Godless Shrine is a rare Land — Plains Swamp card from Ravnica Allegiance Promos (PRNA), collector number 248p. Current market price: $10.13 (foil $11.74), TCGplayer market prices via Scryfall.
({T}: Add {W} or {B}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.