Omniscient Reader’s Viewpoint (Web Novel KR) - Chapter 42

Waking up in the body of a 6-year-old boy a few years before Cintra is destroyed, Madara receives a system that gives him the ability to gain the powers of Uchiha Madara.[The peak of Uchiha Madara's system is before he becomes the ten-tails jinchuuriki.]The system's percentage does not stop Madara's power, but rather the system's release. After all, I don't want to see a character who goes around killing everyone from the beginning of the story.

In the aftermath of apocalyptic event, a man rises above the others to lead an era.

With threat beyond the stars, as Supreme Beings of otherworldly star system watches over as Destiny and Fate work their way, an era of Gods descended upon Earth

And in his rise, lies a terrifying secret. Read how he rises above it all, through all the complicated love life, his determination to push through his own fate and destiny and the Will that pushes him forward.

With all of this, could the Fate that was written be overturned? And will he truly rise to the top and survive?

A great battle for the fate of the Universe began.

This is the story of Lord Shadow.

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

Enemies to Lovers? You are at the right place!Liam Von Sylvyran: He is the third prince of the kingdom of Solaryn. He is also the youngest of all siblings. Though he is blessed with magic power, he cannot control this magic power. He has always been humiliated for this flaw and has always been compared with his older siblings. So he has a hunger to prove himself. He is the commander of the royal imperial army of Solaryn. He is one of the best fighters on the continent. It is also notable that he is incredibly intelligent, quick-witted, and has extraordinary beauty.Kian Eryx: He is the commander of Oblivara's imperial army. There is a quote that says that he is blessed by magic itself. He is one of the greatest magic wielders in the three realms. He is the definition of perfection. He has breathtakingly good looks, is incredibly smart, observant, and has extraordinary reflexes. He places top among the best fighters on the continent. There is nothing that he lacks aside from a heart.