Blackout Citadel

Aurum's Citadel & City are a previously seen structure in Bleach: Hollow Fragments in hueco mundo. Though there is some alteration in this iteration. For example, the citadel now looms over an actual populated location. These including Aurum's 'friends'/allies as well as her children roaming freely.

The city itself is complacent of the arrangement, as Aurum provides them with surplus resources and protects them by default, as they are part of her citadel's foundation structure. However, the norms of this town are quite twisted. Given the nature of Aurum, it's no surprise that these townsfolk revere her as a deity and will give her themselves as offerings to her, since she needs to eat human flesh to maintain herself.

Special areas of this citadel are very visible ones. These include: A sacrificial altar that is visible outside of the citadel. Defence towers that are made from vanadium that has undergone a mystical change to be at a hardness scale of diamond or greater.

Surprisingly, the actual town, doesn't have it's own individual force field or dome to protect from aerial attacks. Only the entirety of the Citadel and Blackout City, have a shared shielding. Notably, the island that the city and citadel are on is ominously large, suggesting large scale underground expansions.