For all of your dopy-riddle-giver needs, I present the anurasphinx. My daughter thought a frog sphinx would be hilarious, but then was disappointed when it wasn't made of stone.
https://mindweaverpg.wordpress.com/2020/12/22/biweekly-monster-anurasphinx-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.