RWBY: Otherworldly Swordsman

Kellan Alaric knew that his life was never going to be normal when he became the student of the most powerful swordsman in the entire world. Especially if that swordsman was one of the Seven Warlords of the Sea. It would take a whole damn lot to surprise him at this point. He had seen it all. From people whose size break logic, those who hold Devil Fruit powers, even to a man who could split the sea in half with a single slash. And finding himself in a new world entirely wasn't going to be enough to shake him.