MTL - Quick Transmigration Second Female Lead is also Black on the Inside - Chapter 15 First Love Reversal Strategy (15)

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

Tame or be Tamed?... How about choosing to Devour the enemy Beasts and Tame the Beast within you?Luel, a 25-year-old guy who suffers from early retirement due to his poor body condition caused by too much working stress at his past jobs, decided to livestream his days of playing the famous VRMMORPG RAIDS ONLINE.It was only supposed to be a pastime, a recreation activity for Luel to gain his confidence to become a part of society once again, and a way to possibly earn some income before his savings reach not just zero but negative as well.However, as Luel became stronger as a player and more popular as a live streamer, he slowly realized and uncovered the truth behind what he thought was just a game.

For ten years, Ryn lived in quiet exile with his wife Mira, far from a world overrun by supervillains. But when the flames of chaos reignite, he’s forced to return to the battlefield, stronger and deadlier than ever.By his side is Mira, his unwavering partner—devoted, ruthless, and hiding a darkness Ryn can't see.Enemies rise, old ghosts return, and war looms on the horizon. Ryn seeks justice, while Mira seeks to protect him... even if it means drowning the world in blood.Let them come.