Xu Changxing suppressed the sudden insight, then began extracting the Demon King's blood essence.
Since Points were difficult to obtain, spending them on Body Tempering cultivation would be rather extravagant.
Exchanging Demon King Crystals for Points and using demon king blood essence to temper his body was the way to maximize his gains from killing Demon Kings.
He simply followed the course of the simulation and settled there temporarily.
Over the next few months, he refined all the demon king blood essence into Qi-Blood Pills and used them to raise his Body Tempering cultivation.
Between his cultivation sessions, he also found time to offer guidance to Leng Qi and his two companions.
The earlier conversation between the three had considerably raised Xu Changxing's expectations of Leng Qi.
So he spent a few days creating a combat technique tailored to Leng Qi's constitution.
To Xu Changxing's delight, he unexpectedly gained an insight while creating the technique and broke through a minor realm, advancing his cultivation another small step.
Though it was only a small step, it had saved him at least several years of ascetic cultivation and brought him another step closer to void refinement peak.
Only after assimilating his gains did Xu Changxing set off again.
He did not go looking for trouble with the neighboring Demon Kings.
If Demon Kings in adjacent territories died one after another within a few years, it would easily attract the attention of nearby Heavenly Demons.
Even fleecing sheep was not done like that.
Xu Changxing traveled several thousand miles with Leng Qi and the others before finding and killing a relatively weak Demon King.
This time, he rested in the Demon King's territory for several months before setting off again and killing another relatively weak Demon King several thousand miles away.
Over the