[ACT](Hand):[Put this card into your soul & Choose a card from your hand, and discard it] If you have a vanguard named "Mermaid Idol, Riviere", search your deck for up to one card named "Super Idol, Riviere", ride it on your (VC) as [Stand], and shuffle your deck. [AUTO](RC):When your vanguard with "Riviere" in its card name attacks, you may return this card to your hand. If you do, call this card to (RC).