Eccles Zaphardt, a gnemlin near the entrance of Maldura, told me that the Alcove of Reason and the Waterworks sections of the city have been locked down due to immolated invasion! In order to explore a possible connection between the threat within the city and the Primordial Malice, I must face them, myself! I should be able to access the Algorithm For Destruction through a door within the Sublevel Access Antechamber.
Use the Sentry Shock Box XII on 8 disabled undertok sentries -- (inconsistent group update; check each character to confirm). If you get garbled speech from the sentries, speak with the Voice Box again.