The Lycanthrus Flower is an extremely rare magical flower with thorns that secrete a venom that turns those it infects into werewolves but the flower's petals are the cure.

The Lycanthrus Flower blooms only once every hundred years and during a full moon, but once the moon sets its magical properties are lost.

As such, it is the focus of Greywolf to restore his brother and sister to their human forms, as well as the sorceress Mesmira, to create a legion of werewolves under her command.