Dark Knight, Crow Cruach

-Stride Step-[Choose one or more cards from hand with the sum of their grades being 3 or greater, and discard them], and this card on your from face down. :[Retire two rear-guards], your opponent chooses three of their rear-guards, and retires them. If they did not retire three cards, until end of turn, this unit gets ":At the end of the battle this unit attacked, [ 1 & retire two rear-guards], and this unit.", and +10000.