Moonring Island is a uncommon Land — Island card from Shadowmoor (SHM), collector number 276. Current market price: $0.46 (foil $10.05), TCGplayer market prices via Scryfall.
({T}: Add {U}.) This land enters tapped. {U}, {T}: Look at the top card of target player's library. Activate only if you control two or more blue permanents.