Battle Sister, Baumkuchen

:[Choose a grade 3 card with "Battle Sister" in its card name from your hand, and reveal it] When this unit is placed on from hand, you may pay the cost. If you do, search your deck for up to one grade 3 card with "Battle Sister" in its card name, reveal it, put it into your hand, choose a card from your hand, discard it, and shuffle your deck. (Hand):While you are paying the cost for , this card gets grade +2.