Watchwall
This massive, magically engineered length of stone wall stretches from the fortress city of Glarondar to the slopes of Umbergoth. This extends the defensive barrier of the Dragonjaw Mountains another fifteen miles, up to a rock like fortification containing one-third of Aglarond’s armed forces.
The galeb duhrs—a race of earth elementals—built the wall during the reign of King Brindor, the first ruler of Aglarond. In exchange, the king pledged the aid of his people whenever the galeb duhrs might call for it. So far they have not, but if the Thayans ever turn their attention to this secretive people, the Simbul would be obliged to come to their rescue, no matter the potential cost.
The Watchwall is 30 feet high and 10 feet thick. It is seamless (Climb DC 25) and features no gates or windows. Wide stairs are carved into the Aglarond side of the wall every quarter-mile or so, and the guards atop the wall—known as the Watchers—carry rope to lower themselves down in case of emergency. They sometimes throw a rope down to visitors on the Thayan side, but only to those confirmed as friends of Aglarond.
Units of the Aglarondan army stationed at Glarondar patrol the length of the Watchwall at all times, staring out across the desolate Umber Marshes. Recently they’ve observed a number of shambling mounds staring back, but the creatures have taken no further step toward the wall, watching quietly even as the occasional lost unit of undead Thayan soldiers makes a mad attack. Thayan diplomats explain away these incidents as regrettable but understandable; the Red Wizards created thousands of such creatures, many of which went missing after the latest round of hostilities.
Guard barracks are set up on the Aglarondan side of the wall, one at each mile marker. When not on patrol, the Watchwall’s soldiers rest here, preparing for the call to arms they know must inevitably come. Whether it happens sooner or later is anyone’s guess.