"Why fight the thing now, then leave without taking care of the person who created it? Even if you manage to kill this koshchey, won't another one be created to take it's place?" Sara had a great deal of knowledge of her own magic, and the basic knowledge of other magics in the world, but she had avoided dark arts like the plague. Not only was it warned to her that it could take her very soul, she just couldn't bring herself to do any sort of evil to anyone. For goodness sakes, she couldn't even kill spiders, and she utterly detested those!