Genesis Dragon, Excelics Messiah D-SS04/017R TDR

(This card cannot be in your main deck) [Stride]-Stride Step-COST [Discard a grade 3 card with "Messiah" in its card name from your hand], and Stride this card on your (VC) from face down. (When you stride, your original vanguard becomes a heart card, and this unit gets that card's [Power] and card name. At the end of the turn, return this unit face up) [AUTO](VC) Generation Break 2:When this unit attacks, COST [Counter Blast (1)], choose any number of any player's locked cards, and unlock them. If you unlocked a card, choose the same number of your rear-guards as the number of cards unlocked by this ability, [Stand] them, and until end of turn, all of your front row units get [Power]+10000, and this unit gets [Critical]+1.