Obsidian Sentinel

The Titans built the Stone keeper Obsidian Sentinel to help protect Uldaman from would-be invaders and to oversee daily operations while Ironaya and Archaedas slumber. Aoren Sunglow and Kand Sandseeker suspects that one of the Old Gods corrupted this keeper. Another keeper not yet corrupted is the Ancient Stone Keeper in the Temple Hall.

Tactics

 * Will periodically "splinter" during battle, summoning Obsidian Shards. These are level 40 non-elites. They can also reflect spells.
 * The Sentinel will lose attack power each time it splinters.
 * After about 4-5 Shards spawn, the Sentinel won't get any weaker. However, Shards will still periodically spawn. Kill them when they appear. At this point, they will hit harder than the Sentinel itself.

Loot

 * Obsidian Power Core (Quest Item)