A Phenomenon Even Primordial Gods Fear
There are a few things that even the Gods fear, so few I can count them on both hands. One of these...is when someone is in pursuit of power beyond mortal comprehension; a sinister and twisted form of necromancy. One who does not only attempt to bring back the souls of the living once more, but to bring life into concepts themselves as well. To create their very own mantle and defy reality itself as they see fit. In such pursuits of power, what is created are only falsehoods. A false fantasy. A false reality. A false god. And when I saw it that day, fear overtook me that I did not remember...not since the rule of the Ancients.
- Elder Demon Ev'kiilos Zanii'vol
Among the many phenomena that occur in the cosmos, there are some that are unnatural and so powerful that they can literally break reality. Reality Breakers as they are called, are often seen as events that even the The 5 Primordials fear, and rightly so. One such phenomenon is the False God.
Most people, if not all, only know that Necromancy is the ability to bring life back into the dead. A magical ability that is highly frowned upon and deemed forbidden by most Planes of Existence. Already a difficult and dangerous feat, necromancy is indeed the ability to raise the dead, however, there exists an advanced form of necromancy: val'krono'niir in Lazan'kel (Ancient Demon language) and gafriil a velra in Gmeshajin (Old Angelic Language). This form of necromancy has no formal name outside of Infernus and Paradiso.
Val'krono'niir, also called kolkul'shiiniir (necromancy of the unspoken in Elder demon) for demons and devils that know it, goes beyond raising the dead. Instead of simply giving life to a dead being, this form of necromancy seeks to give life into something that was never alive in the first place. A concept that is supposed to be beyond mortal understanding. A concept only a deity is supposed to understand. But, there are some that have unlocked the secrets of kolkol'shiiniir.
Normally, the idea that giving life to something that was never alive in the first place is counterintuitive. However, when thinking beyond logic, in what constitutes "life," the idea is not so absurd. Indeed, there are some things that can be given life that normally was never alive nor dead, such as concepts themselves. A necromancer seeking such power will know this and use this in their pursuit of power.
Kolkul'shiiniir for those who know of the power, know that anyone seeking to fully unlock its secrets has one desire: to create a mantle. But mantles can only be properly created by a deity. A mortal attempting to create their own mantle will only fail and twist and corrupt the mantle.
Creation of a False God
The creation of a False God begins once a mortal attempt and eventually succeeds in giving life to a concept. The concept can be anything, but throughout history, the concept given life has always been something dangerous. And although this is the first step to creating the mantle the necromancer desire, they would have already corrupted the concept. Concepts, on their own, are the way they are by decree of a deity. When a necromancer pours their ideas into the concept, they twist it into something unnatural to the Universe, corrupting the concept. The first step into the creation of a False God, the False Concept.
Once a False Concept is created and given life, it needs a host. But a necromancer will know that no mere mortal can contain concepts; things of such massive amounts of knowledge, that should mortals intake it all at once, it would overload and ultimately destroy the brain. Instead, a necromancer uses a host body to contain the False Concept, giving the host a new life alongside the knowledge of the concept.
In a flash of extraordinary light, the host body is brought back to life. However, because of the corruption of the False Concept, the host body itself becomes a sentient being of corruption as well. Instead of returning to life as typically as one does with necromancy, something else happens. The host body begins the process of the next stage of becoming a False God: Transfiguration.