• Circle of Ossus
• Item Level 264Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
  
• Cloth
• Waist
• 199 Armor
• +92 Stamina
  +92 Intellect
  +72 Spirit
• Blue Socket
• Socket Bonus: +5 Spell Power
• Durability 35 / 35
• Requires Level 80
• Equip: Increases spell power by 132.
  Equip: Improves haste rating by 80.
• 
• Sell Price: 4 98 14

Source

This item is sold by the following vendors for 60 :

•  Arcanist Uovril <Emblem of Frost Quartermaster> in Dalaran
•  Goodman the "Closer" <Emblem of Frost Quartermaster> in Icecrown Citadel
•  Magister Arlan <Emblem of Frost Quartermaster> in Dalaran
•  Paldesse <Cloth Armor Merchant> in Dalaran

Trivia

The Real-Time Strategy Game Age of Empires III also had a Circle of Ossus. In this game, the Circle of Ossus was an evil organization seeking the Fountain of Youth.

This item could also be a reference to Ossus, a planet in the Star Wars universe where the Jedi kept the sum of their knowledge.

Patch changes

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

External links

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