• Starlight Treads
• Item Level 226Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Cloth
• Feet
• 216 Armor
• +64 Stamina
  +65 Intellect
  +45 Spirit
• Blue Socket
  Yellow Socket
• Socket Bonus: +6 Spirit
• Durability 50 / 50
• Requires Level 80
• Equip: Improves critical strike rating by 57.
  Equip: Increases spell power by 94.
• 
• Sell Price: 6 56 26

Source

This item can be found inside Gift of the Observer after defeating Algalon the Observer 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