Metapulsar, Mystery-freeze Dragon

-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. : 2 Shuffle your deck, and bind four cards from the top of your deck face up. Until end of turn, for the battle that this unit attacked, your opponent cannot call cards from his or her hand with the same grade as the cards bound by this effect to . If a grade 3 card was bound by this effect, this unit gets drive +1.