• Cloak of Impulsiveness
• Item Level 103Disenchants into:
  [Large Prismatic Shard]: 1 (99.5%)
  [Void Crystal]: 1 (0.5%)
• Binds when picked up
• Back
• 70 Armor
• +18 Agility
  +19 Stamina
• Requires Level 66
• Equip: Increases attack power by 40.
• 
• Sell Price: 2 27 86

Source

This item drops from Lieutenant Drake in the Escape from Durnholde Keep in Caverns of Time.

External links

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