Azmodeus

The former Archfiend of Control. His existence established a control over the other Archfiends to allow them to more effectively balance against the powers of the Aetherial Gods, known as the Azmodean Pact. He created the control system at the center of The Abyss to keep the World Engine intact. He was defeated by the Raiders of the Abyss and his body was used as a vessel for Zulex Vlaston.