Card Ability

■ [Set] ■ [Cast Cost] [Pay 1 gauge. & Choose a card from your deck, put it face down into this card's soul, and shuffle your deck] ■ When a monster enters your opponent's field, you may look at this card's soul, and reveal it. If the revealed card has the same size as the monster that entered your opponent's field, destroy it, and deal two damage to your opponent. Then, destroy this card.