Caerworn Castle is an expansion by Zarista Games. It's intended for level 60 characters.

Caerworn Castle is haunted by ghosts and demons and in desperate need of repair. Its occupants are victims of a feud between two brothers, prolonged by Lord Alderley who wishes to extend his power. Are you frightened of ghosts and the evils of the night? The ghost of Lord John Sheets, the father of the dueling brothers, waits in Caerworn Castle for you to give him rest.