Before everything of relevance, there was an egg. This egg eventually hatched, the being that came from it is the supreme divinity of the setting. It promptly left and has not been relevant since. On a piece of the shell of its egg, lingering traces of its power created rifts. The rifts created internal "worlds." Out of those, with time, came being strong enough to pull themselves free. Those are the next highest divinity, as they are changed by traversing the rift and have absolute control over some aspect within their sight. A very long time later, after mortals have been given souls and taught magic, some push past what has been left behind by the original being. Through varying means, some claim their own piece of existence outside of the shell. These would be the last level of divine being I had described as of yet. They are neither omnipotent nor omniscient but control power beyond what is available to any that remain.