Ceiling: 30 feet high.
Illumination: The City of Brass is brightly lit day and night.
Wall of Elemental Stone: The barracks com- plex of the Ring of Fire has been surrounded by a cordon of elemental stone for protection. This rough stone wall is 60 feet high, 10 feet thick, and can be climbed with a DC 19 Athletics check. Any creature that comes into contact with the wall or starts its turn there is pummeled by the wall and subject to an attack: +33 vs. Reflex; 3d8 + 10 damage, and the target falls from the wall and is knocked prone. A creature that falls from the wall takes additional fall- ing damage as normal.
The heroes are free to fly over the wall, but they draw ranged attacks and will be pursued by the ground forces here. The total flying distance from one side of the wall to the other is 130 feet (26 squares).
Rubble These areas of loose scree are difficult terrain. A creature that runs, charges, or makes a double move through rubble must make a DC 20 Acrobatics check or fall prone.
Rubble Pile Fallen rock and debris are piled to a height of 10 feet. A rubble pile must be climbed with a DC 15 Athletics check. Remember, if you have a modifier of +14 or higher, you do NOT have to roll.
Elemental Vent Vents jetting pure elemental energy dot the area before the wall. Any creature that ends its turn adjacent to an elemental vent takes 3d6 + 6 cold, fire, and lightning damage. A creature that enters an elemental vent or starts its turn there takes 3d10 + 10 cold, fire, and lightning damage, and is stunned (save ends).  Each round on initiative count 0, roll a d10 for each elemental vent. On a roll of 10, the vent flares up unpredictably. Any creature adjacent to the vent takes 3d8 + 8 fire damage.
Building: Buildings adjacent to the area are of stone construction and from 30 to 50 feet high. Bashumgarda and his Ring of Fire guards do not retreat into the barracks complex, but the characters are welcome to. If they do, expand the tactical map with efreet-sized stone furnishings as appropriate.