[She pauses, pursing her lips, clearly going over everything she's learned--and then she sighs and shrugs.]

They were called Galdr, but we don't know very much about them, anymore. The people who used them died out a long time ago.

[oh well, onto more important things--]

I bet there's a way to do something similar with your magic. It's just a matter of trapping it in something that can contain magic for a long time...