Aurora Battle Princess, Capture Cherrino

:When this unit attacks, if you have a grade 3 or greater vanguard with "Seraph" in its card name, 1, your opponent chooses a card from their drop, imprisons it in your Prison, and this unit gets +5000 until end of that battle. :At the end of the battle this unit attacked, [retire this unit], choose one of your opponent's cards imprisoned in your Prison, and put it on the bottom of the deck. If you chose a card, draw a card.