• Pantaloons of Arcane Annihilation
• Item Level 128Disenchants into:
  [Void Crystal]: 1-2
• Binds when picked up
  
• Cloth
• Legs
• 188 Armor
• +35 Intellect
  +34 Stamina
• Durability 75 / 75
• Requires Level 70
• Equip: Improves haste rating by 45.
  Equip: Increases spell power by 54.
• 
• Vendor 75

Source

This item can be purchased for 75 from G'eras in Shattrath City.

External links

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