Swamped

It looks like an old key. A very old key. You don't see what she's getting at...

Wait a moment.

"Does that open one of the cages?" you ask.

"Oh, good. You're not completely thickheaded. So would you care to take a guess as to where the rest of the keys are?"

"In the hands of whoever is planning this attack of yours? Is that what you're getting at?"

"Good guess, but it's only mostly right. There's one other key they don't have."

You're starting to get annoyed. Why can't she just explain things, why does she have to circle around the stone, just like when she wouldn't tell you about the training grounds directly... wait a minute.

"Are you saying the last key is at the training grounds?"

"I'm sure there's someone at your temple who'd know for sure," she replies. More of this circling around the stone! It's so tiring.

"Very well, then. Give me the key and send me back, and I will send a warning along."

"I need the key to help you."

"That key is a sacred relic. Besides, what good is it to you? All it does is open an empty cage."

"And let you lock it up again," she says, putting the key back in her pouch.

You don't seem to have much negotiating leverage here. You do need to agree to something if you're going to get out of here, and she's given you plenty to allow the temple to evaluate her warning. But that key is too important to leave in the hands of a stranger. You could be kicked out of the priesthood if you just let her hold onto it.

What should you do here?