Netherdeep

The Netherdeep is "an underwater realm of gloom, corruption, and sorrow" in Exandria and described as "a terrifying cross between the Far Realm and the deep ocean". It was first mentioned in the announcement of the upcoming Critical Role: Call of the Netherdeep and is one of the adventure's significant settings. Chris Perkins described the inhabitants of the Netherdeep as "unique", saying: "There's something abnormal about the Netherdeep."

Trivia

 * Chris Perkins described the Netherdeep as "a novel location" among D&D adventure settings.
 * Matthew Mercer suggested that the Netherdeep has long been part of the lore of Exandria: "Getting to bring a direct adventure book within Exandria to life is really such an exciting thing, especially exploring ideas and elements I've never been able to bring to a campaign myself yet."