Medallion of Mystifying Vapors

• Medallion of Mystifying Vapors
• Item Level 39Disenchants into:
  Not disenchantable
• Binds when picked up
• Unique-Equipped: Brutal Insignia of the Dominance Offensive (1)
• Trinket
• +6 Versatility
• Use: Increases your mastery by 150 for 15 sec. (1 Min Cooldown)
• Horde Only
• Requires Level 35
• Sell Price: 25 39 83

Source

This item is sold by  Tuskripper Grukna <Dominance Offensive Quartermaster> at Domination Point in Krasarang Wilds for 414 58.

Patch changes

• Patch 6.0.2 (2014-10-14): Cost converted to gold.
  
• Patch 5.1.0 (2012-11-27): Added.
  

External links

• Wowhead
• WoWDB