SP: Doors of Madness

These doors are in front of the steps of the Marble Palisade. The doors are built into the ground and are made entirely of heavy and thick obsidian and are 10x10feet. Typically, they are barred shut to avoid dwellers of the forsaken denizen to rejoin the surface unless during Banishment. When open, the old stone steps lead down into the darkness of the abandoned drow underworld of Tel Mirthriel.