Desecrated Tunic

Desecrated Tunic 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:
 * Redemption Tunic
 * Cryptstalker Tunic
 * Earthshatter Tunic
 * Dreamwalker Tunic

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