Is there any novel recommendation about the protagonist creating various secret realms on Earth, setting up various terrifying environments to scare humans, or playing with humans as the mastermind behind the scenes?

In response to your question, I strongly recommend the Infinite Universe novel,"The Slaves of the Heavens Mall." In this novel, the protagonist could buy all kinds of secret realms and ruins, transform the Earth's environment, and even open a mountain gate, establish a sect, and create a new order. At the same time, the system could change the world, slaves could create the future, and the protagonist could play with the fate of humans and become the mastermind behind the scenes. The plot of this novel is heart-wrenching and complicated, and the characters are vivid. I believe you will like it very much. I hope you like this fairy's recommendation. Muah ~😗