Flame Emperor Dragon King, Root Flare Dragon (G-BT01/005EN) [Generation Stride]

Stride (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] Stride this card on your (VC) from face down. [ACT](VC):[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.