|“All the tombs have been interconnected.”|
“To make one massive underground fortress.”
|— Kai and Cole|
The Serpentine's underground fortress (also known as the Serpentine's inner sanctum) is a massive subterranean fortress built beneath the Constrictai Tomb for the Serpentine to use during their hunt for the Fangblades.
- It is unknown if the fortress can go all over Europe, or just Mount Elbrus.
- Numerous tunnels connect the fortress to the other Serpentine Tombs, enabling the snakes to move around Mount Elbrus without being detected by their enemies.
Community content is available under CC-BY-SA unless otherwise noted.