Otyugh

An otyugh is a tentacled aberration that gluttonously consumes waste, sewage, and carrion. When consuming live creatures, otyughs kill their prey through tentacle constriction and their diseased, filthy bites. Their appetites are nearly impossible to sate, and they typically dwell in sewers or pits where they remain fairly sedentary as long as their preferred sustenance abounds.

Encounters with Vox Machina
Part of Vox Machina, along with Kashaw Vesh and Thorbir Falbek, encountered and fought an otyugh in a cistern below Vasselheim during the Slayer's Take trial, with Keyleth dealing the final blow.