Battle Sister, Cocotte

/: 1-card with "Battle Sister" in its card name] When this unit's attack hits a vanguard, if you have an Oracle Think Tank vanguard, you may pay the cost. If you do, look at the top card of your deck, search for up to one card with "Battle Sister" in its card name from among them, reveal it to your opponent, put it into your hand, and put the rest on the bottom of your deck.