the dark fortress was Cynder's old fortress during the dragon civil war when she was possessed by malfor. her fortress was besieged by an opposing faction who was able to reach her fortress and defeat her in battle, forcing her to flee in to the dark portal, where she is again defeated in battle in the alternate dimension, which causes the realm to collapse, the victorious warrior saves her just as the portal to that dimension closes. she is later imprisoned for three years ( see "imprisonment") she is later saved a few years before malfor besieges Warfang. The Fortress is now almost entirely built around by the city of Cynthia, which has incorporated the old fortress walls into that of the city. It is later speculated that a Precursor entry Pylon lie below the main tower's foundations.