"Magic is...it's like using a sword. It's a tool, and how it gets used depends on the wielder," Merlin explained. "A sword can be used to both to harm and to protect. And sometimes you might not want to use it to hurt anyone, but it's necessary if you want to keep your friends alive and safe." Merlin smile wistfully. "Your magic isn't like that though. I don't think your could ever harm anybody."