My Shadow Monarch's System - Chapter 10: A Purpose.

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

How does a half-grown mountain village boy like me end up bizarrely becoming the grandmaster out of nowhere?Source: Web...

To correct the mistakes of his past, a young man is forced to narrow the space between science and witchcraft, as he ventures on a quest to save his world from complete destruction.

Every night, he prayed. To every god on Earth.“Please, transport me to a fantasy world when I wake up tomorrow.”And then one day, his prayers were answered.Just not in the way he had hoped for.