MTL - Release that Man - Chapter 413 Object

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

Due to a conspiracy, she was brought back from the countryside to marry him as a substitute bride to bring good luck.Ugly and untalented in medicine? Let's see how she magically heals and showcases absolute beauty!The socialites of Bayside, whose faces were swollen from slaps, complained to Mr. Crawford...Wait a minute, her frail husband turned out to be a business tycoon capable of dominating everything. She rushed over to hug his leg, “Husband, weren't you on the verge of being incapable?”He wore an expression as if he was going to devour her, “It seems I must physically show you whether I am capable or not!”

Seven years ago, at a charity gala, she unintentionally became his cure and ended up pregnant with fraternal twins.

In the continent of Chang’an humans had lived as livestock and slaves to the Primordial Beasts. These beasts were ferocious, bloodthirsty and overwhelmingly powerful, but even so, the humans managed to prevail in the face of despair.