Echoing Cavern
Land — Cave
As this land enters, choose a creature type. : Add . : Add one mana of any color. Spend this mana only to cast spells of the chosen type. Exhaust — , : Seek a card of the chosen type.
colorlessNot legal in Commander
Land — Cave
As this land enters, choose a creature type. : Add . : Add one mana of any color. Spend this mana only to cast spells of the chosen type. Exhaust — , : Seek a card of the chosen type.
colorlessNot legal in Commander