Sunken Citadel (Extended Art) [The Lost Caverns of Ixalan]

Set: The Lost Caverns of Ixalan Type: Land — Cave Rarity: Rare Sunken Citadel enters the battlefield tapped. As it enters, choose a color.{T}: Add one mana of the chosen color.{T}: Add two mana of the chosen color. Spend this mana only to activate abilities of land sources.