Dark Dragon, Carnivore Dragon

(This card cannot be in your main deck) (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. (When this card strides, it gains the power and card name of one heart. At the end of the turn, return it face up) :[Choose one of your rear-guards, and retire it] Your opponent chooses two of his or her rear-guards, and retires them. If he or she could not retire two cards, choose up to three units in your front row, and they get +4000 until end of turn.