Shefet Dunes is a uncommon Land — Desert card from Outlaws of Thunder Junction Commander (OTC), collector number 318. Current market price: $0.30, TCGplayer market prices via Scryfall.
{T}: Add {C}. {T}, Pay 1 life: Add {W}. {2}{W}{W}, {T}, Sacrifice a Desert: Creatures you control get +1/+1 until end of turn. Activate only as a sorcery.