Francesca's metamorphosis

Introduction

I once leafed through a book about metamorphosis, but I think it was more a work of fiction than a scientific study. Seriously, enchantments ˗ because that's what we're talking about here ˗ which can change people's and animals' appearances are very powerful. I don't want to bore you with the details, so let's just say that this kind of spell leaves traces. I can help you to detect spells of this magnitude, but I'll need a few ingredients to do so.

Cunclusion

Here it is! You can give it back to me, in exchange for a few coins, when you've finished with it.