I'm speaking with the certainty of someone that's wielded magic on several occasions, due to the situation requiring it, with one of said situations being replete with toadstools and -

[A deep, deep sigh.]

A pointy hat.

[He rolls his eyes and looks faintly embarassed.]

I mostly did it to impress a girl.

A fascinating - and irritating - facet of my universe is that almost anyone can meddle with the dimensional fabric, provided they have access to the right knowledge and some aptitude for the more procedural aspects.

Throw together the right nonsense soup with the right words and a completely random person with no meta powers can turn someone else into a frog. It's a scientist's waking nightmare, trust me.