Location from A Practical Guide to Evil by ErraticErrata
The Dead King's fortress — a near-impregnable citadel of undead that has withstood five crusades, surrounded by poisonous miasma and corpse-filled waters, where Neshamah has spent centuries perfecting the art of being unkillable.
Keter is the Kingdom of the Dead — Neshamah's domain, the fortress that has broken five crusades. Its defenses are the product of centuries of refinement: poisonous miasma that kills living soldiers, waters filled with corpses that rise when disturbed, structural fortifications designed by a mind that has had infinite time to think about how walls fail. Ranger has infiltrated it four times. For fun. This tells you more about Ranger than about Keter's security.
A fortress-city of the dead — walls of bone-white stone rising from poisonous mist, waters choked with corpses, structural defenses refined over centuries of siege warfare. The air itself is toxic. Nothing lives here. Everything serves.
Also known as: Keter, Kingdom of the Dead