Dwarven city built within the great wall itself, rather than on either side like some typical city, made as the front line to guard the Transient Forest against perturbing entities existing within. The wall's made out of combination of cold steel and mythral, the only metals seeming to affect much of the creatures residing inside the forest. Much to the dismay of Dwarfs, much of their siege weaponry seem ineffective causing Dwarves both a major sense of panic & rage but also putting forth a new division of study. This Dwarven city exists almost entirely to foray into the wilds, exploring and recording all information to try driving back the rapid growth seeming to threaten expansion past the waters and mountains.
Features;
The features of the wall have some constant ionizing barriers powered by Spark Phraxcrystal. These barriers constantly filter out an destroy the strange seedlings floating by coming from the forest every month or so. The Dwarves of Dal'Tadyr have trebuchets an flamethrowers to keep trees trimmed close by so they cannot spread. If they grow taller an over the wall, the wall will succumb to the forests' influence; that is why the forest must stay trimmer, and the wall stand so tall.
Peppered throughout the wall facing toward the Transient Forest, there are installations of new types of defenses - different shock fields, various bombing pads as it still appears that black powder can be quite conducive to scattering pests trying to scamper along the walls. On top there are trebuchets to launch various 'dispersal packages' to ensure the trees do not grow too tall.