Black pillar headquaters

A massive towering building in the southwest corner of grey visan. 
This building is where their troops are trained, outfitted, fed and organised. A black pillar agent need not step outside this building for anything and due to the mysterious and magical way in which they move around, nobody is completely sure how many reside within.
A powerful Forbiddance magic surrounds the building, preventing teleportation within the building with the exception of the on duty rooms in which agents prepare for deployment. Why anyone would attempt to teleport within the headquarters via this room is unknown, but foolish attempts have previously been made and those responsible have been met with dire consequences.

Defences

Huge private army within. Heavily magic protection. Thick walls and defensively built structure.

Architecture

Externally red native sandstone, decorated with polished columns of black marble. 
Internally, each floor is separated into their various purpose including: barracks, training facilities, research labs and teleportation hubs.

Location under

Grey Visan

Owner/Ruler

Francis DeWitt