
Drafters who have broken the halo are called wights, and they descend into madness if they are not Freed those who run from the ritual Freeing are hunted to their deaths.

In exchange, they agree that once they exhaust their ability to safely use magic-signaled when the halos of their irises are broken by the colors they draft-they will be killed by the emperor, the Prism, in a ceremony on the most holy day of the year: Sun Day. Trained at the empire’s capital, the Chromeria, drafters lead lives of privilege, with politicians and powerful families vying for their services. The process is known as drafting, and each drafted color has unique physical and metaphysical properties and innumerable uses, from construction to warfare. In the empire of the Seven Satrapies, some people are born with the ability to transform light into luxin: a physical, tangible substance that exists in one of nine colors.
