I'm a Demonic Cultivator in the Real World

The demonic book opened...

“Seal a world's passage, besiege a lesser race, and carry out a massacre to exterminate them. Gain 2 points of demonic origin.”

“Three Great Sages of the demon race tried to seize a spirit treasure. Wound a demon sage and gain 4 points of demonic origin.”

“Encounter an ancient ferocious beast and suppress it with one palm. Gain 6 points of demonic origin.”

“Set up an origin formation and obliterate an undying king from another realm. Gain 8 points of demonic origin.”

…

After a serious illness, Chen Yuan found a demonic book in his mind. Looking at the words appearing on its pages, he had no idea how to respond.

“You swat a mosquito after closing the door, and it calls that a massacre?”

“You run into three monkeys stealing bananas at a tourist attraction, and they're Great Sages of the demon race?”

“That big duck is an ancient ferocious beast?”

“You trap a seven-year-old kid with a toy ring, and that's obliterating an undying king from another realm?”

…

“Wait, what do you mean I've become the wicked and unforgivable Demonic Emperor, the source of dark upheaval across the Myriad Worlds?”

This book is also known as A Guide to Demonic Cultivation, No One Understands Demonic Cultivators Better Than Me, I've Cultivated the Demonic Path, So Why Should I Care What You Think?, This Demonic Cultivator Is a Little Strange, and Greetings, Demon Ancestor.