Cop, it would be easier for you to come up with such a spell for Caroline. And we will all get the skill after five missions. So, we don't need a "specific thing that is only useful for one or two characters."
I'm not sure about Caroline's spells; it wouldn't be in character, as she specializes in mind magic. Besides, after we got the "genie," I started thinking about changing religions, to be honest. It would be cool to start learning from her. But first, we need to invent a spell, and then we can.