• Mantle of Tattered Feathers
• Item Level 219Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Cloth
• Shoulder
• 233 Armor
• +64 Stamina
  +59 Intellect
  +53 Spirit
• Durability 60 / 60
• Requires Level 80
• Equip: Improves critical strike rating by 53.
  Equip: Increases spell power by 92.
• 
• Sell Price: 6 41 79

Source

This item is a random drop from trash mobs in normal Forge of Souls.

Patch changes

• Patch 3.3.0 (08-Dec-2009): Added. 
  

External links

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