Dwarven beards are rich habitats for the enterprising critter.
Patron deity of the Cult of Done, Othamm is always working to counter Mathom's influence.
When Vegma, Judge of the Dead, was called away to witness Mathom's trial, he left Slys in charge of the recently deceased. Intended as a simple placeholder, she has come to be something more.
"Many strange things may be seen in the Great Swamps, not all real. But I tell you, there was a ship and it was real! Well it was old and all sails torn and had many holes in the hull... but anyway it was hundreds of miles from the Sea! How it came to be there, I can only wonder..."
(If it is not a hallucination, may be inhabited by wererats.)