One of the 3 lies that Dany has to slay from the HOTU. "A great stone beast takes flight from a smoking tower, and breathes shadow fire" (paraphrasing).
I have 4 different ideas of what the stone beast could be:
1. Greyscale- This could be Jon Connington spreading greyscale in kingslanding. The shadow fire being metaphorical for the spreading of greyscale.
2. Euron- The other 2 lies, Stannis and Aegon are claimants to the throne, so it would make sense that the 3rd be Euron. Maybe
Eh, I don't have any really strong feelings for this one way or the other. I'm just suggesting some of the textual support for Jon if indeed he does fit the role. Speaking of which, the smoking tower, may turn out to be Hardin's tower, Jon's former domicile, the current domicile of Val and other wildling women, and the backdrop of where Jon was knifed (to death?). Especially if the following texts turn out to be tongue and cheek foreshadowing:
As for Jon, my gut feeling is that we're