Prismatic Bless (RRR)

You may only cast this card during your opponent's turn. [Counter] Look at the number of cards from the top of your deck equal to the number of times your opponent's cards have attacked during this turn, put a card from among them into your gauge, put up to two cards into your hand, and put the rest on the bottom of your deck in any order, and you gain 1 life. You may only cast "Prismic Bless" once per turn.