[quote=Marra Mistborn]
-Curious face- Is the Cardinal going to try and enter Mayelin territory this season?
[/quote]

That is correct. If you disperse the illusions so he can actually get in, he will wander around and see what's going on. You wont get the diplomatic result until the start of autumn, however. You can just make it so he cant' though, in which case everything remains a mystery to the humans and indeed the Papacy.