Death Star-vader, Chaos Universe (G-CB06/Re:01EN) [Rondeau of Chaos and Salvation]

[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 a face down card named "Death Star-vader, Chaos Universe" from your G zone, and turn it face up] If you have a heart card with "Chaos" in its card name, choose up to one of your opponent's open (RC), your opponent chooses a card from his or her hand, and puts it on that (RC) face down as a locked card. If your G zone has two or more face up cards, choose one of your opponent's rear-guards, and lock it.