What are the Mana Tombs on World of Warcraft

The Mana-Tombs are a wing of the Auchindoun instance. It is accessed north from the Ring of Observance in Terokkar Forest. The bosses are Pandemonius, Tavarok, Nexus-Prince Shaffar, and on heroic mode Yor. Grinding Mana-Tombs is a nice way to gain reputation with the Consortium as each run will net you about 1200 (2400 heroic) reputation until honored.