//Put this script OnExit
void main()
{

object oPC = GetExitingObject();

if (!GetIsPC(oPC)) return;

object oItem;
oItem = GetFirstItemInInventory(oPC);

while (GetIsObjectValid(oItem))
   {
   if (GetTag(oItem)=="arenatoken") DestroyObject(oItem);

   oItem = GetNextItemInInventory(oPC);
   }

}