I Am The Human Emperor

The blood nobles and their blood servant knights collect cruel blood taxes, the mad Lord of Flesh grows in all the bodies, the cunning elves mercilessly sell the slaves of various races, and the powerful wizards collect all the mortals they can see. Used for experiments that violate ethics.
The aliens unscrupulously oppressed the weak races, robbed each other of territory and weak mortals.
It wasn’t until they suddenly heard that a young mortal had built a gathering place of his own kind, and went together to ask for the wealth he deserved.
“After seeing that ridiculous mortal, we have to thank him for the meal he collected for us. By the way, do you know the most interesting thing?
“He dared to call himself emperor.”