Underdark

The Underdark is an underground area in the world of Critical Role and in general RPG games such as Dungeons & Dragons.

During Vox Machina's travels in the Underdark, a series of rumbling noises would occur. They later learned from an Illithid named Clarota to keep still so as to avoid attracting unwanted attention.

Creatures
Many different, usually hostile creatures live there.
 * Basilisks
 * Bulettes
 * Duergar
 * Goblins
 * Illithid
 * Ogres
 * Trolls
 * Umberhulks