• Mantle of the Preserver
• Item Level 219Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Cloth
• Shoulder
• 233 Armor
• +72 Stamina
  +56 Intellect
  +46 Spirit
• Durability 60 / 60
• Requires Level 80
• Equip: Improves critical strike rating by 57.
  Equip: Increases spell power by 91.
• Sell Price: 6 55 77

Source

This item drops from Auriaya in the 10-man version of Ulduar.

Patch changes

• Patch 3.1.0 (14-Apr-2009): Added. 
  

External links

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