Boneyard Desecrator is a common Creature — Zombie Mercenary card from Outlaws of Thunder Junction (OTJ), collector number 81. Current market price: $0.19 (foil $0.25), TCGplayer market prices via Scryfall.
Menace {1}{B}, Sacrifice another creature: Put a +1/+1 counter on this creature. If an outlaw was sacrificed this way, create a Treasure token. (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.)