The Mana-Tombs are located in Auchindoun. It is the north instance entrance.

How do I get to Mana-Tombs?

The Mana-Tombs are a wing of the Auchindoun instance. It is accessed north from the Ring of Observance. Note that although the instance itself is called Mana-Tombs, the entrance area outside the portal is called Mana Tombs without the dash. The instance normally takes about 90–120 minutes.

What reputation is Mana-Tombs?

A complete clear of Mana-Tombs will give about 1200 reputation with the Consortium until Honored, and 2400 each Heroic clear.