Interdimensional Dragon, Grogrock Dragon (V-SS05/S19EN) [Premium Collection 2020]

"[Stride]-Stride Step-[COST][Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] [Stride] this card on your (VC) from face down. [AUTO]{(VC)}:At the end of the battle it attacked, [COST][Counter-Blast 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 [Stand], it gets drive -1 until end of turn, and shuffle your deck."