Cannot be Special Summoned. Once per turn, during the Damage Step, when this card battles an opponent's monster (Quick Effect): You can discard 1 Spirit monster; until the end of the Battle Phase, this card gains ATK/DEF equal to the ATK/DEF of the discarded monster. Once per turn, during the End Phase, if this card was Normal Summoned or flipped face-up this turn: Return it to the hand.