MTL - I Wield a Sword at Hogwarts - Chapter 77

Fu Qingjun has transmigrated into a parallel world and discovered that his parallel self just committed suicide.With over 6,000 souls in his body, he feels his head throbbing. The next moment, he finds that his hair grows rapidly and that he could inject wisdom into a creature's brain through his hair.

In the morgue full of Uchiha corpses, he opened his eyes…

A mysterious voice rang in my ear…

He looked confused: “Saving the ninja world, what’s the matter with me, the remnants of Uchiha?”

- Description from novelbuddy

Leo was going to awaken as an Aura Farmer.All he wanted was to become the strongest. You know, normal kids stuff.Yet, being the strongest doesn't come easy. As he finds himself thrown into a forgotten era to solve mysteries, passing its trials to furthermore become stronger than any being that had ever existed.Still, the battle for power doesn't end there. Thrown into a battle for influence and power, Leo finds himself battling against other Aura Farmers both internal and external. It also just happens to turn out...everyone wants him either alive or dead, as long as it benefits them.Have you ever seen countless dragons paint the azure skies?Have you ever seen a whole continent reduced to dust by the flick of a finger?Aura is magnificent. Aura is absolute. But for Leo, an adoptee of the notorious Atlantis Clan, Aura is also a death sentence. Carrying a mysterious legacy and the weight of a slaughtered clan, Leo must navigate a world of madness, ancient mysteries, and a hierarchy of power that would rather see him helpless than awakened.From mysterious trials to the heights of the Bastard Volume, follow Leo as he dives deep into the harrowing mysteries of the Aura System and the dark truth of humanity’s past.

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.