Super Ancient Dragon, Burn Geryon (G-BT10/029EN) [Raging Clash of the Blade Fangs]

[Stride]-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)[1/Turn]: [Counter Blast (1)] Choose one of your rear-guards with "Ancient Dragon" in its card name, and until end of turn, it gets"[AUTO]:When this unit is retired from (RC), return this card to your hand.". [AUTO](VC): [Choose one of your rear-guards with "Ancient Dragon" in its card name, and retire it] When this unit attacks, you may pay the cost. If you do, this unit gets [Power]+10000 until end of turn.