Tensei Shitara Slime Datta Ken (WN) - Chapter 400

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

This is a brand new story.

Survive the darkness, see the light

There is no right or wrong, it just depends on which side you are standing on.

To be a god, or to be a man.

To be good, or to be evil.

Just what is…the highest order of weapon that humanity has?

——————

After a great catastrophe struck, the world was set back many years and humanity started living in anarchy.

With time, society started building up again and people were now living in walled strongholds and fringe towns across the land.

Humans have also become distrustful and ruthless in an unforgiving society where the strong survive and the weak are eliminated.

Growing up in such an era, Ren Xiaosu had to fend for himself.

After an incident, he gained supernatural powers…

- Description from Novelupdates

She had never expected that she would slept with her deadly enemy,but it turned out to be a good match for both of them.

while after marriage ,his indifference finally angered her.

You damn bastard!

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