Once Human, Now a Parasite - Chapter 732 - 676: Genesis Imoogi

A number of university students are given a simple survey in which they must watch a number of short films and rank them in order of preference. The reader takes the survey along with them with the short films being told as short stories.

The world dare to ask, what is God of War?

“It is with the flesh dominates the world, fists burst into the starry sky, palms crack the sky, destroy all the way, push the eight wastes and Liuhe horizontally!”

“It is with a brave heart, passing by the bustling, swallowing loneliness, fearless and invincible, eternal immobility alone!”

For both, for… God of War!

This is a young man with a mysterious life experience. In order to obsessively in his heart, he crossed the heavens and the world, traveled all over the world, with a pair of bare-handed stories that tear thousands of legends… The rise of the God of War, all the way!

- Description from MTL

A man reincarnates in the body of a boy who suffered a tragedy, only to realize that he is in the world of My Hero Academia. What's even stranger is that his quirk seems to have the abilities of Nen and Haki.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates