SpreadingChorus, Eerlis: DZ Booster Set 10: Dragonsoul Resonance

[AUTO]:When this unit is placed on (RC), look at the top seven cards of your deck, choose up to one Sound System card from among them, discard it, and shuffle the deck. [AUTO]:When this unit is retired from (RC), if you have a grade 3 or greater vanguard with Artisaria in its card name, call up to one Shadow Army token to a back row (RC).