Frostgrave: Perilous Dark

From BoardGameGeek:

There are many tales of the Frozen City, and not all of them tell of battles between rival wizards. Often, the greatest adventures are those that pit a wizard and his trusty warband against the myriad perils found amidst the ruins of Felstad. This new supplement for Frostgrave presents full rules for playing solo and co-operative games in which feuds and skirmishes of wizards take a back seat to the exploration and unlocking of the mysteries of the city. These include guidelines for both dungeon crawls and adventuring in the ruins, new traps, unique random encounters, and four multi-scenario mini-campaigns to get players started. Why should wizards fight amongst themselves? There is plenty of treasure for all and the Frozen City is enemy enough!