Darker Places: Zeragith City

Hey again! I haven't posted in a little while, but don't assume that means I've been sitting on my hands. Here's my latest piece of conceptual location art, the Zeragith city, another part of my old Halfway House idea. Want more details? It's a long story, feels like it's from a lifetime ago. Just go to my older posts for Darker Places.
The Zeragith are a race of psionic bounty-hunters and mercenaries. It's believed they came from another dimension, one far more alien than anyone can comfortably grasp. It's believed that the city they erected in brass an obsidian was them trying to render their homeland in the crude materials at hand. It's believed that their city is situated so far from all other life because conscious thought is like white noise to the Zeragith, and that their tempers are short enough to silence that noise with little provocation. It's believed that gods walk the shadowey corridors of the city, long since bent in servitude against the powerful and alien minds of the city's inhabitants. It's believed the city is merely an outpost, a scout to a far greater invasion. The Zeragith are surrounded my speculation in the way a corpse is surrounded by flies. All that is known is that the Zeragith, when they can be coaxed from the depths of their whispering city, work as mercenaries and bounty hunters to the wicked and truly insane, for to deal with these creatures is to barter away your sanity.
Anyone foolhardy or desperate enough to cross the miles of jagged stone wilderness that separates the Zeragith from all other sentient life rarely ever report the journey to be a worthwhile one. Anyone directly confronted by one of these horrors will only remember a strong headache, words spoken too fast directly into their minds in a voice that sounds like grinding stone, and a floating silhouette of painted bone and oily ribbons of black flesh. The implacable creatures float aimlessly through the brass towers, conversing to one another in clouds of thought and alien sensations. Only those with true purpose even get close to the city, as the Zeragith have set up traps in the shadows of rocks and the angles of sunlight to distract and confuse intruders. Their remains can be found littering the stones on the path to the city and their unquiet and maddened spirits drift through the air like soot, begging for guidance and solace.
One this is certain: this place houses monsters.