Hashep Oasis is a uncommon Land — Desert card from Outlaws of Thunder Junction Commander (OTC), collector number 299. Current market price: $0.24, TCGplayer market prices via Scryfall.
{T}: Add {C}. {T}, Pay 1 life: Add {G}. {1}{G}{G}, {T}, Sacrifice a Desert: Target creature gets +3/+3 until end of turn. Activate only as a sorcery.