The so-called Dark Worlds were a group of planets that the genetic terrorist Zeta Magnus had claimed as his kingdom. They were all located somewhere in the Unknown Regions of the galaxy. Magnus called the Chiss Ascendancy, the Ssi-ruuvi Imperium and the Sorcerers of Rhand his neighbors. The terrorist's seat of power in the Dark Worlds was the Rennek palace.
- SkyeWalkers: A Clone Wars Story (First appearance)