The God-Slaying Demon King: Reincarnated as a Mere Mortal to Become the Strongest in History! summary: Despite being the all-powerful Demon King and considered the strongest in history, Hyram rebelled against the demands of the Demon God for sacrifices and lost his life in combat. Legend had it that he was unbeatable under the Demon God's rule and no spell could defy basic logic. However, after half a millennium, Hyram was reborn as a young human male, despite humans being widely regarded as the weakest of all races. Hyram recognized their immense potential and their ability to challenge even the Demon God. He embarked on a new quest to defeat the Demon God once and for all, and to reunite with his long-lost adopted daughter, Fillfee.