The Eldest call it Blachach, the Dwarves call it Blackhold, the Drengr call it Shakarn but the name is the same no matter what the language - Curse.
In all the realms, no place is as feared or hated as Curse. The victim of a horrible disaster in its distant past, its misfortune is now the fortune of all.
The city rests now in ruin. Mists which choke and strangle the streets hide many secrets both dark and dangerous.
Across the lands, many travel to Curse. Some for gold, some for treasure, some for redemption. Few will find it. Most will die trying.
This systemless setting book for any TTRPG takes you into a forbidden city of secrets. Good luck.