Helldeity Seal Dragon, Crossorigin

-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 from your G zone, and turn it face up] If you have a heart card with "Seal Dragon" in its card name, for each face up card named "Helldeity Seal Dragon, Crossorigin" in your G zone, choose up to one of your opponent's rear-guards, and retire it. Your opponent reveals four cards from the top of his or her deck, and chooses a grade 2 card from among them for each unit put into the drop zone with this effect. Your opponent calls the chosen cards to separate open , and shuffles his or her deck. If your opponent has two or more grade 2 rear-guards, this unit gets +1 until end of turn.