The Rise of Meteor City

Meteor City is the worst place in the world to live in. It is where all the kingdoms in the world throw away their most vicious criminal, the noble throw away their unwanted child, the betrayed and the unwanted people gather, and most important thing, where the only law there is the jungle law. The strong eat the weak. Argo was just a little boy when all the kingdoms in the world reached an agreement that destroyed his hometown and created this hell hole that people don't want to be associated with. He saw the change from a beautiful place turned into a wasteland for unwanted people. Seeing all of this, he vowed deep inside his heart that he would do anything to bring Meteor City to the pinnacle of the world. And he did it! He managed to become the first-ever human that reaches level 5 alchemist, the grandmaster mage, and the general knight level strength. Not only he was the first one who became the pinnacle of those three most prestigious jobs in this world, but he also did that even before he turned 30 years old, making him the youngest to do that in the entire history. Now that everyone's eyes are on him, he is ready to start his plan for the rise of Meteor City. But when he was about to reveal his identity, he vanished without any trace. No one knows what happened to the biggest genius in the entire history. Some said he was assassinated, and others said he was in seclusion with his own harem. But fifty years later, he comes back to this world, ready to start his plan that got delayed for more than five decades. Cleaning up Meteor City. What would happen then?