Count's Youngest Son is a Warlock - Chapter 18

800 years ago, 3000 dimensional gates opened across the entire world. In that moment, it was as if 3000 different colored eyes opened across the world as hordes of monsters swarmed out of these gates like tears.

Some could destroy city walls with one strike; They had bodies the size of a giant and fed on humans

Some latched onto humans, absorbing their bodies’ nutrients and enslaving humans

Some infiltrated the humans’ cities, disguising themselves as normal human beings while feeding upon human blood to sustain themselves.

In a night, the Human race fell to the bottom of the food chain.

The world had turned into a paradise for monsters…

Noda Sagiri is the only girl in her karate club, she has little feminine attributes but has a hidden talent in making sweets. On a whim she decided to bring her handmade cookies to her club, but after one of the idols of the school Michel François tasted her cookie he suddenly declared “I must meet with the girl who made these cookies!”. The search for the cookie maker began, however it seems that no one would come to expect that Sagiri is the one who made them….

A mysterious and strange world, a human civilization lacking power, and a horrible and turbulent world of human life, Luo Kai survived humblely as a prisoner. Pain and suffering honed his will. War and killing promoted his growth. He suddenly looked back. Is already one of the most powerful beings in this world.

- Description from novelbuddy

This novel is also known as Oh My God! Earthlings are Insane!

Fifty years ago, the Dragon City traversed, the iron-blooded lone army, held high the flag of earth civilization, and faced the terror terror of the outside world.

Fifty years later, Meng Chao was born again and found that he could become stronger by making contributions.

Meng Chao vowed that at the beginning, he simply wanted to make a small contribution to this society, but he didn’t expect that he would turn the earth into… punching monsters, stepping on demons, tearing ancient gods, suppressing the alien world, conquering the stars, this It’s too fierce!

- Description from Qidian