The Regressor Can Make Them All

As the legendary master blacksmith of humanity's final resistance squad, Lee Se-hoon forged the weapons that fought demons to the bitter end. Yet, the war concluded in mutual annihilation, leaving the world a desolate ruin. Unable to bear the futile silence, he takes his own life, only to wake up years in the past as a young cadet at Babel, the world's premier hero-training academy. Granted a miraculous second chance, Se-hoon vows to change the future by doing what he does best: crafting. This time, he will stop at nothing, resolving to forge absolute victory by using anything and anyone, as raw crafting material.