The reincarnation of demon king

The Reincarnation of the Demon King Nine thousand years ago, the universe trembled. The Demon King stood on the brink of ultimate victory, his shadow looming over the four continents of Ilbaf, Hubit, Elf, and Argun. The Gods were defeated, and the cosmic order was about to be rewritten in darkness. But at the final moment, the ultimate betrayal occurred: Lucifer, the King’s most trusted disciple and chosen successor, drove a blade through his master's heart. The Demon King fell, his power shattered and his soul cast into the void of time. Now, in the Kingdom of Argun... Volt Laywin is the laughingstock of the Royal Academy. Skinny, weak, and born into a simple rural family, he is mockingly called "The Stupid Boy" by his peers. In a world where Mana is everything, Volt is a Zero—a failure with no strength and no future. But destiny has a cruel sense of irony. After a humiliating defeat at the academy, an ancient seal breaks within Volt's soul. The memories of a fallen sovereign return, and the crimson eyes of the Demon King awaken in the body of the weakest student. Volt Laywin is no longer just a boy. He is a king who has returned to reclaim his throne, to punish the traitor Lucifer, and to show the four realms that even a "Magicless" body can hold the power to destroy the universe. The cycle of vengeance begins now.