Nykthos, Shrine to Nyx - 223 R THS Foil

{T}: Add {C}.
{2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

rare
Legendary Land
From the Magic: The Gathering set Theros.