Bifrons

A demon of monstrous guise who, according to Johan Weyer, often took the form of a man well versed in astrology and planetary influences. He excels in geometry, is acquainted with the virtues of herbs, precious stones, and plants, and, it is said, he is able to transport corpses from one place to another. He also lights the strange corpse lights above the tombs of the dead. Twenty-six of the infernal regions obey his commands.