In Cassandra Clare's book universe ( The Mortal Instruments ), Asmodeus is a Greater Demon and the Prince of Hell, famously ruling over the realm of Edom. He is also featured as the powerful, manipulative father of the fan-favorite warlock character, Magnus Bane. Summary of the Infernal Hierarchy Goetic / Historical Description Great King of Hell Legions Commands 72 Legions of Spirits Astrological Sign Associated with the sign of Virgo / Scorpio Primary Domain Lust, Wrath, Hidden Knowledge, Mathematics Associated Element Conclusion