Melffy Wally (POTE-EN022) - Power of the Elements Unlimited

If your opponent Normal or Special Summons a monster(s) (except during the Damage Step), or if an opponent's monster targets this card for an attack: You can return this card to the hand, then you can Special Summon 2 "Melffy" monsters from your Deck with different names from each other, except "Melffy Wally". During your End Phase: You can Special Summon this card from your hand. You can only use each effect of "Melffy Wally" once per turn.