Trouble at Auchindoun

I have spies within Auchindoun and they have been sending me disturbing reports. That place has been nothing but trouble ever since it exploded a couple of years ago.$B$BSomething in there has gone horribly wrong - again - and the Shadow Council is now on a war footing. Though the reports were lacking on details, their preparations appear to be directed inward.$B$BYou must make your way to the entrance of the Shadow Labyrinth. My field commander, Mahfuun, will fill you in on what needs to be done.