If you have "Creepy Kid, Aqua" and "Practicing Together, Ruby & Ai", choose up to 1 "Unshakable Center, Ai" in your hand, put it in any position of your stage, and that character gets the following ability until end of turn. "【CONT】 During this card's battle, your opponent cannot play event cards or "Backup" from their hand."
Put this card into your memory.