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Forbidden Arts and Dark Arts are umbrella terms for magical practices that are banned by Brotherhood of Sorcerers or other regulating bodies due to their inherent danger or immorality.
They involve, among others:
Fire magic is also sometimes counted,[6] but it appears to be discouraged rather than outright forbidden. Mistress of Fire magic, Klara Larissa de Winter, was a respectable mage and the foundress of Aretuza.[7]
In other cases, spells can be strengthened by using one's own life force, sometimes to the point of killing them.[8]