Dark Middle Ages? I'm the MC Electricity Boss

Chen Yun took the MC system and traveled to the Dark Middle Ages with extraordinary power, and decided to bring some changes to the world. This world has a cube sky city connected to the world by waterways. Everyone is equal there, with endless milk, endless food, and powerful iron puppets. There was no suffering, no nobles, and no gods, just a man holding a cube. Sharecroppers, serfs, workers, and prostitutes rejoiced when they saw him, because they knew their suffering was over. The knights were in despair when they met him, because they knew that the man was invincible as long as he ate and fought at the same time. When wizards met him, they were impressed by his wild ideas and driven crazy by his electro-generated machines and rules that did not conform to reality. When the nobles met him, they saw serfs, tenant farmers, prostitutes, workers, and merchants behind them. All the people were there, but there was no place for them. They knew that the era of the nobility had ended, and that the new era had no ship to carry them. When the gods saw him, they knew that the era of divine rule had ended and the era of human rule had arrived. The demons and evil creatures saw... Oh no, the demons and evil creatures couldn't see him. They could only stay in various electric machines. They shouted in fear: "Could this evil thing be made by magic?" And he just smiled and said: "I call it efficiency."