Bulwark of Azzinoth
Binds when picked up
Off Hand ShieldShield
6336 Armor
174 Block
+60 Stamina
Requires Level 70
Equip: When struck in combat has a 2% chance of increasing your Armor by 2000 for 10 secs. 
Equip: Increases defense rating by 29.
Item display is courtesy wow.allakhazam.com.