Armageddon

This spell banishes any creature within sight to a demi-plane where, in a final battle, the creatures are forced to fight one another to the death. There is no way to leave this plane through magic or any other means. The winner of the battle is returned to the original site, while the souls of any dead creatures are sent to Hades. If there is only one target, the creature is taken to the demi-plane, but must fight a Solar if it has an Evil alignment or a Balor if it has a Good or Neutral alignment.