It's not probable... but it's possible. And if I've thought of it, he might've done it. 

[ in the absence of concrete data, Fitz has mostly settled on preparing for the worst cases he can wrap his head around.

But for now, he sketches out an overview of the courtyard in Hellburbia, with a fairly large blank spot near the center. If Daisy heads out that far, she'll find a stilted mansion guarded and protected with layers of magic. ] 

I don't-- remember what's there. And that generally means that it's something dangerous. I'm being watched by too many eyes to try and figure it out for myself.