Destructive Equipment, Hammer Gewalt

-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. /:Engorge (When this unit attacks, you may retire one or more of your other rear-guards. If you do, it is engorged until end of turn) :When this unit becomes engorged, this unit gets +3000 until end of turn, and if the number of units retired during this turn due to the effect of this unit's engorge ability is two or more, choose a rear-guard in your opponent's front row, and retire it.