It's been a long time since someone's asked her a question like that. Meja thinks for a long moment, as they walk. "Magic is a life-force of sorts. It's hard to define. I presume it comes from the world itself, perhaps from Yggdrasil. You can do a great many things with it. Set fires, imprison others, freeze water, protect a forest from specific threats — there's very little you can't do with it, once you learn it properly. Though the bigger things get, the more tiring they are on the person who created them."