[ACT](Hand):[Counter Blast (1) & Call this card to (RC) & Choose a card from your hand, and return it to your deck] If you have a grade 2 or greater vanguard, search your deck for one card named "Top Idol, Riviere", ride it as [Stand], and if that card rides on a grade 3 unit, choose a face down card from your G zone with "Riviere" in its card name, and Stride it on your (VC). Shuffle your deck. [AUTO](RC):[Soul Blast (1)] When your grade 4 or greater vanguard with "Riviere" in its card name attacks, you may pay the cost. If you do, [Stand] this unit.