Jon flew through the storm while warping himself and Nicolus in a thin layer of his flaming cloak.
The storm was going on heavily right now.
There was no way even a spirit beast could be flying in this weather let alone a cultivator. So, there was no one observing the sky that was obscured by the heavy storm.
They didn't think for a second that anyone could be flying above the cloud. Not only was the weather terrible weather, there is also a thin amount of Nether wind blowing at that level in this part of the plane. That thin layer of Nether wind works as a barrier in the sky between the two countries. It makes an invasion from the sky almost an impossible task.
Things that could fly at that level are few in the whole world. And none of them are something people could fight against.
However, the way Jon was now, he didn't feel anything while flying in those heights. He and Nicolus were able to cross a lot of distance in a very short time.
