Sheltered Valley is a rare Land card from Alliances (ALL), collector number 142. Current market price: $0.80, TCGplayer market prices via Scryfall.
If this land would enter, instead sacrifice each other permanent named Sheltered Valley you control, then put this land onto the battlefield. At the beginning of your upkeep, if you control three or fewer lands, you gain 1 life. {T}: Add {C}.