[ACT](Hand):[Put this card into your soul & Choose a card from your hand, and discard it] If you have a grade 0 vanguard, search your deck for up to one card named "Mermaid Idol, Riviere", ride it on your (VC) as [Stand], and shuffle your deck.
[CONT](RC):If you have a vanguard with "Riviere" in its card name, it gets "[CONT](VC):All of your rear-guards cannot be chosen by the effects of your opponent's cards.".