Iridescent Envoy

{t}: Add one mana of any color. Spend this
mana only to cast chromatic spells. (Chromatic spells have only colored mana symbols in their mana cost.)
"Enlightened by the glassy-eyed story man,
they wander like vagabonds, embracing all that dances under the resplendent mackerel sky."
—The Watchful Recounter