Daemon Prince

From Warhammer 40k

A Daemon Prince is a formerly mortal Champion of Chaos ascended to daemonhood by his patron Chaos God. This is the ultimate goal of the most powerful followers of Chaos, as it gives them immortality and power beyond the reckoning of mortals. However, if the Champion fails in the eyes of their god, their "road to power" ends as they are cast aside and they instead descend into the state of a Chaos Spawn.

Among the greatest rewards of a Daemonhood is immortality. Since they have become creatures of the warp, they can only be banished into the warp, but never destroyed, so each of them is guaranteed to exist until the end of time.

When a Daemon Prince conquers a world in the Eye of Terror, his patron Chaos God grants it to him as his own personal realm. It becomes a Daemon World, a sub-reality in which the Prince becomes a god, where reality is subject to his whim. The natural habitat of a Daemon Prince is the warp; only rarely do they enter the material universe. They are prized by the Chaos forces because unlike true Daemons they have some understanding of the material universe.

The Traitor Primarchs are the most powerful and infamous Daemon Princes, and can easily be distinguished from other princes by their appearances.