Leggings of the Fiery Conqueror

Leggings 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 Greaves
 * Immolation Legguards
 * Immolation Legplates
 * Leggings of the Cleansing Flame
 * Legwraps of the Cleansing Flame
 * Balespider's Leggings

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