Fiery March Colossus

-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 one of your rear-guards, and put it on the bottom of your deck] When this unit attacks a vanguard, you may pay the cost. If you do, choose up to one of your opponent's rear-guards, your opponent puts that unit on the bottom of his or her deck, and until end of that battle, your opponent cannot call cards with the same grade as the card put on the bottom of his or her deck with this effect from hand to .