Star-vader, Penrose Gate (G-CB06/027EN) [Rondeau of Chaos and Salvation]

[CONT](Hand): If you have a vanguard with "Star-vader" in its card name, while you are paying the cost for Stride a G unit with "Star-vader" in its card name, you may discard this card as a grade 3 card. [AUTO]: [Soul Blast (1)] When this card is discarded from hand for the cost of Stride, if you have a vanguard with "Chaos" in its original card name, you may pay the cost. If you do, look at seven cards from the top of your deck, reveal up to one card with "Chaos" in its card name from among them, put it into your hand, and shuffle your deck.