The Mechanar is the first wing of the Tempest Keep instance. It serves as a base for Pathaleon the Calculator and also generates manacells, which contain an incredible amount of power. It once belonged to the Naaru. The area is filled with Mo'args as well as Bloodwarder and Sunseeker blood elves.
This is the purple crystal building south of the main palace. At level 80, the instance is easily soloable on normal mode, while heroic mode is a challenge and requires high-level gear for most classes. At level 85, the instance becomes an easy gold run even in heroic mode.