Add a way to undo polymorph

[Roomba]

I was thinking about it and came up with a compromise that might work:

When a wizard uses Polymorph, it inflicts a disease on people, similar to the cluwning disease, that takes effect over a minute or two. During this time if they get the disease treated they can be cured, but once it progresses fully they turn into a random animal and their fate is sealed. Anyone who actually wants to be an animal can just hide in a closet until their disease progresses fully.