Because of the Imperishability Chapter, not only was a person difficult to kill, but even erasing the aura within their true qi was no easy task.
Erasing that aura was like injuring a person. With imperishable true qi present, the converted aura could likewise recover rapidly.
Huang Xiao knew that to refine the indestructible supreme demonic qi successfully, he had to burn it with enough heart fire all at once, leaving it no time to restore its aura.
It was like gravely wounding someone: once the speed of recovery could no longer keep pace with the injuries, that person would surely die in the end.
There was only a wisp of indestructible supreme demonic qi in his dantian. Moreover, without its owner's control, the aura of imperishable true qi contained within it was extremely limited. As long as he kept wearing it down, he would surely exhaust it after a while.
Huang Xiao could draw on the surrounding supreme demonic qi to extract countless drops of essence blood. He refused to believe that, with enough essence blood to kindle his heart fire, he still could not successfully refine this strand of true qi.
With that thought, Huang Xiao once again dispersed the indestructible supreme demonic qi in his dantian. Then he used his own heart fire to reverse-refine the supreme demonic qi he drew in from his surroundings, extracting the essence blood of successive Demon Hall Masters from it.
This time, Huang Xiao extracted a full thirty drops of essence blood, each bearing an exceptionally powerful aura.
Under ordinary circumstances, three drops of essence blood should have been enough to refine a wisp of supreme demonic qi. But after his previous failure, Huang Xiao prepared more. He refused to believe that ten times the amount would still fail.
With ample