Description: The Defel (colloquially known as Wraiths) are barely visible beings who appear to most other species as shadows, re-enforcing the misconception that they are chameleon-like beings or "living shadows". Typically, they are employed as mercenaries or guards. They are from a large, high-gravity, seldom-visited world orbiting the ultraviolet supergiant Ka'Dedus. Af'El has no ozone layer and ultraviolet light passes freely to the surface, while other light wavelengths are blocked by the heavy gases in the planet's atmosphere. Thus, all life forms on Af'El can only see in ultraviolet light ranges, and are blind to other wavelengths of light. Af'El is the home world of the Defel, or "wraiths," whose bodies absorb visible light, giving them the appearance of shadows. The Defel live in underground cities to escape Af'El's violent storms. A main export of the planet is the metal meleenium (used in durasteel), which is only known to exist on Af'El.