I recently had occasion to use a rot grub-like creature. Good for when you want to throw a little risk in to balance out a reward the players perceive when finding a stash of books for the taking. It didn't work for me to deter persistent book collecting. How do you handle it?
https://mindweaverpg.wordpress.com/2020/12/08/biweekly-monster-book-worm-add/
The party ended up getting a little sidetracked by a whole nest of ogres.
#playreport
https://mindweaverpg.wordpress.com/2023/06/30/play-report-kotb-barrier-march-session-52-surprise-ogres/
Searching for more information about the lay of the land around the bugbear crag, the party ends up ambushing a patrol, but when the ambush doesn't get surprise, the battle is far more even than intended.