Violent Swordsman

A swordsman who was called from another world. He wields a magical sword with a swiftness too fast for the eye to catch, kicking up a great wind in the process. He sold his soul to demons to attain the pinnacle of strength, and now he wanders the world in search of powerful opponents to fight in battle. He will appear in front of those with power the moment he senses one near by, but he shows no interest to those much weaker than himself.