Deepmuck Desperado is a uncommon Creature — Homarid Mercenary card from Outlaws of Thunder Junction (OTJ), collector number 42. Current market price: $0.27 (foil $0.35), TCGplayer market prices via Scryfall.
Whenever you commit a crime, each opponent mills three cards. This ability triggers only once each turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)