The so-called "Light of Immortality."
It was a unique power that only cultivators who walked the path of Body Refiners could condense. Because it could resist the decay brought by the passage of time, it allowed Body Refiners to remain at their peak at every moment.
Thus, it was named—[Immortal]!
But this did not mean it had reached its peak. From the earliest Marrow Light, to Bone Light that spread through every bone, then to every piece of flesh and blood, every tendon and meridian, as well as every structure of the human body including hair and nails.
It would further forge an Undying Body.
Fifth Tier Perfection meant the Undying Body had initially been forged. The appearance of the Time Furnace was for the sake of further catalyzing the body's growth and obtaining even more power.
The two combined and entered a furnace state.
The first purpose of the Time Furnace was to help a cultivator transform the vast "nutritional foundation" brought by Nine Condensations Nine Dispersals into the first drop of Primordial True Marrow, achieving a breakthrough in quality.
The second purpose was to nurture and refine the will at every moment, causing the spiritual instincts hidden within flesh and blood to grow further, then imprinting them with one's own will.
Thus achieving "Spirit-Body Union."
This will was similar to the Primordial Spirit in the common sense, yet also different. To be more precise, it could be considered a fusion of the Primordial Spirit and Mind Power.
From there, it reached the standard of [Power of Miracles].
It could allow a Body Refiner to achieve Blood Rebirth, an extraordinarily powerful Undying Nature whose essence did not change. It was vastly different from Wang Yu's pseudo-immortality back then; at the time, he had almost been completely worn away by