"It's not its real name, but when I was fourteen it pretended to be a rock named Iggy to talk to me. It's sort of an - evil god? It's a Power. And it's really unclear how powerful the Powers are, like, I'd be surprised but not astounded if they could reach across worlds with something like an offworld wizard to get their attention. And every time a new wizard comes to be, it tries to kill them. Jellybean and Matilda saved my life."