The Sun

The sun functions as a conduit of a gods power onto its lands. When a creature ascends to godhood they must impart some of their power onto a creature who can act as the "sun". The sun imparts life upun the world and acts as a watchful eye to prevent outside creatures from entering it.

Empet

Empet is both a god and the sun of his world, there is no rule that both cannot be the same but this also leaves him vounerable.

Exceptions and other worlds

Ghullis
The vaadrach of Ghullis ate their sun long ago, giving them near eternal life but leaving their world in an eternal state of darkness and death.

Kadamaar
In Kadamaar all three sons of Iskur share the power of the sun. Because of this kadamaar has three suns.

Alkh
Ra, much like Empet is both an avatar of the sun and a god.