Two wizards and two soldiers appear in the desert, a few feet away from a tired slave caravan.
They nod at each other and disappear again.
They consult.
"Is he going to be able to write? I don't see easy access to writing implements anywhere."
"...he doesn't have a mouth, so maybe he can do sign language and we'll be able to see through the scry? Does the magic work on that?"
So the message that is decided on is: "alternate universe you working on interdimensional cooperation. can observe you and read signed languages, or writing. indicate a good way to communicate further."
"I don't know if we can rely on the translations lining up closely enough. She does have a title you could translate that way."
"Well, sometimes if you're being observed that's not a smart thing to suggest. You can read blue centaur body language? Confidently on the first try?"
"He kept it to four words and barely moved his hands and didn't provide lots of information it'd be useful to have and is now moving exactly like before the message arrived."
"Not to hand but I'm sure there's one to be had. Telepathy's communicative, it only reads what's directed at the recipient."
"Else Belmarniss would've twitched. Though it might spook the Imperatrix, if she's that."