"—" Zariel, Archduchess of Avernus, former angel of CelestiaOriginally, she was an angel of Celestia who was charged with watching the Blood War. Instead of just observing, she marshaled forces and charged into Hell. Zariel succumbed to the corrupting nature of the plane and fell from grace. Asmodeus then put her in charge of Avernus. She was first mentioned in the second edition book "Guide to Hell" (1999). Zariel was also mentioned in third edition in the "Manual of the Planes" (2001), and ' (2006). In 5th Edition, Zariel was given a stat block in "Mordenkainen's Tome of Foes" (2018). She is also featured heavily in the adventure module "" (2019).