MTL - Sick Wife - Chapter 107 , extra seven

I want an S-Rank skill too! I want it so badly, I could die for it![You have awakened an S-Rank skill.] [But it only works when you die.]Eh !? WHAT IS THE POINT OF GETTING ONE IF I DIE !?

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!

In novels with a stud there is always a Senior Martial Brother like this:

In the early stages of the novel, his innate talent is high, his cultivation is good, his appearance is handsome, and he has an intelligent, cute younger Martial Sister as a fiancée.

In the middle stages of the novel, he is caught unprepared and defeated by a young disciple (the protagonist) in the sect who’s hardly remarkable at all. From then on, he falls from his godly altar and loses his brilliance. Even his young Martial Sister leaves him for someone else.

In the late stages of the novel, he continues to turn dark, going down the Demonic Path and becoming the major villainous boss. However, the protagonist still ruthlessly defeats him and his soul is eternally sealed.

Once Qin Mo opened his eyes, he discovered that he had become this Senior Martial Brother.

- Description from Novelupdates

Thalion’s life as a marine biologist was modest in wealth but rich in joy and fulfillment. The arrival of the system sent everyone on Earth into a tutorial while merging it with four other planets. Not everything was bad, though. The system granted people magic and even ways to defy time itself. For now, everyone struggles to survive the tutorial, which has become more of a slaughter trial than a learning experience.If you like stories with Shapeshifters and Bloodmages. Check this out!!! A post-apocalyptic LitRPG series inspired by The Primal Hunter, Defiance of the Fall, and Elden Ring.Release Schedule:Five chapters a week. (Wordcount between 2,000 and 3,000)Also, this novel is posted on Royal Road and Patreon with Patreon being up to 60 chapters ahead of the Royal Road release.What to expect:-Multi-POV Storytelling but mostly main character-Adaptive Magic System – The magic evolves based on the wielder, making every spellcaster’s abilities truly unique.-No harem-Entities Beyond Humanity-Expansive Worldbuilding