Gods

Gods are entities of unbelievable willpower, capable of bending reality itself to their will. They exist on a level far above anything resembling mortality. It is not rare to find a god that simply willed themself into existence, and once they are there it is impossible to truly get rid of them. Even if they are killed they almost always come back, either in full form or in some altered form.

Birth?
Gods can come into existence through many means. The most powerful of them are rumored to have simply willed themselves into existing, though they can also arise through routes similar to spirits. Some of them are actually spirits, ascended through old age and amassed power.

Some gods are the children of other gods. Some are the children of cataclysmic events or incredibly powerful forces acting on the universe.

To list a few examples here:

Gallus is a greater god, and brought himself into existence through sheer will.

Tephim was born from a meeting between Gallus and another god, Thaldera.

Ohdezar was born the first time Luthim yawned.

Oizys was born when Ohdezar died from a curse in her blood, and fell asleep in the river Styx.

Hennette was born when the fallen world of Ghajadokesh fell into its star.

Erida was a mortal who ascended to godhood by forming a pact with outsiders, joining with one, then eating three gods. It took her around ten thousand years to accomplish this.

Peidron was originally a tree spirit, but by surviving many ages it grew into a forest spirit, then a guardian, and after milennia naturally found itself as a god of the forests.

Gomell was born when his world came into existence from the Inferno.

Nixniunibulb was originally an elder spirit, but gathered and has kept enough followers to be considered a god.

Tremelon was born from the collective prayers of the once doomed people of the world of Nathagar.

The nature of a god
Gods, like spirits, are whatever they want to be. For example a god of fire is a god of fire not because they were born from fire but because they adore everything about it. So as expected, those are the forces they are interested in. Likewise, what a god is can change over time or as a result of some significant event. Luthigan the sun god became Luthigan the ashen god after her fury destroyed a large number of innocent people.

Some gods change completely over time, like the god of respite, Ohdezar, who became fascinated with the illness that had killed her, and then fell asleep in the river Styx thinking about it. When she woke up she was reborn as Oizys, a goddess of pain, disease, and misfortune.