Forget the End of the World·sword

A blind man, wearing a black robe, a black sword, a black cloak and a black wooden box. Is this all he has? No, there is also a pair of eyes that are redder than the blazing fire. Who is he? No one knows. There are rumors in the world that he is a murderous demon. No one knows his true identity because everyone who has seen him has died under his sword. Maybe he himself has forgotten who he is and why he came to this world, just for that box, right! It was the old-looking black wooden box he was carrying.