Curse of the Crimson Throne
Advanced Elite Devilfish
Washed deep into the Mushfens decades ago by a winter storm, the already huge Beirawash ended up lost in the swamp. After navigating the deeper waterways, he eventually discovered the large pool at the base of the Sunken Queen—and the boggard tribe that dwelt nearby. After eating several boggards, Beirawash (being unusually perceptive and smart for a devilfish) realized that the surviving frog-folk were bowing down before him in supplication. For the next several decades, Beirawash lived as the god of this tribe, which pleased him mightily.
That arrangement is over now. When Ileosa arrived, she swiftly charmed the devilfish and several of the boggards, turning his role in the region from living god to guard dog.