Tower of Mobs

Different Towers appeared all over the earth, bringing with them the possibility of using magic under a strict system that allows people to use magic and enter the tower. Human civilization had a technological disruption caused by the waves of monsters that invaded the earth through the towers and as well as by the interference of the mana spirits that were curious about the electronic devices, the technology backed up big steps since they failed to prevent mana spirits from playing with the electricity within devices, causing humanity to explore the uses of magic and adapt them for their uses, thus making it an obligation that people could use magic to enjoy ancient luxuries that were common before.