Spiritual Beast Apelio (THSF-EN025) - The Secret Forces Unlimited

Once per turn, during either player's turn: You can banish 1 "Ritual Beast" card from your Graveyard; for the rest of this turn, all "Ritual Beast" monsters you control will gain 500 ATK and DEF. You can only Special Summon "Spiritual Beast Apelio(s)" once per turn.