Netherworld Divine Stone.
Even though it was forged into a divine sword, its essence remains the Netherworld Divine Stone, as the cultivator who crafted this sword could not completely refine it.
Now, Chen Yuan is trying to use his Immortal Demon Power and Blood Sea Power to reforge this divine sword back into the Netherworld Divine Stone.
Within it, there are traces of Yuan Qi that, in essence, should only exist within the Netherworld. It is the supreme Qi of the Netherworld, extremely rare and precious.
If it were ordinary Netherworld Profound Crystals, they would at least be saint-level treasures, but generally, no one uses them to refine artifacts. After all, the Netherworld has vanished for millions of years. These Netherworld Profound Crystals, leftover in the human realm, are extremely rare, and even the Immortal Sects use them to craft Immortal Elixirs or keep them for the ancestors of the sect.
