Thirteen generations ago, the ambitious first Duke of Magnussen made a fell pact with an unknown power, for but one thing in return: the thirteenth daughter born to a Magnussen duke. Now, generations hence, the daughter of Duke Magnussen XIII is stolen away by a hooded executioner riding a leathery beast to the Magnussen family crypts, where the devilish secrets of thirteen generations have been buried and forgotten - until now! This module also includes the short Level 2 adventure, The Balance Blade. The 13th Skull is a Level 4 Dungeon Crawl.