Blood witchcraft, as its name implies, is witchcraft that uses blood as a medium.
Even within the Wizard World, Blood Mages who study blood witchcraft are beings shunned and ostracized by others.
Some wizards, who pride themselves on their high moral standards, scorn Blood Mages even more, unwilling to associate with them.
The reason is nothing else but that blood witchcraft is simply too contrary to ethics and morality.
Although wizards are a group that hovers on the edge of the law, in the eyes of ordinary people, they have no taboos and dare to explore and offend anything; hence, they are often associated with words like evil, bizarre, and sacrilegious.
But wizards are human too; even if they disregard all taboos and wander on the periphery of the law, they are still human. Since they are human, they care about ethics and morality, about that invisible conscience and retribution.
