"Okay. Uh. I've never explained this to someone who'd never heard anything about how magic works where I'm from before, so tell me if this doesn't make sense. I'm a priestess, which means I get my magic from a god — in my case Calistria, but I think almost all the gods sometimes pick priests, except the really little ones." Lots of places have laws about Calistrian priests, or just make them totally illegal, but it seems pretty unlikely that a bunch of vengeful rebels are going to be bothered. "Uh, I don't know which gods people mainly worship here, if they're different it might be worth going through the ones I know of that don't suck and seeing if they'll choose any of you if you know about them."
This would be so much easier if these people were familiar with the concept of priests that can cast spells, or even just spells.
"Every day I can ask Calistria for some spells — uh, to do that I have to pray to her for an hour, starting at dawn. Spells are... uh...... they're like, specific things you can do with magic? The Share Language I cast on you is a spell, the Remove Disease was a spell. There's a lot of different spells, I can list some of the ones that I know are especially good for fighting but it might also be good if you list things it'd be helpful for someone to be able to do. Most of my spells can only be cast once — or, uh — she can only give me a certain number at each circle every day, and she can give me the same one multiple times but then it counts multiple times towards the total. Uh, a circle is like, how complicated the spell is, higher-circle spells are usually better but not always, I'm third-circle right now. But I also have, uh, we call them 'orisons', which are spells that are so simple I can cast them over and over as many times as I want. The orisons I've got today are Create Water, which, uh, creates water, Light," (she taps her glowing holy symbol) "which makes things glow for a while, Guidance, which... makes people a little better at something they're about to do, that one's kind of hard to explain if you've never had it cast on you, and then Virtue, which makes people a little tougher for a little while. The channel I did earlier's not a spell, I get four of those every day. Some priests get a different kind that hurts people instead, it mostly depends on whether they and their god are Good or Evil or Neutral. —And I can turn some of my spells, not the orisons but the other ones, into healing spells that just heal a single person's injuries. And then there's a couple other things I can do, and a couple things that are more complicated about how priest spells work, but that's most of it.
...Did that make sense?"