He is Lovestruck in the Revenge - Chapter 59 - Episode 058 Wanting to Bite Xie Shangs Mole (First

Transported to the chaotic era of warlord conflicts, Xu Guang is displaced and ends up begging.By chance, he lands a job in a rich family, responsible for taming the mammoth.[Name: Xu Guang][Current Job: 1. Beggar Lv5 (50/600). 2. Elephant Envoy Lv0 (50/100)][Professional Talent (Elephant Envoy): Enchantment (When you form a bond with your closest Giant Elephant partner, you will receive the elephant's favor and your strength will be amplified by the Giant Elephant)]

Kenichi Yamada was a 35-year-old salaryman. As a hardcore game enthusiast, he was saddened by the modern trend towards casual games.So, when a site claimed to be “for people who like to do things the hard way,” he just couldn’t resist. Thus, he was reincarnated into another world as Allen, playing on Hell Mode.This is fantasy light novel about Allen’s journey as a summoner.Reincarnated as a serf, he starts from nothing.His journey begins with absolutely no knowledge of the world around him, just like those games he played 10, 20 years ago.

The Red Dragon came from the vast wild wastes, coveting all the strength in the world. It once had countless titles: Mountain's Wrathful Flame, Infernal Calamity, Crimson Emperor, Ashen Dragon......The world trembled under the shadow of the giant dragons. He stirred up the craze of the magic industrial revolution; in the empire he established, Wyverns roared, artillery fired in unison, and steel beasts appeared in the sky and on the land, while disasters from another world rampaged everywhere.“Submit, or die.”Cassius spread his wings, blotting out the sun, and gazed down at the trembling humans, elves, and dwarves below, saying thus.......It is a story about a Red Dragon with a player template conquering, ruling, and transforming an alternate world.(Pseudo of DnD, The Fourth Calamity, Red Dragon)

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