The Black Nexus was a Stormkeep of the Anvils of Heldenhammer found within the Free City of Anvilgard.
The Black Nexus was not only a fortress, but also a strategic hub of immense importance. Four different Realmgates were hidden inside the Black Nexus' walls, allowing the Anvils of the Heldenhammer to swiftly relocate their forces across the Realms.
The Black Nexus stood at the very heart of the city of Anvilgard. It towered over every other building in the city, its dark walls were built from black volcanic rock that could be found along the Charrwind Coast. Gaining entry into the fortress was an almost impossible task, as only Stormcast Eternals were permitted entry.