Chest of the Fiery Conqueror

Chest of the Fiery Conqueror is a tier 12 armor token. It can be exchanged at in Stormwind City or  in Orgrimmar for the following items:
 * Immolation Breastplate
 * Immolation Battleplate
 * Immolation Chestguard
 * Robes of the Cleansing Flame
 * Vestment of the Cleansing Flame
 * Balespider's Robes

Source
This item drops from Alysrazor in the Firelands on heroic mode.