These two beads were indeed anything but ordinary. Even with Wang Daoyuan's divine sense, he had failed to detect the slightest spiritual power fluctuation.
The spiritual qi drifting through the air was directly absorbed the moment it came into contact with the two beads.
Afterward, a small amount of Pure Yin and Pure Yang Qi would be released.
This greatly astonished Wang Daoyuan. He possessed more than one treasure capable of producing Pure Yin and Pure Yang Qi.
Yet whether it was the four-restriction black stone or the two kinds of spirit flames, neither could possibly achieve such a high conversion efficiency.
Moreover, for the four-restriction black stone to produce Pure Yin and Pure Yang Qi, it needed a sophisticated Spirit Gathering Formation to sustain it.
If it were placed directly near a spirit vein, the spiritual qi it produced would be minuscule, virtually nonexistent.
Yet these two beads were currently producing Yin Yang Energy even faster than the four-restriction black stone did within a Spirit Gathering Formation.
Of course, this item was not particularly useful to Wang Daoyuan.
He had Crimson Sun True Fire and Gui Water Nether Flame, and with the time flow within the Spirit Pearl Space, he simply could not use up all the Pure Yin and Pure Yang Qi.
But even things that were neither here nor there to him could not be left for others.
Pure Yin and Pure Yang Qi remained the most important strategic resource in the Seven Stars Sea Cultivation World.
With it, one could buy the loyalty of a great many talented people.
If it fell into someone else's hands, they could use it to gather a vast number of followers and cultivate a large number of Spirit Transformation cultivators.
Now that it had fallen into his hands, he could