Holy Dragon, Myriad Soul Saver

(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) : 3 When this unit attacks a vanguard, if you have a heart card with "Alfred" or "Blaster" in its card name, you may pay the cost. If you do, choose up to five of your rear-guards, and they get +5000 until end of turn.