Thereafter, Chen Nianzhi continued to nurture it for several thousand years, refining it day and night with Pure Yang Fire. Only now had he tempered away ninety percent of the impurities within.
Using Five Elements essence was entirely different. Five Elements essence was the Five Elements qi that cultivators stripped from Five Elements spiritual qi during cultivation.
This kind of Five Elements qi was the purest essence qi between heaven and earth. Lihuo, Geng Metal, Wu Earth, and every other kind of essence were separated apart, leaving no possibility of intermingling.
When magic treasures were refined with such Five Elements essence, impurities were almost impossible to exist.
Such treasures were crystal-clear and flawless. When infused with immortal essence of the same attribute, they encountered no obstruction, allowing them to unleash their greatest power as naturally as moving one's own arm.
Yet even so, Five Elements essence was only mortal-world qi. It lacked the crucial substances of the immortal path, and was still insufficient for refining immortal treasures.
Thus, the ancients devised a method: first gather Five Elements essence, then blend into it the pure immortal qi cultivated by oneself, causing it to transform into Five Elements immortal qi.
The Five Elements essence Chen Nianzhi had acquired from Qian Xuande was in fact Five Elements immortal qi that had already been refined with immortal qi. It could be used directly to refine natal immortal treasures.
"Let us begin the refinement."
Returning to the matter at hand, Chen Nianzhi looked at the Five Elements immortal qi within the Dragon-Pattern Blackgold Cauldron, and his heart settled slightly.
He took out the Blazing Fire Return-to-Ruins Sword and immediately activated the Dragon-Pattern Blackgold Cauldron's power, beginning to have the immortal sword continuously refine the Five Elements immortal qi.
Like a whale swallowing vast seas, the