Wang Ling kept on killing for days, following the path Chang Ping acquired weeks prior.
Of course, Wang Ling slowly grew winded, swinging his sword expends his qi and strength, and as he needed to be constantly moving to avoid being surrounded, his strength quickly got sapped away. It was a precarious situation, but he did not stop, instead, he used that chance to push himself past his limits. Focusing himself on breathing and then using as little movement as possible, Wang Ling's efficiency in killing increased several folds.
Slowly, the barren lands filled with seething despair of death slowly transformed into a whetstone and by the ninth day, when Wang Ling's qi could no longer keep up and another bloodline ignition could not be started for a long time, Wang Ling finally found himself.