Lin Tian, the top prodigy among the outer disciples of Lingxiao Sect, is betrayed by his senior brother Xiao Xuan and junior sister Su Yurou. They steal his Pure Yang Dao Body, drain him of all his cultivation, and cast him into the deepest reaches of the Ancient Wilderness of Ten Thousand Beasts: the Bone Burial Abyss.
When he opens his eyes again, he has become a lowly black-scaled grass snake, barely a foot long. Even a mouse dares to take a bite out of him.
At this desperate moment, the Ancient Serpent Emperor System awakens: devour all things, extract bloodlines, evolve without limit. Poisonous frogs, red snakes, demon generals, demon kings: all who dare stand in his way end up in his belly.
From the mud of the Bone Burial Abyss, to the Serpent King's Domain, to the Ten Thousand Beasts Ruins, and on to the Myriad Demon Divine Court, he commands countless beasts and plots his way forward. Using the art of human warfare to lead demon armies, he devours the heavens and the earth, evolving into an ancient golden dragon five hundred zhang long.
Ten years in hiding, then one day he emerges.
The enemies who once stole his Dao Body still sit in high places within Lingxiao Sect. With a tide of a hundred thousand beasts at his back, he crushes their gates and repays every drop of blood, one debt at a time. He takes back his Pure Yang Dao Body intact, and leaves none of his blood enemies alive.
Later, when the demonic abyss between heaven and earth splits open and all the races face annihilation, the serpent that crawled out of the Bone Burial Abyss coils atop Ten Thousand Beasts Mountain, becoming the final line of defense for the world.
All races come to pay homage, calling him the Holy Emperor.
