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 (heroic)
 * Earthen Battleplate (heroic)
 * Earthen Chestguard (heroic)
 * Hauberk of the Raging Elements (heroic)
 * Lightning-Charged Tunic (heroic)
 * Tunic of the Raging Elements (heroic)

Source
This item drops from Halfus Wyrmbreaker, Valiona and Theralion, and the Ascendant Council in the Bastion of Twilight on Heroic mode.

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