Breastplate of the Wayward Vanquisher

Breastplate of the Wayward Vanquisher is a tier 8 armor token. It can be exchanged in Dalaran for the following items:

Source
This item can be found inside the Cache of Winter after defeating Hodir in the 25-man version of Ulduar. It can also be purchased from Arcanist Firael or Magister Sarien for.