Breastplate of the Wayward Protector

Breastplate of the Wayward Protector is a tier 8 armor token. It can be exchanged in Dalaran for the following items:
 * Conqueror's Siegebreaker Battleplate
 * Conqueror's Siegebreaker Breastplate
 * Conqueror's Scourgestalker Tunic
 * Conqueror's Worldbreaker Chestguard
 * Conqueror's Worldbreaker Hauberk
 * Conqueror's Worldbreaker Tunic

Source
This item can be found inside the Cache of Winter after defeating Hodir in the 25-man version of Ulduar.

This item is also sold by the following vendors for :
 * in Dalaran
 * in Dalaran