You just proved that Sara and Zero are more mystical than magical. Sara is a shaman. A priestess. The Guardian of the Wind. In ep-4, she was being trained in the secret knowledge of guardianship by her father.
I think the term to use with "witchcraft" is "sorcery", and not "magic". But at any rate,
Magic means magic. Like pulling a bunny out of a hat. For cheap entertainment purposes. It involves sleight of hands and fakery through illusions, smokes and mirrors. Etc, etc.
Such "qualities" that are not found in Zero or it's characters.