Flame Emperor Dragon King, Root Flare Dragon

(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. :[Choose a face down card named "Flame Emperor Dragon King, Root Flare Dragon" from your G zone, and turn it face up] If the number of face up cards in your G zone is two or more, choose one of your opponent's rear-guards, and retire all of your opponent's rear-guards in the same column as that unit. This ability cannot be used for the rest of that turn.