• Relentless Gladiator's Cloak of Victory
• Item Level 245Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
• Unique
• Back
• 166 Armor
• +114 Stamina
• Requires Level 80
• Requires personal and team arena rating of 1750
• Equip: Improves hit rating by 50.
  Equip: Improves your resilience rating by 50.
  Equip: Increases attack power by 151.
• 

Source

This item drops from Koralon the Flame Watcher in the 25-man version and Toravon the Ice Watcher in the 10-man version of Vault of Archavon.

This item is also sold by the following vendors for 26,100 :

•  Captain Dirgehammer <Apprentice Armor Quartermaster> in Stormwind City
•  Sergeant Thunderhorn <Apprentice Armor Quartermaster> in Orgrimmar

Patch changes

• Patch 3.2.0 (04-Aug-2009): Added. 
  

External links

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