The Worm "Ouroboros"

"The Worm" is the ancient primordeal beast from which all mortal creatures are descended. The Worm is a super-colossal creature somewhat reminiscent of a worm. Being the father of all mortal things, and the engineer of the cruel laws of nature, the Worm is like a mortal creature. It has innards, teeth and flesh, but unlike its descendants, the Worm is almost impossible to kill, and hasnt been so far. Not because it it immortal, but because it is so enormous, old and so very resilliant and powerful. The worm can speak words with a voice that can bring both nightmares and fascination. The worm is both hated and worshipped by mortals. The Worms truest name is Ouroboros, and he was the first life that sprung from nothing. The first mortal. He dwells far beneath the earth, so far the distance between his kingdom and our surface is equal to our distance from the sky. The Worm lives, and is infamous among gods and sprites as a freak, an anomaly or a vile accident. He was not created, but sprung from the mud and gave birth to all the rest of the mortal lineage. He was the first, but unlike other mortal things, the worm does not age and has not yet died despite the gods opinion of him. He is the master of Atricon, god of nature. His intervention throughout history is as rare as the 4000th year of an era, but as influential as the sun that burns in the heavens.

He is the first and oldest mortal and gave rise to the second lineage.