I'm sure given the ability to sling stones around corners, players will find a use for it. Particularly in the hands of a thief capable of scouting enemy positions and then attacking from an impossible position, I think it has promise.
https://mindweaverpg.wordpress.com/2022/02/01/biweekly-item-yarvins-sling-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.