Sometimes. I've never fought anyone for real but I think it's more of a training thing or maybe there are some bad shinki? I've only met a bad god before though...borderlines work against gods.

[Goten gives a small shrug again. He's not too sure and hasn't really thought about why a spell that only works against shinki is useful. It was just fun to learn.]

I donno if it counts as fighting either. The spells I know, Umbra, Silence and Bind only turn me or a person invisible. Then Silence makes it so you can't talk and bind makes you stay still.