Nether-stalker

Nether-stalkers are ethereal trackers. Most known nether-stalkers are members of the Consortium.

Items

 * Nether-Stalker's Blade
 * Gloves of the Nether-Stalker

Speculation
This title may refer to an ethereal rogue, since both in-game items are usable by rogues. The only other leather class that can wield daggers is the druid.