Name: Shadow Crystal P/W/C Type: Power Appearance: A shard seemingly comprised of solidified shadows and twilight Description of Function: The person who touches this with their bare flesh will be instantly transformed into an animal which best fits their inner self. The crystal may be deactivated with a thought. Limitations: The crystal cannot be used again until the next time of changing has come (dawn or twilight). If a time of changing comes when the user is still transformed, he will be forever trapped in his animal form.
Eh, maybe it's because I prefer some consistency with canon, but I'm not terribly thrilled with the idea of something canonically created via evil magic as a way to trap someone in some form permanently be used as a lycanthropy on/off switch. Perhaps if it were made for an offensive purpose, Quill, such as forcing it into a person and trapping them in a different form until it can be removed by a priest or something?