With Xin Yun's current strength, as soon as he executed Soaring Clouds and Mist, in just an instant, centered on Yinglong, endless clouds and fog appeared within a thousand-meter radius. Yinglong's body would also be obscured by the clouds and fog, which could indeed be described as seeing the head of the Divine Dragon but not the tail.
What are clouds, and what is fog? Although it might not be entirely correct, according to Xin Yun's understanding, what's in the sky is called a cloud, and what's near the ground is fog—they are actually the same thing.
Of course, this so-called Soaring Clouds and Mist was only preliminarily mastered by Xin Yun, and the density of the clouds and fog was very low, but Xin Yun believed that with the enhancement of his strength, the density of these clouds and fog would gradually increase.