• Unblinking Eye
• Item Level 226Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
• Neck
• +46 Stamina
  +43 Intellect
  +41 Spirit
• Requires Level 80
• Equip: Improves critical strike rating by 49.
  Equip: Increases spell power by 74.
• Sell Price: 7 56 23

Source

This item drops from Assembly of Iron in the 25-man version of Ulduar.

Patch changes

•  Patch 3.1.0 (2009-04-14): Added.
  

External links

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