"With practice, I will get stronger. More skilled. I would be able to wipe out an army, just like the dragons, and so much more." With this explanation, Sansa finally realised the extent of the possibilities. This was not a parlour trick. The Conqueror took the seven kingdoms with the might of Dragonfire. If anyone knew that Jon could unleash similar devastation without dragons, many people would not rest easy while he still drew breath.