• Empowered Deathbringer
• Item Level 232Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Axe
• One-Hand
  
• Speed 2.70
• 338 - 628 Damage
• (178.9 damage per second)
• Durability 105 / 105
• Requires Level 80
• Chance on hit: Sends a shadowy bolt at the enemy causing 1313 to 1687 Shadow damage.
• 
• Sell Price: 21 60 17

Source

This item drops from Onyxia in the 10-man version of Onyxia's Lair.

Patch changes

• Patch 3.2.2 (2009-09-22): Added. 
  

External links

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