The strongest mage

It has been said that fate is unstoppable, that destiny cannot be changed no matter how hard you fight it. It is arguable one of the laws that are impossible to change, however a long time ago, one person, Nero, the strongest adventurer on his planet managed to fight destiny, and after sacrificing himself to the cause and changing the destiny of his planet, humanity finally extended the peaceful times that it desperately needed. But now things are about to change.