• Loatheb's Shadow
• Item Level 200Disenchants into:
  [Abyss Crystal]: 1
• Binds when picked up
• Unique
• Trinket
• Requires Level 80
• Equip: Improves critical strike rating by 84.
  Use: Increases attack power by 670 for 20 sec.
• Sell Price: 9 11 60
• Cooldown: 2 Min

Source

This item drops from Loatheb and Gluth in the 10-man version of Naxxramas.

Effective Attack Power

If used every cooldown, this item provides:

670 * 20 / 120 = 670 * 1/6 = 670 / 6 = 111+2⁄3 AP

External links

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