How about these?:
-An attraction spell that's always a little bit off. For example, attract bullets causes the case to fly across to the target while the bullets stay put.
-Flight/levitation, but the user can only go up- they have to use a ladder or something to get back down.
-Spontaneous solar...
You raise an interesting thought. For my own novel (which I just just published myself- hurrah!), I went for a positivist approach. Legal precedents in my world come from fairy tales and horror movies as well as the real world. I think it has allowed for some expansion on the possibilities...