He Huan had once heard Qin Fengming say that the bodies of Nether Soul Ghostly Creatures in the Nether Soul Mountain Range could give birth to a kind of crystal stone, an energy supplement crystal even more precious than top-grade Yin Stones.
That was the Nether Soul Crystal Stone, an energy crystal comparable to top-grade Yin Stones. In terms of value, however, Nether Soul Crystal Stones far surpassed top-grade Yin Stones.
The Yin energy within Nether Soul Crystal Stones was incomparably pure, with hardly a trace of impurity. Although the purity of top-grade Yin Stones was extremely high, they still could not compare. Cultivators did not need to circulate their cultivation arts to refine Nether Soul Crystal Stones; they could rapidly replenish the magic power within their bodies without worrying about any adverse effects.
During fierce battles or when facing the Heavenly Tribulation, Ghost Dao cultivators who absorbed the energy of Nether Soul Crystal Stones could recover their magic power far more rapidly than with top-grade Yin Stones.
Looking at the crystal stone in his palm, He Huan was overjoyed.
The bodies of the Nether Soul Ghostly Creatures here were completely different from those he and Qin Fengming had encountered upon first entering the Nether Soul Mountain Range.
The ghostly creatures Qin Fengming had encountered earlier had bodies formed from Yin energy, with the Nether Soul origin as their core. A powerful strike could scatter them.
The ghostly creatures here, however, though still lacking physical bodies, had clearly advanced far beyond energy bodies. They were no longer bodies condensed from energy and would not collapse so easily under a slash.
He Huan had his doubts, but he did not investigate further. In his view, the mutations in the bodies of the Nether Soul Ghostly Creatures should be related to their