The Witches Council is a group of high powerful witches and warlocks, consisting of eight members, who are over all witches according to the law. A witch or warlock's powers can be taken away by the Council if a witch's magic is failing or if they refuse to use witchcraft, in which they can the lose their powers forever. If a witch is not careful and breaks the law under the Witches' Council or fails to do something the council members tell you to do, the consequences become bad. For example in episode Samantha's Power Failure, Samantha was stripped of her powers for refusing to disavow her marriage to Darrin. There are many rules a witch must follow in order to avoid punishment.
Cassandra is a member of the council.