An immensely powerful supernatural entity, Mephisto wields mystical energy for effects such as force blasts, matter manipulation, astral projection, interdimensional portals, illusion-casting and shape-shifting (his true form is unknown). Mephisto can capture the souls of recently deceased humans, though this usually applies only to beings who bargain away their souls to him. Mephisto can mystically trap living beings in his realm, but he cannot feed off these beings and rarely chooses to do this. A portion of his power seems to be tied to his realm and the number of souls trapped within it, meaning that prolonged absences from Hades weaken him. Mephisto does not need to eat, sleep or breathe, and is immune to aging and conventional disease.