Command Tower

{t}: Add one mana of any color in your
commander's color identity.

In the dying days of the Orokin, with forums and promenades still blood-wet from Tenno betrayal, a colossal Sentient descended upon ancient Er, falling from distant stars to deliver upon Orokin a terrible and final ruin. Tower upon Tower fell to its weapons, but one withstood. The Tower of the Unum.