The Great Demon King Is Reincarnated

In the magical world, there is an extremely dark and powerful magical empire! Their monarch, the Dark Magic Emperor, wants to rule the entire magical world! This powerful dark magic empire uses all kinds of bloody and cruel methods to conquer the magic world step by step! In this magical world, there are still many kingdoms and empires fighting to the death! Thus there is a world alliance of kingdoms to fight against the empire! In the end, the Empire was defeated by the Alliance Kingdom! The ruler of the empire was defeated by the Alliance Kingdom and his whereabouts are unknown! But in order to defeat the emperor, this incredibly powerful emperor, the Alliance Kingdom almost lost everything! Only the greatest sacrifice can defeat this imperial ruler! At this time, the defeated emperor whose whereabouts were unknown quietly entered the Alliance Kingdom map section! He's making a comeback. Our protagonist is the reincarnation journey of this emperor who is as powerful as the Great Demon King!