Falkenrath Pit Fighter is a rare Creature — Vampire Warrior card from Innistrad: Midnight Hunt Promos (PMID), collector number 137p. Current market price: $1.72 (foil $0.52), TCGplayer market prices via Scryfall.
{1}{R}, Discard a card, Sacrifice a Vampire: Draw two cards. Activate only if an opponent lost life this turn.