i'm game for something like that, sure. the biggest issue i could think of with that is that thus far all information about the world and magic have come from you – so you just gotta make sure everything that this new person comes up with follows your rules, and whatever they contribute fits in with what rules you've already established. other than that, having a character who's [i]not[/i] having to learn everything about magic and traveling on the fly might be interesting.