Buné is a Great Duke of Hell, mighty and strong, who has thirty legions of demons under his command. He changes the place of the dead and makes them demons that are under his power to gather together upon those sepulchres. Buné makes men eloquent and wise, and gives true answers to their demands and also richness. He speaks with a comely high voice. Buné is depicted as a three-headed dragon, being his heads like those of a dog, a griffin, and a man (although according to some grimoires he has two heads like a dragon and the third like a man).