Rise of the Runelords (RPHaven)
Erylium is a Quasit found in the catacombs beneath the Glassworks at Sandpoint. She works with a mysterious pool that can spawn Sinspawn. Her defenses were so powerful that the Heroes of Sandpoint fled before her.
They returned the next day, but she was prepared for them with more Sinspawn. Despite this, they were able to defeat her when Ilamin grabbed her and then bit her head off.She melted into demonic goo, sending her back to the Abyss.