Rise of the Runelords
Quasit Witch and Worshiper of Lamashtu
Erylium is a tiny demon who ruled the Catacombs below Sandpoint.
Arcane Investigations confronted and defeated Erylium in the Catacombs below Sandpoint. They know that Erylium recruited Nualia and taught her about the ways of Lamashtu, but not much is known about her otherwise. It is unclear how long she spent in the Catacombs or why she stayed.