Cori Mountain Monastery is a rare Land card from Tarkir: Dragonstorm (TDM), collector number 393. Current market price: $1.93 (foil $3.16), TCGplayer market prices via Scryfall.
This land enters tapped unless you control a Plains or an Island. {T}: Add {R}. {3}{R}, {T}: Exile the top card of your library. Until the end of your next turn, you may play that card.