The Regressor Makes Everything

After defeating the Six Demon Gods at last, the world was swallowed by the Sea of Death, Melhae— a world with nothing left but destruction. “If I’m going to die to the waves, I’ll end it with my own hands!” At the very moment Lee Sehun, humanity’s last blacksmith, takes his own life in despair— [Mind Skill ‘Return to Origin’ has been forged!] He opens his eyes… 31 years in the past, as a trainee at Babel, the hero training institution. Given a second chance, he refuses to let the future end in ruin again. This time, the regressor will forge everything himself.