• Guiding Star
• Item Level 232Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Mace
• Main Hand
  
• Speed 1.80
• 88 - 283 Damage
• (103.3 damage per second)
• +36 Stamina
  +48 Intellect
• Durability 105 / 105
• Requires Level 80
• Equip: Improves haste rating by 49.
  Equip: Restores 15 mana per 5 sec.
  Equip: Increases spell power by 550.
• 
• Sell Price: 21 91 33

Source

This item drops from Razorscale 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