Worm Harvest is a uncommon Sorcery card from Modern Masters (MMA), collector number 195. Current market price: $0.28 (foil $0.65), TCGplayer market prices via Scryfall.
Create a 1/1 black and green Worm creature token for each land card in your graveyard. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)