A Demon King's blood essence was the concentrated essence of all its blood and vitality, far surpassing ordinary Demon King blood in quality.
A single drop of Demon King blood essence was worth a hundred liters of ordinary Demon King blood.
However, such high-grade material posed no small challenge even for a Pill Refining Master.
Fortunately, Xu Changxing's realm was high enough for him to use his primordial spirit to assist with pill refinement.
In just over half a month, he refined nine drops of the Demon King blood into supreme-grade Qi-Blood Pills.
The quality of these Qi-Blood Pills did not disappoint Xu Changxing's expectations.
Just five months later, his Body Tempering cultivation broke through the Heavenly Gang Realm and entered the Inner Landscape Realm.
As he had expected, the Inner Landscape Realm allowed him to work from the outside inward, sensing every minute fluctuation around him through the fluctuations of his blood and vitality.
However, the world he sensed through fluctuations of blood and vitality differed subtly from what his primordial spirit perceived.
Xu Changxing spent roughly half a month adjusting before he finally grew accustomed to perceiving the outside world with both forms of perception at once.
Only after he had completely adjusted to this sensation did he discover, to his delight, that his ability to perceive the outside world had improved considerably again.
Previously, sensing the outside world with his primordial spirit had felt like opening a heavenly eye. Though he could see with great clarity, he always felt something was missing.
Now, with the additional means of sensing the outside world through blood and vitality, it was as though he had opened another heavenly eye.
The two heavenly eyes observed from intersecting angles. Though his sight was no clearer than before, his grasp of distances and