From publisher blurb:
Swans of Black is an innovative supplement for 5e D&D, providing both story and mechanics for major world-changing campaing plotlines. It is the product of a delightfully successful Kickstarter campaign by Scrivened, a coming together of mechanics-savvy writer Ryan Chaddock and brilliant illustrator Avery Liell-Kok. It contains four core storylines, called Swans, each an unpredictable and unfathomably destructive shock to your campaign world. Each is married with a set of character options to allow players to participate and make their characters part of the evolving plotline.
Plunder this supplement for useful narratives, NPCs, and cool powers. The tome is loaded with goodies and beautifully illustrated in full color, with accompanying character portraits for each chapter. Swans of Black represents Scrivened's dedication to interesting ideas and artful presentation.