Destruction Tyrant, Hellrex Maxima

-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. :[Choose one of your rear-guards, and retire it] If you have a heart card with "Rex" in its card name, search your deck for up to one card with "Rex" in its card name, bind it face up, and shuffle your deck. If you bound a card, choose up to three units in your front row, and they get +4000 until end of turn.