Dark magic. Right. Makes sense; it's got a very... familiar feel to it. Speaking as a Muggleborn, nobody with any sense would dare to pull something like this against Purebloods. Could you imagine what would happen to a Muggleborn in Azkaban if they got caught?

And the thing. It's... um, I can see it. It looks like me, only a smirking, mocking shade of me. As for what it says... it's very, er...

Truthful.

... candid.