Ikfirus the Vile

Ikfirus the Vile is a Forsaken that can be found in Light's Hammer of Icecrown Citadel. He sells the Tier 10 armor for rogues.

His name is also mentioned in the chest piece Ikfirus's Sack of Wonder.

Mark Gibbons's concept art for the Shadowblade's Battlegear refers to Ikfirus as the Geist Lord.

Quotes
Greetings, hero. I craft and sell Shadowblade armor for rogues.
 * Gossip