Black Holes and stars: black holes are always present within a star and are a key component.
Rekei: A sham. All persons have the power to heal their own injuries without the aid of an outsider. I come to this because a requirement of the practice is for he being held to believe that rekei works which in turn gives the practitioner the power to heal.
Being rich: The worst thing that could ever happen to most people. It could cause someone to destroy themselves or become excessively bored.
