Origin of Serpents and Serpentfolk

One of the texts that deviate the furthest from the known and excepted understanding of the grans pantheon are carvings and vellum sourced from the skin of unknown reptiles found in ruins located in one remote region of the eastern side of the continent. The texts feature two previously-unknown languages and a third that is enough of a cousin of Draconic as to be deciphered with some efforts.
The most prevalent subject of these texts are of a pair of gods in a very small that bears no resemblance to the gods and their varients as they are understood today. The two most important gods in this pantheon are a pair of siblings responsible for all living things in the world, the gods of Life and Death, which seem to be referred to as such and not by proper names from reverential reasons. The pair kept all magic to themselves, constantly warring between themselves over control of it. Their fighting, with Life constantly gushing forth torrents of self-sustainaining motion and multtplication, and Death constantly destroying and rotting it, was churning up and causing unimaginable chaos for the inhabitants of the world. Of course, such miniscule things were far beyond their notice.
The other gods were much smaller and only held a fraction of the strength that Life and Death had, as they weren't allowed to access magic either. They longed to overthrow their cousins, but had not choice but to wait until some opportunity presented itself, or they would be destroyed immediately.
Whenever one of the superior gods were wounded, the blood and viscera that spattered down to the earth caused new things to spring forth. In the case of Death, poisons and diseases birthed themselves from the droplets of blood, while Life's blood caused whatever it landed on to become various new plants and animals. Many stories exist concerning this time of primordial history and all the things that were created during it.
Finally, after one tremendous battle, Life lost one of their claws. Retrieving the claw once it hit the ground, the lesser gods now had something that they knew could wound the greater gods. They combined their talents to work the claw into a grand weapon, and set out to defeat their powerful cousins.
The lesser gods attacked Life first, as they had more vitality but were not as overtly dangerous as Death. Teaming up for the attack, they ambushed Life as the greater god took a moment to rest from its latest battle with death. Knowing that Life could not be permanently killed, but at least needed to be drained of power, they bound Life with magical chains that the greater god would not be able to break if they were weakened, and they used the blade made from Life's own claw to slit its throat.
Life's blood gushed forth in an unstoppable torrent out into the empty ocean, which immediately began teeming with life. This torrent of blood held Life's own power in it, and the undying god never stopped bleeding but was now too weakened to free itself. With the greater god now at their mercy, the lesser gods were able to use its infinite stream of blood for their own purposes, as well as cut off the rest of Life's claws to fashion into more weaponry. Arming themselves with the many enchanted claws, the lesser gods became the first army and created War, as they marched upon Death.
After its own rest, Death rose up to meet what it had expected to be Life for another round of battle, but was instead faced with a horde of well-armed gods. Death fought with devastating power, killing many of them, but as we all know nothing kills in force as quickly as War. So, Death was torn into pieces, become several smaller gods now on par with the rest of the lesser gods, and the rest of its great body was shredded to ribbons.
These strips of flesh fell into the river of Life's blood and instantly animated, becoming the first snakes, snakefolk, and other serpentine creatures. The flesh of Death had still been dripping blood, so many of these serpents posessed all manner of venom and resistances to poison and disease.
Thus, this is how the serpents of the world are considered the honored children of Death, made of its own body and blood, little more than strips of flesh but capable of bringing death more swiftly and dramatically than creatures many times their size.