|Built||4 Lunar 9114 GE|
In the Tha'lith Conflict, demons alongside thousands of Tragaran slaves built this imposing fortress. Graz'zt ordered Gu'sax 12, or Fort 12, built to hold territory between the northeast section of Mughakh-Gol the craggy promontory where this bastion sits. It had dozens of entrances, but the main gates were at the head of defile running west and descending into the Gurutharni wetlands. In the Great Betrayal, the Krotoan army was about to attack this place, forming up in lines to go through Grazaghast, better known then as the Suicide Defile. Lukoon, recent escapee of Barhaz Halarax, arrived in time to halt the maneuver, saving them from what would have been a massacre by the demon archers of Mo'tzor. The demons were so enraged at the feint, that some left the security of their great hold and flew after the Krotoan where they were easily put down.
In the Tilnangau-Varelay War, this place was captured by Varelay. It was renamed Mo'tzor in honor of Aperoq's most trusted chronicler (one who died for being a bit too truthful, instead of heaping glory on the shoulders of his master).
In the Varelay Upheaval (2608 LE - 16 HE), the water table shifted giving birth to lake Styming, submerging the defile and the lower levels of the fortress. It made the place an island fortress with submerged parts; an ideal place for the swamp's Vedrii and yuan-ti.