The word ingredients made me think of what I have seen, and I am still getting used to the possibility of that our fairies may not be as “good” as my mind makes them.
Where do you get evil fairy dust? Is it stolen? Is it procured in a similar way by an evil fairy picking it up once a year?
I’m still leaning toward the idea that Rumpel is not the creator of the Dark Curse, and so I am definitely open to the evil fairy idea.