• Chestguard of Hidden Purpose
• Item Level 128Disenchants into:
  [Void Crystal]: 1-2
• Binds when picked up
  
• Plate
• Chest
• 1607 Armor
• +33 Stamina
  +31 Intellect
• Red Socket
  Blue Socket
  Yellow Socket
• Socket Bonus: 2 Mana per 5 sec.
• Durability 165 / 165
• Requires Level 70
• Equip: Increases spell power by 46.
  Equip: Restores 15 mana per 5 sec.
• 
• Sell Price: 9 44 75

Source

Chestguard of Hidden Purpose drops from Akil'Zon in Zul'Aman.

Patches and hotfixes

Patch 2.3.0 (13-Nov-2007): Added 

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB