Bloodtithe Harvester is a uncommon Creature — Vampire card from Innistrad: Double Feature (DBL), collector number 499. Current market price: $0.39 (foil $3.94), TCGplayer market prices via Scryfall.
When this creature enters, create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.") {T}, Sacrifice this creature: Target creature gets -X/-X until end of turn, where X is twice the number of Blood tokens you control. Activate only as a sorcery.