Crown of the Forlorn Protector

Crown 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:
 * Earthen Faceguard (heroic)
 * Earthen Helmet (heroic)
 * Faceguard of the Raging Elements (heroic)
 * Headpiece of the Raging Elements (heroic)
 * Helmet of the Raging Elements (heroic)
 * Lightning-Charged Headguard (heroic)

Source
This item drops from Nefarian in Blackwing Descent on Heroic mode.

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