If the capital (St. Aurelius) can be liberated, it likely would trigger a widespread revolt that the drow could not resist without aid from their Abyssal resources. But the drow cannot draw from their Abyssal resources – at least for a while. So St. Aurelius is a prime target for a counterstrike to free it from the yoke of the drow. A D&D 5th edition adventure for 1-8 10th level characters. The tenth episode in the Drow Conspiracy Epic.