Venture into boreal forests, dazzling frozen heights, and the unknowable deep frost in the Soulfrost Expanse, an expansion of arctic goodness! Meet the Isark tribes, and the terrible Heralds of the Killing Frost.

In addition to all the content you know and love from Ariadne's Codex, this edition has plenty of variant rules and other experimental content for you and  your party to enjoy a unique, unusual D&D experience.