They understood that the treasure needed to promote the ancient tree into an Innate Supreme Treasure would surely be incomparably precious. They immediately cupped their hands and departed.
Only after everyone had left did Chen Nianzhi remain behind alone.
This Great Wilderness Ancient Tree was merely a low-grade Innate Spirit Root, and its promotion would require a long time.
Chen Nianzhi first took out the Heaven-and-Earth Primordial Qi Bottle and began using the Primordial Undying Spiritual Light to hasten the maturation of the Great Wilderness Ancient Tree.
After expending more than twenty strands of Primordial Undying Spiritual Light in succession, the Great Wilderness Ancient Tree advanced into a twenty-four-pattern, supreme-grade Innate Spirit Root.
Yet upon reaching this stage, the Heaven-and-Earth Primordial Qi Bottle's ripening effect had already failed.
"Looks like I'll have to promote the Heaven-and-Earth Primordial Qi Bottle into an Innate Supreme Treasure as well."
As Chen Nianzhi spoke, he began drawing in Primordial Source Qi and merging it into the Heaven-and-Earth Primordial Qi Bottle to promote this treasure.
With Chen Nianzhi's current cultivation, he could refine one strand of Primordial Source Qi in roughly two calamity cycles.
Over the years, Chen Nianzhi had already refined more than a dozen strands of Primordial Source Qi.
At this moment, Chen Nianzhi continuously infused eight strands of Primordial Source Qi into the Heaven-and-Earth Primordial Qi Bottle, finally promoting it into an Innate Supreme Treasure.
"Success!"
Seeing the Heaven-and-Earth Primordial Qi Bottle complete its promotion, Chen Nianzhi could not help but smile faintly.
After its promotion, the Heaven-and-Earth Primordial Qi Bottle still possessed no offensive or defensive power.
However, its ripening effect had increased enormously. It could now hasten the growth of spirit roots at the Innate Supreme Treasure level and could even be used to promote supreme-grade Innate Spirit Roots.
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