• Darkcore Leggings
• Item Level 226Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when equipped
  
• Mail
• Legs
• 1150 Armor
• +106 Agility
  +88 Stamina
  +59 Intellect
• Blue Socket
  Yellow Socket
• Socket Bonus: +12 Attack Power
• Durability 105 / 105
• Requires Level 80
• Equip: Improves hit rating by 52.
  Equip: Improves haste rating by 75.
  Equip: Increases attack power by 120.
• 
• Sell Price: 13 7 50

Source

This item drops from General Vezax in the 25-man version of Ulduar.

Patch changes

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

External links

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