Fast Lightning of Dark Night Undercover, Wiola: DZ Booster Set 09: Super Brave Detonation

[AUTO]:When this unit is placed on (RC), if you have a vanguard with Undercover in its card name, perform one of the following. -[COST][Energy-Blast 2], search your deck for up to one Monitored Tryst, discard it, and shuffle the deck. -[COST][Counter-Blast 1], choose a card from your undercover gauge, turn it face up, put it into hand if it is a card with Undercover in its card name, and turn it face down if not.