Kuranes was a great dreamer and made frequent visits to the Dreamlands. In the waking world, he was of landed gentry in Cornwall, but as his fortunes declined he retreated into fantasy and drug use, eventually dying impoverished and homeless. In his dreams, he created the city of Celephaïs, the valley of Ooth-Nargai, in which Celephaïs was situated, and presumably the cloud city of Serannian, which was connected with Celephaïs. After he died he became the king and chief god of Celephaïs. He didn't care for the pomp and grandeur of Dreamland court life, and preferred to live most of the time in a nearby area he created to resemble the house and land in Cornwall where he had lived as a boy.
He is the only dreamer who has gone to the outermost void "where no dreams reach" that is the court of Azathoth and survived with both life and sanity intact.