The Return of the Legendary All-Master - Chapter 279

Bai Aoxue, the best mercenary in the 21st century, is accidentally sent back to the Chengxi Dynasty in Great Continent due to an explosion in her mission, and trapped in the first daughter of Prime Minister. After her rebirth, she is set up by her father to marry the 5th prince Jun Yeyan who wears a mask all day long.
In the face of bloodthirsty enemies, discord between brothers, collusion among courtiers and invasion of enemy state, can Bai and Jun resolve the crises? What will happen to their political marriage? How will the fierce battle for the throne end?
With many twists and turns, the book brings you to experience palace revolution, love and hatred thousands of years ago.

- Description from Novelupdates

Have you ever read a story? So stupid and senseless that it makes your blood boil and makes you pity even the villain of the novel. if you haven't that's fine because our protagonist did.“FROM WHERE THE FUCK DID NTR COME FROM?”He threw his console controller on the which did a cartoonish bounce and formed a bump on his forehead.------“Wait! What's this place!?”The moment he woke he found himself in a strange location never been visited by him ever before.------“No!! No!! No!! How the hell did I end in the body of this cucked villain! Why did I end up in this body!!”He lamented when looked at his face in the mirror that got beaten blue by the protagonist of the game.------“Don't worry, Riech. I will fulfill your and fucking kill the bastard and fuck his mother and avenge you!”He clenched his fist and gritted his teeth in anger vowing to take revenge.

In this world, orphans or just anyone without any hope for this world can apply to become a “walking target”. Their sole purpose is to be a practicing dummy for the students of the sect who train to become “Demon Hunters”. These students need “walking targets” to test their training on living, walking beings of flesh and blood.
In exchange, they will be provided with food & shelter.
Their existence value is lower than a slave, but if they manage to survive a few years they can receive a life long pension.

Xiao Han is such a “walking target”. One time he witnessed a powerful Demon Hunter disposing a demon. When the demon died, a fragment of the demon that managed to escape entered Xiao Han’s heart. No one saw that, and even Xiao Han himself only felt some discomfort for an instant.

But that thing in his heart soon gave Xiao Han visions, and the first one is of a cultivation method which allows Xiao Han to absorb damage to enhance his body. A perfect cultivation method for a “walking target”.

- Description from Novelupdates

Mason was a mercenary, until the day he died on a mission after being betrayed by his unit.