Upper Blackrock Spire is the raid instance in Blackrock Spire. There is a 10 player cap here but the lower part, LBRS, is balanced and designed for a 5 man group.
Before the release of Patch 3.0.8, a raid here required completion of the quest Seal of Ascension. However, this is no longer required since the door to Upper Blackrock Spire (UBRS) is now permanently open.
To enter the Upper Spire, use the same raid entrance as the Lower Spire and follow the left wall as you enter. You will ascend a small flight of stairs and into a hall with smaller side chambers. Each chamber is filled with mobs and a small glowing rune. Defeating the mobs in a chamber will deactivate a rune and once each has faded, a double door at the back of the hall will open.
|Chamber of Battle
|Hall of Binding
|Hall of Blackhand