"This method may be worth a try."
Chen Nianzhi pondered briefly, then calculated with his fingers. After a moment, he said, "Using one strand of Primordial Purple Qi as a guide, supplemented by a strand of Open Heaven Qi, should be enough to advance a single Open Heaven spirit root."
At this, everyone felt a faint surge of joy.
If Primordial Purple Qi alone were used to advance an Open Heaven spirit root, advancing one would require roughly forty-nine hundred years of accumulation.
But with Open Heaven Qi as a supplement, only one strand of Primordial Purple Qi was needed, something that could be accumulated in merely ten years. The difficulty was greatly reduced.
Seeing this, Qing Ji took out the strand of Open Heaven Qi in her possession and said, "This time, I have one extra strand of Open Heaven Qi. Together with the six strands you have accumulated before, we should be able to advance seven spirit roots."
Chen Nianzhi nodded and said with a smile, "After this great calamity, quite a few Earth Immortals who opened the heavens will emerge. We can purchase some Open Heaven Qi when the time is right."
With a substitute for Primordial Purple Qi, Chen Nianzhi immediately felt much better.
Although Open Heaven Qi was also extraordinarily expensive, it could at least be bought. Using it to cultivate Open Heaven spirit roots was certainly a worthwhile trade.
With that thought, Chen Nianzhi immediately went to Qingyuan Mountain and used Primordial Purple Qi supplemented by Open Heaven Qi to cultivate the Immortal Peach Tree, the Enlightenment Tea Tree, and the Eight Trigrams Treasure Tree.
These spirit roots were all supreme treasures for cultivation. Among them, the Immortal Peach Tree could increase an immortal's cultivation speed, while the Enlightenment Tea Tree could allow immortals