Witchlings

"Every year Witchlings who participate in the Black Moon Ceremony are placed into covens and come into their powers as full-fledged witches. Seven isn't placed in one of the five covens. She's a Spare. Seven invokes her only option. The three Spares will be assigned an impossible task: If they work together and succeed at it, their coven will be sealed and they'll gain their full powers. If they fail--Well, the last coven to make the attempt ended up being turned into toads"--Adapted from publisher.