Ruins of Oran-Rief is a rare Land card from Oath of the Gatewatch (OGW), collector number 176. Current market price: $0.31 (foil $0.42), TCGplayer market prices via Scryfall.
This land enters tapped. {T}: Add {C}. ({C} represents colorless mana.) {T}: Put a +1/+1 counter on target colorless creature that entered this turn.