[If only it were that easy, Fenris.]

What do you know about how it works. Before you object, I'm not asking for any theory, just how casting spells is usually done.

[Because this is the hurdle he has to get over for the both of them. From what he knows of magic, it should be fundamentally impossible to do what Fenris is doing by accident. Magic was an art of intent. But it was also true that impossible had little bearing here and that young wizards sometimes had their magic twist out of their control in small ways.]