It either restored hair or removed it...

OLD MAGICKS

The spell was either two parts errot root, and eight parts fenno berry, or it was eight parts errot root, and two parts fenno berry. It would certainly be more convenient if it were the first way since fenno berry was terribly expensive in the winter, and it smelled dreadful, like decaying eyeballs. Maybe it was two parts eyeballs and eight parts errot root, and there was no fenno berry. Ellis had trouble remembering. He’d been alone in this tower far too long. They only remembered he was up there when they needed something. Like now: the prince was balding.