Eye of Adaegus

Source
This item drops from:
 * Onyxia in Onyxia's Lair
 * Colossus of Regal in Silithus
 * Ragnaros in Molten Core
 * Qiraji Lieutenant General in Silithus
 * Azuregos in Azshara
 * Emeriss in Ashenvale
 * Colossus of Zora in Silithus
 * Nefarian in Blackwing Lair
 * Highlord Kruul in Silithus
 * Lethon in Ashenvale
 * Lord Kazzak in Blasted Lands
 * Colossus of Ashi in Silithus
 * Taerar in Ashenvale
 * Ysondre in Ashenvale