Desecrated Robe

Desecrated Robe is a tier 3 armor token. It can be exchanged along with various items at various NPCs at Light's Hope Chapel for the following items:
 * Robe of Faith
 * Frostfire Robe
 * Plagueheart Robe

Source
This item dropped from The Four Horsemen in the original version of Naxxramas.