Part 2 - Dream a Little Dream
Mephistopheles cancels his attack. He once bit a toad, which looks a lot like a frog, and it tasted really bad. Not something he feels like repeating.
Instead he asks the rather melodramatic creature, "When did this happen? Was it a gradual change, or did it happen suddenly, quickly, and without warning? Do you have any enemies who could cause this, that you know of?"
Then, as an afterthought, "Have you done anything that might have upset the Universe?"