From the back of the book:
Entombed in the Ice
The witch queens of Irrisen must abdicate their thrones every 100 years when their mother, Baba Yaga, places a new daughter on the throne. But one queen was unwilling to relinquish her rule, and led a doomed rebellion against the Mother of Witches. Afterward, Baba Yaga entombed her wayward daughter in an icy necropolis known as the Veil of Frozen Tears, along with a powerful artifact called the Torc of Kostchtchie, hiding them both far from mortal eyes.
Now, almost 500 years later, the tomb has been found, and the race is on to plunder its treasures. Will the PCs follow Elvanna, the current queen of Irrisen, in her attempt to recover the Torc, or will they join forces with the demon lord Kostchtchie? What secrets does the Veil of Frozen Tears conceal? Can the PCs reclaim the lost artifact and keep it from those who also seek its power, or will they fall victim to the denizens of the tomb and end up as eternal guardians themselves?
The Witchwar Legacy is an adventure for 17th-level characters, written for the Pathfinder Roleplaying Game and compatible with the 3.5 edition of the world's oldest RPG. The adventure features an icy necropolis frozen in time, cursed dragons, twisted giants, and the fell magics and devious riddles of the Queen of Witches herself! It also includes a description of the frost giant fortress of Holvirgang, and a new monster, the extraplanar scions of the titans called the Abyss gigas.
This adventure is set in the northern reaches of the wintry land of Irrisen in the Pathfinder campaign setting, but can be easily adapted for any game world.