This Ars Magica supplement is part three in the Four Seasons Tetrology, and follows in the footsteps of The Tempest. Herein the Storyguide will find the information needed to organize the descent of your covenant from Autumn to Winter. This book consists of several interrelated adventures that detail the collapse and perhaps destruction of a once proud covenant.The characters must come to grips with the malign threat posed by a band of diabolists who aspire to bring about Armageddon. Unbeknownst to the characters, they have been at the root of the diabolists' machinations from their very beginnings. Now the magi must undo what has gone in the past or their covenant will not merely pass into Winter, but may pass from existence.