• Binding of the Dragon Matriarch
• Item Level 219Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Cloth
• Waist
• 175 Armor
• +69 Stamina
  +46 Intellect
  +58 Spirit
• Durability 35 / 35
• Requires Level 80
• Equip: Improves critical strike rating by 57.
  Equip: Increases spell power by 91.
• 
• Sell Price: 4 35 51

Source

This item drops from Razorscale 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