The 100th Regression of the Max-Level Player - Chapter 243: The Variable (1)

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

Synopsis is in the beginning first chapter, so you can try to read it first.Zhang Fei is an ordinary human, but he is also an Incubus, and he also a Heavenly Fox.

Lan Hengsheng was once the pride of the Lan Clan, a child prodigy with limitless potential—until his fifth birthday changed everything.Declared spirit coreless, he was abandoned by those who once praised him, dismissed as a mortal in a world ruled by cultivators. His so-called friends turned their backs on him, and the clan that once held him in high regard saw him as nothing more than a disappointment.But Hengsheng holds a secret—one that defies the natural laws of this world.Ding![Make a wish] He wished for everything! With the ability to create a system, he doesn’t need talent. He doesn’t need fate’s blessing. He can program his own path to immortality.Why struggle for enlightenment when he can create a Cultivation Optimization System?Why waste decades training when he can install a Time Acceleration System?Why risk his life searching for treasures when he can develop an Auto-Farming System?While other cultivators beg the heavens for guidance, Hengsheng writes his own cultivation manual.Armed with his cheat-like power, he will challenge geniuses, reshape sects, and rewrite the very foundation of cultivation itself.The strongest cultivator is a system maker!

Transmigrating into a mystical and eerie world, Fan Wu gains a special ability: a system to allocate attribute points! By slaying demons and monsters, he earns points to enhance his own attributes!From then on, a peculiarly muscular Taoist priest appears in this supernatural world.Facing trembling demons and monsters, Fan Wu reveals a ferocious grin.“Your purity is too low!”“System, enhance my stats!”