Aurora Battle Princess, Kyanite Cobalt

:When this unit is placed on , [reveal a grade 3 card with "Seraph" in its card name from ride deck], search your deck or hand for up to one "Galaxy Eternal Prison, Galactolus", put it into the order zone, and if you searched the deck, shuffle the deck. If you put from hand, draw a card. : 1, choose one of your opponent's rear-guards, imprison it in your Prison, and this unit gets +2000 until end of turn.