'''Viscount Rex''' is a [[Dark Eldar]] [[Archon]]. Powerful and influential in [[Commorragh]], he was able to organize the [[Prophets of War]], a loose alliance of [[Kabal]]s, [[Wych Cult]]s, and even [[Necrons]] to plunder the [[Corvus Sub-Sector]] in the [[Crusade of Fire (War)|Crusade of Fire]].{{Fn|1}}