Enneacraft - Aiza.LEON

You can reveal this card in your hand; Special Summon 1 monster from your hand in face-down Defense Position. You cannot Special Summon the turn you activate this effect, except in face-down Defense Position. When your opponent activates a card or effect in response to the activation of your card or effect (Quick Effect): You can change this Set card to face-up Defense Position; return up to 3 cards on the field to the hand. Each time a card(s) is added to your opponent's hand by their card effect while you control this monster flipped face-up, inflict 900 damage to them for each.