This zone feels like a goblin hideout, complete with lots of mud and debris everywhere, and improvised tools littering the debris, if that's possible. It feels like a goblin mining operation, which makes sense since the Citadel is completely underground.

Hallways are narrow, which makes visibility an issue when lots of players and monsters are around. Fortunately most hallway encounters are limited to only one or two mobs at a time. The large rooms however provide the breathing room needed for many of the multi-mob encounters.