Marine General of Heavenly Silk, Aristotle

(Released when both players' vanguards are grade 3 or greater!)-Stride Step-[Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] this card on your from face down. Wave-3rd time or more (This ability is active during the specified battles of each turn): 1 When this unit attacks a vanguard, you may pay the cost. If you do, choose one of your opponent's rear-guards, and retire it.