Exos, Herald of Domination

Exos, Herald of Domination is a rare elite maw caster located at the Altar of Domination in the Maw. Domination's Calling is needed in order to create the portal to its area, which itself requires defeating the other three four-player rares: Apholeias, Herald of Loss in the Crucible of the Damned, Ekphoras, Herald of Grief in Gorgoa: River of Souls, and Talaporas, Herald of Pain in the Tremaculum.

Exos drops the Vorpal Amulet, and has a chance at dropping Korrath's Grimoire: Aleketh, Korrath's Grimoire: Gyadrek, and Korrath's Grimoire: Belidir. In patch 9.1, Exos will drop Nilganihmaht's Signet Ring, one of five required to acquire the Nilganihmaht Control Ring in The Rift.

Criteria of

 * Better to Be Lucky Than Dead
 * Deadly Serious