Brimmus is a large, powerful fire elemental that was captured by the Ossuate and later freed by the Cursebusters from a magical holding cell deep in the Splintering Halls. He possesses a fair amount of raw strength and magical abilities that result from his innate connection to the Planes of Fire.
Brimmus was rescued from the Splintering Halls when the Cursebusters freed him from his shackles by pouring water on him to shrink him down, allowing him to slip out. Brimmus accompanied the group through the rest of the dungeon, helping to undo the magical dampening field restricting his powers. He assisted Kel Stevaen by teleporting the massive Unknown to the Planes of Fire, to be retrieved at a later date. Brimmus escaped the dungeon alongside the Cursebusters, ending up in the Hands of Love.