"Dark Magician" + 1 Level 7 or higher Dragon or Warrior monster
If your monster attacks a Defense Position monster, inflict piercing battle damage to your opponent. Once per turn, when your monster destroys an opponent's monster by battle: You can inflict damage to your opponent equal to the destroyed monster's original ATK. If this card is destroyed: You can Special Summon both 1 "Dark Magician" and 1 "Gaia the Dragon Champion" from your hand, Deck, Extra Deck, and/or GY.