Chest of the Forlorn Protector

Chest of the Forlorn Protector is a tier 11 armor token. It can be exchanged at in Stormwind City or  in Orgrimmar for the following items:
 * Cuirass of the Raging Elements
 * Earthen Battleplate
 * Earthen Chestguard
 * Hauberk of the Raging Elements
 * Lightning-Charged Tunic
 * Tunic of the Raging Elements

Source
This item drops from Halfus Wyrmbreaker in the Bastion of Twilight on Heroic mode.

It can also be purchased from the following vendors for :
 * in Stormwind City
 * in Orgrimmar