| Category | Subterranean |
| Continent | Brucrumus |
| Region | Slilp-Urp |
| Map | Mo'palos |
The Plague Gullets were breeding grounds for otyughs, lethal molds, and other horrors that thrive in regions of decomposition and decay. The first Plague Gullet emerged in the sewers of Andibutt. This city had become a refuge for mortals fleeing the Primordial invasion during the Dawn Era. The primordial lord Mephirouth dispatched his agents into the city's sewers and initiated the process of transforming this cesspool into a spawning ground for his unpalatable, disease-carrying minions. These included the previously mentioned entities, as well as millions of rats, hordes of dire rats, rat swarms, and plague spewers. Andibutt endured years of plague and death from the sickness brought forth by all the disease carriers emerging from Andibutt's Plague Gullet. In 8419 DE, ten years after Mephirouth began his misdeeds, Andibutt was abandoned and then set ablaze by forces of the Nawirrûs Covenant. With no more hosts in the area, Mephirouth lost interest in the place and moved on, leaving his minions behind, many of whom turned to preying on each other or perished from starvation.
The second Plague Gullet formed in the Triton stronghold of Natar. This bastion served as a training area for angels and other water-breathing Nawirrûs forces. Here, the tritons trained those who could breathe underwater and move around, but lacked the skill in underwater combat like those born to the element. Natar was built half underwater in the deeps of Nielalroch and half into the open chasm of Irôchâr Plunge. Similar to Andibutt, nefarious agents of Mephirouth came and contaminated the area, forcing it to be abandoned for nearly five centuries. Today, Natar is a formidable triton city-state.