Cenn's Enlistment is a common Sorcery card from Modern Masters (MMA), collector number 9. Current market price: $0.25 (foil $0.21), TCGplayer market prices via Scryfall.
Create two 1/1 white Kithkin Soldier creature tokens. Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)