In the World of Sword and Magic as Space Marine - Chapter 60: The Protagonist

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.

A young boy named Chen Zong got lucky and found a mysterious Sword Seal. With the help of it, he rose to be a God in Sword who defeated innumerable top talents in all universes from a remote borderland.

- Description from Novelupdates

Young genius Ren Zhong, suffering from a terminal illness, chooses the human cryonics project. Upon awakening, he finds himself in a desolate wilderness, beneath a gigantic blue sun and a duo of silver-white moons. On this unfamiliar planet, relying on the resurrection to rewind time and accumulate experience, Ren Zhong is determined to become a warrior. After experiencing betrayal, being wanted, and judged, he resolves to rebel against this unjust world and establish a new world order through war.Compress infinite time into a moment; anything can happen.Rising from insignificance, walking the seams of time, reversing billions of years of enslavement.This is the story of an immortal man and his comrades breaking the shackles of fate.

The King Of Assassins was a monster that reigned over the world of hitmen for long years. He was the absolute peak that no other being could reach. His name reached the ears of every powerhouse in the world and sent shivers through every human.

Yet, his legend came to an end suddenly when he died in unknown circumstances.

However, instead of disappearing forever, he was given another chance in another world by the goddess of reincarnation. It was the world of an old book that he read back in the time. A world where everything was possible, where humans could reach new heights that were impossible in his old life.

But, this place didn't seem to be normal as it carried a huge surprise that will make his journey seem all the more interesting.

The Goddess of reincarnation wasn't as holy as anyone would think. She was nothing but a twisted being who found a toy to play with. The goddess manipulated the world that he was going to and changed all the heroines into these twisted beings that fit her character. They were all now harboring this unhealthy obsession toward him and trying with all their powers to take him away for themselves.