Chromatic Carapace

Chromatic Carapace is a very rare drop from Upper Blackrock Spire and was used to craft some epic items.

Source
Chromatic Carapace drops from Gyth, the dragon mount of Rend Blackhand in Upper Blackrock Spire.

As an objective

 * Legplates of the Chromatic Defier (quest) for Legguards of the Chromatic Defier or Legplates of the Chromatic Defier
 * Breastplate of the Chromatic Flight (quest) for Breastplate of the Chromatic Flight