Cascade City

When Cascade City enters the battlefield, if you
have a full party, create a Treasure token. (Your
party consists of up to one each of Cleric, Rogue,
Warrior, and Wizard. A Treasure token is a colorless
artifact token with "{t}, Sacrifice this artifact: Add
one mana of any color".)
{1}, {t}: Add one mana of any color.
{t}: Add {c}.