"It's just-- they just are. You can't just tell at the air 'Hey spirits, come on over! The kettle's on!' and make us appear here. You have to open a gateway for us to travel through. Pentacles are the popular means because they're quick, relatively easy, and don't require any real work on the part of the magician. Great for lazy old sods who don't want to do any of the heavy lifting involved with traversing the planes." His hand is moving all the while, sketching the outlines of runes and the beginning and end marks for lines that he directs her to fill. There's no reason to share any of this, of course. He should instruct her to shut her mouth and do as she's told, hold the back chat, and can't you see he needs to concentrate? Because never tell a magician - even and maybe especially one who insists she isn't anything of the sort - more than you have to.

But really, what's the worst that could happen? She might learn a thing or two about pentacles, but it's not like she knows the words to summon him back with once he goes. And who doesn't like to hear themselves talk about a subject they know everything about and despise? And do you know how long it's been since he could talk about any of this at all? He'll tell you what, it's been a real trial being the only person in the room with any context for anything.

So chat he does.