Key to Time

Right, dream on! As if I'm going to give away the key to the world's safety just like that. No way!
And it wasn't me who built that prison.
What I can do is try and persuade it not to capture you two. Here, take this brooch. If that blue astronomer knows anything about magitechnology, he will figure out what to do with that.
And you... Whatever you're up to - be as careful as possible. Don't do anything stupid.

A brooch?
That is quite a clumsy attempt to track us, but we’ll pretend we didn’t notice anything. I assume her curiosity is justified in this case.
So, I need to install this brooch... right here. And adjust something here. Alright, I think the Observatory doesn’t mind. Let’s do it!