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.
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.