Tyranny of Steel - Chapter 17: Immoral Temptation

After his qi center is destroyed, a martial arts instructor of the Blood Demon Cult is assigned to learn and research the martial arts of four captured murim masters. However, when the Cult betrays him and decides to kill him, he fights back and everyone in the Cult dies, including himself.He then mysteriously wakes up in the body of Baek Suryong, a young martial arts instructor in the rural countryside with a disease that will kill him within three years. He realizes that the martial arts he had learned holds the key to healing his new body’s illness, but in order to do that, he needed money. A LOT of money.Baek Suryong thus embarks on a journey to become the Star Instructor of the Azure Dragon Martial Arts Academy, and earn enough money to save his own life! Perhaps he would even manage to educate some kids along the way…

He—an enigmatic and cold-blooded soldier with a mysterious background.
She—a ruthless and bloodthirsty spy.

Luo Zheng is at the bottom of the Luo Clan hierarchy, despite his family being the founders of a power refining technique that could instantly defeat any opponent.

One night, enraged by unfair treatment from a family steward, Luo Zheng burns the family records. In doing so, the hidden magic in the book engulfs him and Luo Zheng becomes a new skilled fighter. Fleeing his home and despicable clan, Luo Zheng must learn to harness his powers to rescue his younger sister while his own cousins are on his pursuit.

- Description from Novelupdates

The Dayan Empire had enjoyed a reign of over thirteen hundred years.The Emperor was critically ill, the Crown Prince was regent, local immortal sects were entrenched, and central authorities were vying for power in the chaotic court.Upon waking,Xu Yuan saw a dilapidated temple in the mountain rain at night,saw the eerie, broken-armed stone Buddha,and,the mysterious woman by the fire, her face veiled by thin gauze.......He had become the ultimate villain's third son, of pure heritage and legitimate lineage.The fake villain, dressed in fine garments and enjoying luxurious feasts, simply waited to be humiliated, while the real villain was caught by the Big Ice Lump and dragged across the world in flight from the start.Golden finger?Only a fake villain relied on a golden finger to get rich, a true villain dared to confront a bleak life!“If Heaven had not birthed me, Xu Changtian, villains would be as eternal as the never-ending night.”“........”