Corpse Harvester is a uncommon Creature — Zombie Wizard card from Legions (LGN), collector number 62. Current market price: $0.39 (foil $16.76), TCGplayer market prices via Scryfall.
{1}{B}, {T}, Sacrifice a creature: Search your library for a Zombie card and a Swamp card, reveal them, put them into your hand, then shuffle.