Bury Those Cockroaches!

North, south, east and west. Those are the locations that you should be concerned about. Surrounding this fortress, within Mightstone Quarry, are four perfectly situated Nerub'ar sinkholes.$B$B<Holgoth hands you a bundle.>$B$BBe very careful with that package, $N. Mishandle it and you'll be dog meat.$B$BInside the bundle are seaforium depth charges. Get to each of those Nerub'ar sinkholes and plant a depth charge at their center point. If all goes well, the tunnels will collapse.$B$BGet a move on!