The mage uses itself as a medium to mobilize elements to cast spells, so as a mage, there are two necessary conditions: magic and mental power. Magic will affect the mage's upper limit, while mental power determines whether it can control magic. Most people are not qualified to control magic. Many people lack one of the two conditions. A few lucky people have both. Everyone can test their own talents at the age of eight. There was no such good thing in the old era, so many people who were originally buried were discovered. Even so in the magic empire, where the population reached one billion, the mage did not exceed one million, and the probability of one in a thousand was unimaginable in the past.