• Umbral Shiv
• Item Level 132Disenchants into:
  [Void Crystal]: 1-2
• Binds when picked up
  
• Dagger
• One-Hand
  
• Speed 1.80
• 137 - 207 Damage
• (95.6 damage per second)
• +12 Agility
  +30 Stamina
• Red Socket
  Yellow Socket
• Socket Bonus: +6 Attack Power
• Requires Level 70
• Equip: Improves hit rating by 13.
• 
• Sell Price: 13 43 75

Source

Umbral Shiv can be looted from the reward chest after successfully doing the timed events on Zul'Aman.

Patches and hotfixes

Patch 2.3.0 (13-Nov-2007): Added 

External links

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