You know there is a flaw to the game as Wiccans would never cast a spell death.
Wiccan morality is largely based on the (often misunderstood) Wiccan Rede: An it harm none, do what ye will. This is usually interpreted as a declaration of the freedom to act, along with the necessity of taking responsibility for what follows from one's actions. Another element of Wiccan Morality comes from the Law of Threefold Return, which is understood to mean that whatever one does to another person or thing (benevolent or otherwise) returns with triple force.
But enough nitpicking,lol, we'll just consider them a rogue coven.