Divine Knight of Flashing Flame, Samuel (G-BT02/S01EN) [Soaring Ascent of Gale & Blossom]

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. [AUTO](VC):[Counter Blast (2)] When this unit attacks a vanguard, if the number of cards in your opponent's damage zone is four or less, and the number of rear-guards you have is five or more, you may pay the cost. If you do, choose one of your opponent's vanguards, and deal one damage. (Perform a damage check.)