Toaru Majutsu no Index - Volume 8, Chapter 2: Girls facing off. Space_and_Point.

A once supreme celestial being is reborn in the world of mortals!With the ability to decide life and death in his left hand through his remarkable medical skills,And overwhelming supernatural powers in his right hand to crush everything!Unrivaled in both medicine and martial arts, he roams freely with arrogance!

Beneath the neon-lit bustling city, unknown monsters lurk.Martial arts sects, biological modifications, cutting-edge mechas, golden bloodlines, abyssal alien species...Chen Feng arrives in this world, similar to Earth, and discovers he can enter a strange dream world where he can pick up various light groups.【Limit-Break Light Group: Can enhance martial arts skills, break limits, and upgrade!】【Attribute Light Group: Can randomly increase four-dimensional attribute points, bigger and stronger, add points!】【Talent Light Group: You gain the talent - Cyan Armor, able to switch combat forms, with power increase by 100%........】【Skill Light Group: You obtain the Extreme Refinement Method, destined to break human limits......】As martial arts gradually decline, and modified humans and cutting-edge mechas flourish,Chen Feng has achieved ultimate limit-breaking in the dream world, integrating extraordinary talents, and continues the path of martial arts!Tear apart mechas with his hands, smash aircraft carriers with his fists!I am the great King of the Century..........My name is Chen Feng, the peak you can never surpass.

Back to the end of Ming Dynasty, he was reduced to a slave.

This emperor, a beggar can do it, a slave can do it, a bandit can do it, but a house slave can’t do it?

- Description from novelbuddy

In a world where magic and divine power collide, the youngest son of Lucifer, a demon boy born with unimaginable strength, was chained and sealed away by his father to prevent him from destroying Hell itself. At the age of eight, his power became so uncontrollable that even the King of Hell feared his existence. Desperate to keep the demon's destructive potential contained, Lucifer made a pact with the great Merlin, who trapped the boy in the human realm, binding his powers with enchanted chains.Years later, with Merlin dead and a kingdom still fearful of the demon’s release, an elite group of knights, blessed by the gods, take it upon themselves to guard his prison. However, when a war between the mages and knights erupts, chaos provides the perfect opportunity for the young demon to break free.Hidden among the knights, disguised within their ranks, the demon plots his next move. But his escape is just the beginning. Hunted by both the mages and the knights, he must navigate a world where ancient gods, wizards, and warriors clash. As he travels deep into enemy territory, sneaking into the heart of the kingdom, he is driven by one purpose: freedom.Now, with his powers still sealed but his physical strength unmatched, the young demon embarks on a journey that will shake the foundation of both realms. Can the knights stop him before he regains his full strength, or will the demon's wrath bring both Heaven and Hell to their knees?As the demon hides in the shadows of the human world, a new chapter in the war between gods, magic, and demonic power begins.