Love History Caused By Willful Negligence - Chapter 37Vol. 1 :

"So, that's how my life ends, what a waste of time it was...".
These were the last thoughts of a young man, shot by accident in a fight between local gangs. Little did he know that he would soon wake up in another world, a world of cultivation!
This is the story of the whoreson of a wealthy family, of a transmigrator that had no purpose in his previous life, of a demon that will make power his reason to keep on living.
Noah Balvan, after he transmigrated, will have to fight against his social status and the many difficulties of the world he was reborn in to obtain the power to stand free in the sky above anyone!

As a long-time Naruto fan, John downloaded what was advertised as the latest and most highly anticipated Naruto mobile game. However, as soon as the download finished, a blinding light enveloped him. When he regained his vision, he was shocked to find that he had become the orphan of Konoha—Haruto Itsuki. To make matters worse, upon his arrival, the Nine-Tails Rebellion began. Now, he must find a way to survive and navigate the chaotic ninja world during one of its most dangerous and turbulent times.

Wang Yi was reborn into a world that swallowed the starry sky. After eighteen years of ordinary and extraordinary, he finally met the conditions on the eve of graduation from high school, activated his own golden finger, and signed in for the first time.

[Ding, congratulations to the host for successfully signing in, signing in for the first time, and signing in to the earth, special rewards will be given to reward the first karma of the Nine Tribulations Secret Code! 】

[Your genetic level has increased three times! 】

“…”

- Description from novelbuddy

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