Belial as an evil spirit appears in a number of sources, from the Bible and Jewish apocryphal literature to modern Satanism. He is believed to be the prince of darkness, the devil, the father of idolatry, the demon of impurity, the angel of lawlessness, and the ruler of the world. In this grimoire, written by two experienced magicians and authors, Asenath Mason and Edgar Kerval, this demon king is presented as the Guardian of the Abyss and a being of multiple faces. You will find here an introduction to his mythology, as well as evocative rituals that will help you explore his gnosis in your personal practice.