Being Able to Edit Skills in Another World, I Gained OP Waifus - Chapter 59: Shrine Maiden, Hero and Slave Connection Experiment

A world where God will grant abilities called Skills to those who come of age. The protagonist, bestowed with two skills, uses them and rises to an existence called a hero.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Introduction One:When Jiang Shouzhong finally resolved to help his wife vanquish demons and uphold the righteous path of the human world, he saw nothing but piles of white bones. Standing atop the battlefield of Asuras, the demoness was none other than his former wife.——Introduction Two:Above the temple halls, beneath the rivers and lakes, where the world of humans and demons divide, along the righteous and evil paths, countless charismatic individuals weave lives full of fireworks, unable to exhaust the tales of snow, moon, wind, and flowers.Kings and generals, peddlers and pawnbrokers, scholars and swordsmen, fiends and phantoms, they are all but pages in a book—each of varying thickness, some with twists and turns, others dull and ordinary, filled with ups and downs, joy and sorrow, or a mix of good and evil, with causes and effects unending.And the book of Jiang Shouzhong's life is undoubtedly the most captivating of all.——

I was a genius in the Earthen Plane.