[AUTO](VC/RC):[Choose one of your rear-guards with "Riviere" in its card name, and return it to your hand] When this unit's attack hits a vanguard, you may pay the cost. If you do, reveal four cards from the top of your deck, put up to one card with "Riviere" in its card name from among them into your hand, put the rest into the drop zone, and if you put a card into your hand, choose a card from your hand, and put it into your soul.