Thunderbolt Shockwave Colossus

(This card cannot be in your main deck) (Released when both players' vanguards are grade 3 or greater!)-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. (When this card strides, it gains the power and card name of one heart. At the end of the turn, return it face up) : 1 When this unit is put into the G zone from , you may pay the cost. If you do, choose up to one other face up card from your G zone, and turn it face down.