Dusk Legion Sergeant is a rare Creature — Vampire Soldier card from The Lost Caverns of Ixalan Commander (LCC), collector number 48. Current market price: $0.43, TCGplayer market prices via Scryfall.
Menace {1}{B}, Sacrifice this creature: Each nontoken Vampire creature you control gains persist until end of turn. (When it dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)