Kashtira Preparations

During either player's turn: You can Special Summon 1 of your "Kashtira" monsters that is banished or in your hand. If your opponent activates a Trap Card or effect while this card is already face-up in your Spell & Trap Zone, and you control a "Kashtira" monster (except during the Damage Step): You can look at your opponent's hand and banish 1 card from it face-down. You can only use each effect of "Kashtira Preparations" once per turn.