Ning Fan seemed to have gained some understanding about incarnation. The word "incarnate" actually contained the supreme dictum of multiple transformations.
Some of the old monsters who mastered the incarnation technique could transform and turn themselves into a fly or a flower to disguise themselves.
There were also old monsters who could transform into ferocious beasts that granted them strength beyond what their original bodies were capable of.
The truth was the incarnation technique was a technique that allowed one to change their physical form.
Ning Fan turning his physical body into nothingness was, in fact, also a change in physical form.
However, if he only knows this single type of transformation, he would not be able to defeat the incarnations of the young immortal emperor in front of him.