Arifureta Shokugyou de Sekai Saikyou (WN) - Chapter 492

In his previous life, Lin Mu was the top assassin on Earth. He accidentally traversed to the Eternal Immortal Realm, where, over the span of eight hundred years, he cultivated from an ordinary mortal to the realm of an Immortal Emperor.However, as he was undergoing the tribulation to become an Immortal Emperor, his enemies ambushed him and his Divine Soul drifted through the cosmic Chaos for several hundred years. Now he possesses a body which belongs to another man also named Lin Mu, a live-in son-in-law of the Qin Family in River City who was constantly mocked and humiliated.“Rest assured,” Lin Mu mutters. “Since I have taken your body, I will naturally avenge you.”

Professor Kang lived the same day on repeat - same lectures, same coffee, same quiet evenings.Unremarkable in every way.That is, until the day he died trying to save a student.When he opened his eyes again, he wasn't in a hospital. He wasn't even human anymore.Reborn as the weakest of monsters - a slime - in a world where the strong devour the weak, survival is the only law that matters. But if clawing his way up means becoming the apex predator himself... well, so be it.

Qin Aofeng, a third-generation descendant of the great and prestigious Qin Family, was just as famous as his genius big brother Aotian, but was famed in Qin City for being the “Good-for-nothing Seventh Young Master.”

The compound is perilous, the clan is full of conflict. Before her rebirth, she dressed as a male, her birth a mystery. Because of her lack of talent, she was thought of as a worthless member of the clan. After her rebirth, she walked onto the path of a strong person, and lived on the continent like a fish in water.

Until one day at the capital city of the empire, the spear of the patriarch pointed to her young uncle that she always treasured, the “young male” that had always been undistinguished stood out, and astounded everyone, becoming a peerless genius. Ever since then, countless males and females became made for … …

The vast ancient forests, the deep bogs shrouded in back mist, the desolate and endless desert, the mountains and plains without any border where the magical beasts moved unhindered, this was a vast magical world.

- Description from Novelupdates

The main character has been reincarnated, and he possesses a system and a powerful treasure. Using these, he plans to create his own universe. Keep reading to find out more.