Unlucky Cabbage Merchant is a uncommon Creature — Human Citizen card from Avatar: The Last Airbender (TLA), collector number 201. Current market price: $0.23 (foil $0.32), TCGplayer market prices via Scryfall.
When this creature enters, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.") Whenever you sacrifice a Food, you may search your library for a basic land card and put it onto the battlefield tapped. If you search your library this way, put this creature on the bottom of its owner's library, then shuffle.