Supremacy Black Dragon, Aurageyser Doomed

(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. :[ 1 & Choose a face down card named "Supremacy Black Dragon, Aurageyser Dragon" from your G zone, turn it face up, choose three of your rear-guards, and retire them] Reveal two cards from the top of your deck. For each grade 1 or less card revealed with this effect, choose one of your opponent's rear-guards, and retire it. Put the cards revealed with this effect into your hand. If the number of face up cards named "Supremacy Black Dragon, Aurageyser Dragon" in your G zone is three or more, this unit gets +1 until end of turn.