Interdimensional Dragon, Grogrock 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. :At the end of the battle it attacked, [ 1 & bind four rear-guards], put this unit into your G zone face up, search your deck for up to one grade 3 or greater card, ride it as , it gets drive -1 until end of turn, and shuffle your deck.