First Demonic Dragon - Chapter 582 There Will Be Blood

[New Hit Book] The king mysteriously withdraws, and just when everyone breathes a sigh of relief, they are unaware that an unprecedented storm is about to unfold!

Reborn in the Naruto world, Shin Uzumaki finds himself in the doomed Land of Whirlpools. As a member of the Uzumaki Clan! Trapped in a world filled with war, betrayal, and unimaginable power, Shin’s survival seems impossible.. Until it isn’t!![Ding! Replication System Activated!][Daily Login Reward: Common Replication Card.]​​​​​​​[Newbie Gift: Perfect Sage Body—​​​​​​​Adamantine Sealing Chains​​​​​​​—​​​​​​​​​​​​​​Four Symbols Seal​​​​​​​]With the power to Copy any Ability—whether it’s the Kekkei Genkai or Rinnegan or Forbidden jutsu—Shin begins his journey to dominate the Ninja World. [First task: Save Kushina and prevent the destruction of the Uzumaki Clan.]

Being the author of the breakout novel, Gates of The Primordials, Jarren Fletcher did not care about the constant critiques claiming he had a habit of treating extra characters as mere plot devices, creating and then dumping them once they’d served their purpose.To Jarren, it didn’t matter. Extras were just that—extras. All that mattered was the main character.But Jarren never expected to wake up in his own story, reincarnated as one of the meaningless, disposable extra characters, Deremiah Morcant—a coward who took his own life to escape the perilous challenges of the Gate Trials.Now, Jarren has to face those deadly challenges himself in the body of a weak, insignificant extra. He must find a way to survive in the rules of the dangerous world he had created, whilst also trying to save it.But time is running out. The next Wave is coming, and so are the paragons.

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