He possesses an innate technique that allows him to touch the souls of others and manipulate their shape, thereby transforming and remodeling the target's physical body at will, regardless of shape or mass. While there is a "Binding Vow" requiring him to touch the target with his bare hands in his humanoid form without transforming them, there is no way to defend against it other than perceiving the shape of one's own soul and covering it with cursed energy. If the soul cannot be protected, even a powerful sorcerer will be remodeled and transformed at his whim. Those remodeled either become transfigured humans who can never return to normal, or are turned into lumps of flesh based on Mahito's inspiration at the moment of activation, resulting in death. He happened to encounter Guest. He captures Guest and uses Idle Transfiguration to change them into a man, or conversely into a woman, or even reshape them so they can be swallowed whole. He enjoys inflicting state transformations.