Mephistopheles

Mephistopheles is a magical devil who was created from part of Asmodeus to serve as a lure for those seeking arcane knowledge, magical enchantments, or wish magic. He is seen as a floating male humanoid torso with an extended and exposed spine and no legs. He appears to mortals who offer him destruction of valuables in his name, a secret mark for a tattoo upon their body, and their soul to donate.

During times of great frustration with the arcane or reality is when Mephistopheles is said to appear and shine brightly on mortals. He tricks mortals by offering them magical ability in exchange for loss of their physical ability.