|They've activated the self-delete! Nah, I'm just messing with you. |
The Iron Sea was the region in which the Dwarves lived in three giant underground cities known as Dwarfholds.
[Paragraph on how the other Dwarfhold was lost]
In other planes
The Shadowfel equivalent of the Iron Sea is known as The Cauldron and is filled with incredibly powerful spirit shackles. Alyssa is constantly trying to seize it from Hastings, and it is said to be the only thing making him powerful enough to keep her and Lockhart from taking him out entirely.