In the fifth chapter of my MLP Fanfic “Celly vs. Earth” three very well known foes appear on earth, stripped of their powers and transformed into humans, for reasons yet unknown.
Here are Tirek, Cozy Glow and Chrysalis, aka Tarek Bulba, Cassie O´Glower and Regina Cryssal, in their exiled human forms.
Haven’t read the fanfic, but it seems to me Cozy would be the most dangerous in this scenario simply because she didn’t need any extraordinary magical powers to begin with.