Master of Monster Synthesis - Chapter 279 - 186 Nightmare Level Mutant

In a world where human and monsters relied on mystical fruits and their inner power to fight for dominance, a lost soul was thrown, given the powers from all the other worlds he’s known. But there was a catch; he had no control over what power he would get! With knowledge beyond that of most, he sails his path to the top of the one piece world!

- Description from Novelupdates

Leo is an academic genius who enrolled in one of the top universities in the world for the rich and powerful, but he was born in a common family, which was more than enough of a reason for the other students to mess with him.

In the foreign world, the martial artists dominate the world and the sword of the emperor controls the fate of hundreds of millions of lives! Long Yu, the number one killer on Earth, after dying, takes rebirth in this new world in an aristocratic family of martial artists but faces rejection because he is unable to practice martial arts.

- Description from Novelupdates

In his previous life, Tang Shi was a cannon fodder. For a jerk, he even turned down a blind date his father arranged for him, but finally died in the hands of his lover and half-blooded elder brother.

Before he died, his elder brother told him that the one that always went against him, teased him and used him as a bait was the one who truly loved him, also that blind date his father had arranged for him—Yan Xu.

Feeling regretful?

What would have happened if he hadn’t made that kind of choice from the very beginning?