DnDWiki:Ka'jk'z

Ka'jk'z is the legendary name of the neogi homeworld. In the neogi creation myth, Ka'jk'z was the place where the brain of the neogi creator deity, Ka'jk'zxl, landed after he was killed by the lesser neogi gods. The neogi were apparently born from the brain of the deity. They simply abandoned their world after being informed by their gods of their destiny to conquer all the crystal spheres.

Dragon #350 tells a different story, citing rumors that the neogi homeworld was the first to be destroyed by the clockwork horror after the world of the Lost Ones.

Lords of Madness cites similar rumors, claiming that "some sages" believe the neogi homeworld no longer exists.