Idea is that a man dies, his body has no magic power within meaning he is a regular human. They are rare in this world, but not unknown. He is killed right at the beginning, and is brought back due to a necromancer trying to turn himself into a lich. That fails, and the body they experimented on awakens as something new. The MC starts over powered, and has no idea what or who he is. He needs to learn that. He needs to learn about the magic he has control over now. He does know somethings that his past self knew, such as monsters names and weaknesses, he knows magic, and basic tactics like kill mages first. It is his journey to learn what his place is, and to find the other 4 like him.