Era of Light: The Thousand-Year War

For a thousand years, Teranthos has been ravaged by an endless war against the demonic forces of Demon King Malachar. Kingdoms have crumbled to ash, millions have perished, and hope has faded into myth. In a remote village, a peasant boy named Kael grew up under the constant shadow of death. When demons claimed his father, Kael swore an impossible oath: to forge himself into a warrior capable of shielding the world from the encroaching darkness. But the battlefield was far more cruel than bardic tales. Mentors fell, comrades were slaughtered, and the blood-soaked war seemed endless. Yet, with every loss, Kael’s resolve hardened. Surviving the impossible, he rose from a nameless soldier in the mud to a highly feared commander. As the war reaches its boiling point, Kael must confront humanity's greatest nightmare. Can a mere peasant boy bear the weight of a dying world? — Description from novelcodex.org