The original sketch was done in a sketch request stream by  cervelet You can see the original sketch, along with several others, here: https://www.furaffinity.net/view/38749720/ (mine is the 6th one down).
So, my Bog Witch decided she needed a vacation. Everybody needs to get out of the swamp from time to time. That said, just because you're on vacation, that doesn't mean you have to stop doing your favorite hobbies. So, she decided to turn a couple of beach-goers into toads.
Only . . . something seems to have gone wrong with the spell.