Between the God Ancestors and the entity known as Talos Stormcrown, there have been stories of Mortalkind ascending to a throne of Divinity. Despite mortal-kind's points of view on the matter, it is still a point of debate. How does one ascend to godhood?
The path to godhood is not a single road, but one of many paths; many ways. Each way is different for each person, and no one way is better than another, it is simply what is possible and the chosen path of those that wish to ascend. The path, regardless of the chosen steps, is known as the Task of Ascension and is often a very dangerous and tedious route. A creature must first establish a connection to the divine by tethering themselves to the planes, and then they must somehow obtain a divine spark and hope their form can withstand the transition. The process is a two-step one.
First, to become an Unknown: To become a god, the first step, and by far the easiest, is to become an Outsider.
Being connected to the energy of the planes -- body and soul -- is to be an Outsider. These creatures range from the Angelic to the Fiendish; Dremora, Imps, Xivkin, Auroran, etc.; creatures who are tethered to the essence of the plane from which they originate. There are several ways to become an Outsider, from class features, swapping bodies, dying and being ferried to the afterlife and then resurrected, or contracting bizarre, inter-planar diseases. But, for those who have not been born or made into an outsider, there exists a Ritual of Transfiguration that grants the outsider type to those who undergo it.
Second; once you are an Outsider, the ways to rise to godhood become numerous.
- Find and Kill a god.
The most direct way is to find and kill another god, stealing their Divine Spark as they perish. Killing a god is never easy, but if you manage to successfully kill the god, then within 1 minute of their passing, you can attempt to absorb their divine spark into yourself. This is an ultra-violent process that blasts you and the surrounding area with a massive amount of super-charged energy. This is a very risky and dangerous method but by far the most direct. - Genocide.
Do you want to be a dark god? They say everyone has a little bit of divine spark in them, so if you kill everyone and everything, you can gather the individual sparks and forge for yourself a new spark. This vile method requires the mass death of many creatures all at the same time within the space of a week, with a spark focus to house the wandering souls of the dead before they depart for the afterlife. - Worship.
The far kinder and more gentle means of godhood is earning your worship yourself. You must have the complete, fanatical devotion of a great mass of willing and not mind-controlled people gathered in a week of mutual fervent prayer following whatever dogma you see fit, with a spark focus to gather the prayers. The synchronized efforts of hundreds to millions of worshipers are enough to charge the device. - Bestowed Godhood.
Rarely, you may parley a favor from the gods and they will grant you godhood as a gift. This method, while both rare and unpredictable, is the safest, as there is never a threat of explosion. Deities are reluctant to gift divine rank, as they lose it from their own power. - Ambrosia.
The food of the gods; rare even amongst the divine. The consumption of ambrosia was typically reserved for divine beings, as it is attributed to have vast healing and regenerative abilities, and was known to bestow base divinity to those who partook of it. This delicacy appears as a type of solid gold fruit, varying from apples and grapes to other similar types of fruits. When split open, these fruits seep out a thick, glowing golden syrup which is often distilled by deities into a divine drink known as "Soma" - Artifacts.
Some artifacts of immense power that were used, and sometimes even created, by the gods may yet hold remnants of their divinity through mere contact. These items may even be spark focuses themselves or, when adorned or used by a creatures, could even bestow a Divine rank of power upon them so long as it is in their possession. Such items could be an Ancient Crown of a beloved King, a Magnificent chalice that once touched the lips of a god, or an Extravagant Sword that once drew a divine's ichor from their holy body.
Once you receive a Divine Spark, you undergo an Apotheotic Ascension, a metamorphic state in which a being is considered both mortal and divine at once. Upon a successful Ascension, you acquire a Godspark, and you being to raise through ranks of Divine Power.