Xanthor
Archmage of Erathia under 
Catherine. He is also the narrator in a few of the short stories that NWC employees had published on the now-defunct "The Nether Gods" fan site.
In Horn of the Abyss 
, he was captured and imprisoned by the barbarians and eventually rescued by 
Bidley. In gratitude for being saved, he told Bidley the location of Island of the Vengeful Serpent - the resting place of the 
Horn of the Abyss.