@@ -181,6 +181,8 @@ public class PlayerCharacter extends AbstractCharacter {
     public boolean depositingWarehouse = false;
     public Building warehouseBuilding;
 
+    public ArrayList<PlayerCharacter> killedCharacters = new ArrayList<>();
+
     /**
      * No Id Constructor
      */