Gods are a form of consolidated power in Buhukiea, like the former Titans. Gods represent a less primal view of certain ideas and aspects, and often control a more 'literal' concept rather than something like fire, in the case of Rakarn.
The title of 'god' is transferable. If another being demonstrates a higher understanding and finesse of the concept in question, the title will automatically go to that individual. This happened in the case of the Ascended, and partially in the case with Haeihlseth Magayak.
The original Gods were made specifically as such and are unique entities, but they can still lose their title.
Gods have a few common 'abilities':
None. They have their own domains.
Gods were created after the Titans destroyed themselves.