Feuerfly Dragon

[Overcharge]:When your vanguard attacks a grade 3 or greater unit, if this unit was chosen by the ability of your grade 3 or greater vanguard with "Aelquilibra" in its card name this turn, and your rear-guard did not [Stand] by a card's ability this turn, put this unit into soul, choose one of your front row rear-guards with the Overcharge ability, [Stand] it, and draw a card.