Magic Forums

Hi, so to be short, I am put in a situation where the only mean to stop someone from harming is to harm that someone. No other ways, no other more gentle options are left. That person will not stop until I make him, and the only way I can is black magic. But before I do anything, I just tried to inform myself of the possible cons?quences (not that they could stop me) and all the articles I found said that forgiveness and other white magic methods are key, that karma will come back to me if I harm someone, that black magic is dangerous. But if I use evil to do good, to stop a greater evil, is that still a bad thing? Isn't it what Knights do with dragons by Killing them and we call them heroes and saviours?