MTL - I Have a System of Orcs - ~ Chapter 16

Leo died like an idiot and got a second chance in a world that doesn't tolerate idiots. Dropped onto forbidden Oni territory, he's forced into a death hunt where survival should be impossible, but his body adapts through violence, pain, and sheer refusal to stay dead.One brutal victory earns him gold, status, and the attention of Iori, a warrior prodigy who's never tasted defeat. Now, traveling a continent where strength is law and gods play with mortals like pieces on a board.Leo faces a simple question: how strong can you become when dying just makes you harder to kill?

A man who was once called the world strongest agent ended up becoming a teacher after his retirement to train the new generation of agents. After many years of training his disciples, he is killed at the age of 60 by the ploy of a secret organization and was reincarnated in another world with all his past memories.Though he was surprised by the magic and the strange species of that world, he adapted very fast to his condition as a newborn and took advantage of it. He acquired special magic and gained a massive amount of strength thanks to his tight discipline in order to reach his goal: resume his career as a teacher which he left halfway through in his previous life.This is the story of a man who based on the memories and the experiences of his previous life, became a teacher who travels through the world with his new students.

The Void Demon Realm invades, and Shu Feng awakens to become a Spiritualist, coming into contact with the true reality of the world.No one knows that he has a Mysterious Base within his body which could use Void Demon's power to enhance his body.

I was a failed experiment