Frostboil Snarl is a rare Land card from Strixhaven: School of Mages (STX), collector number 360. Current market price: $2.51 (foil $3.08), TCGplayer market prices via Scryfall.
As this land enters, you may reveal an Island or Mountain card from your hand. If you don't, this land enters tapped. {T}: Add {U} or {R}.