Great Hero, Rising Supernova

-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. :[Choose a face down card from your G zone, and turn it face up] When this unit attacks a vanguard, you may pay the cost. If you do, choose up to the same number of your rear-guards as the number of face up "Great Hero, Rising Supernova" in your G zone, they become charging, and if four or more of your rear-guards are charging, all of your units get +10000 until end of turn. (Units without the charge ability can be charging too)