Misthollow Castle

From publisher blurb: AN ADVENTURE by R P Davis FOR Odysseys & Overlords SUITABLE FOR 4-6 CHARACTERS OF 5TH– 10th LEVEL Standing on a lonely, bare mound in the bottom of a dell full of swirling fog, a castle from the time of the Schism crumbles, forgotten. Inside, treasures—and terror—await. A writ of salvage has been posted in Chandra's Haven: 500 gold coins to the brave adventurers who find Misthollow Castle and secure it for Salamon Castos, a wealthy merchant. Castos claims to be the scion of the noble family which ruled Misthollow and built the castle generations ago. Castos grudgingly agrees to allow the characters to keep whatever they find in securing the castle, though he insists on right of first refusal on anything of value.