Call of the Netherdeep

Critical Role: Call of the Netherdeep is an upcoming campaign and adventure module that will be published by Wizards of the Coast. First teased at D&D Celebration on September 26, 2021 by Chris Perkins, the book will be released in hardcover and digital formats on March 15, 2022. It is written by Matthew Mercer and Chris Perkins with contributions from James Haeck, LaTia Jacquise, Sadie Lowry, Cassandra Khaw, Makenzie De Armas, and Hannah Rose. It features cover art by Minttu Hynninen, interior art by Kent Davis, Linda Lithén, Lauren Walsh, Caio Santos, Nikki Dawes, Tyler Walpole, and cartography by Deven Rue, Will Doyle, and Stacey Allan.

The adventure, intended to run through levels 3 through 12, begins in Xhorhas, progresses to Ank'Harel, then moves into a new location: the Netherdeep, described as "a terrifying cross between the Far Realm and the deep ocean". Under the watchful gaze of Ruidus, twisting the fate of those who can change history, adventurers seek to release a forgotten champion of the gods, thought destroyed but instead awakened in his prison in the depths of Exandria.

The book will also include statblocks for new magical items, including those allowing characters to survive in underwater environments, and new mechanics on running a party of rival NPC characters.