• Cloak of Blade Turning
• Item Level 110Disenchants into:
  [Void Crystal]: 1-2
• Binds when picked up
• Back
• 387 Armor
• +31 Stamina
• Requires Level 70
• Equip: Improves your resilience rating by 22.
• 
• Sell Price: 3 22 38

Source

This item drops from Kael'thas Sunstrider in Magisters' Terrace on Normal mode.

Patches and hotfixes

Patch 2.4.0 (25-Mar-2008): Added 

External links

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