A servant of Elderxoln, Quaelar is focused on the hybridization of different beings. Keeping things on brand for Elderxoln's cult, this is primarily a focus on combining humanoids and snakes in various forms.
Cassian and Yarfik nearly escaped his clutches, until Yarfik's attempt to kill him for his blasphemous work led to a fight in which Quaelar was able to overcome the pair. He subsequently removed a hand from each of them. The reunited party would later best him (rendering him unconscious), with Yarfik slitting his throat unbeknownst to the rest of the party.