Dark Dragon, Distress Dragon (RRR)

[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 (3) & Soul Blast (3) & Choose a face down card from your G zone, and turn it face up] Choose any number of your rear-guards, and retire them. Your opponent chooses the same number of his or her rear-guards as the number of your rear-guards retired with this effect, and retires them. If the total number retired with this effect is six or more, draw two cards, Counter Charge (1)/Soul Charge (1), and this unit gets [Power]+20000 until end of turn.