MTL - Mystery Descends: My Exchanges Are Not Equal - Chapter 6 ,upgrade! Soaring strength!

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

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

Qiao Chen was mysteriously transmigrated to the interstellar era. As an adult from his original world, he was forced to grow up all over again in this new one. Now, out of nowhere, he was requested (forced to take on) with the inexplicable task of jumping from world to world to save the high general’s soul.

Throughout his journey, Qiao Chen finds that these worlds and bodies he’s jumping in and out of are his previous reincarnations. Whether or not these all culminate into coincidences or a predetermined destiny, there’s things that must be done while completing the main task:

-Avenge his past life

-Take revenge

-Fulfill past regrets

-Realize those lost dreams

-Make up for past failures

Since God has given him these opportunities to rewrite his fate, why wouldn’t he be pleased to start-over?

- Description from Novelupdates

Zend Wolfled, a fallen nobleman known to the world as the most hated man in the world. And the main villain in a famous romantic fantasy novel.He was feared and hated because of what Zend had done so far without knowing what caused Zend to do these things.Zend has a secret that the world doesn't know that he is a Reincarnator and Tranmigrator. Zend knows that he is a villain character from a romantic fantasy novel, but he lives on his own terms.In the end, Zend only lived as a name labeled a villain by the whole world.Until the day comes, Zend was the last human to survive the appearance of The Evil One.The Evil One and The Angel saw the potential in Zend and sent Zend back to time Zend younger, second change-In this life, Zend will be the hero and villain of this romantic novel once again. Zend will engage with this entire world. Meet Transmigration, Reincarnated, 7 Sins, 12 Color, 6 disaster and Apostle.Zend Wolfled regret, hatred, anger, sadness and revenge will begin once again...