Xuanling Demon Map.
One of the Immortal Laws of Zuxian Sect.
It is the strongest cultivation technique from the Golden Core Stage to the Reverse Nascent Soul Realm.
After cultivating this technique, Chen Yuan realized from it.
The last cultivator of this technique was the infamous Purgatory Demon God in the Three Thousand Interfaces.
Chen Yuan had once read about some of the deeds of the Purgatory Demon God in ancient books.
Legend has it that this Purgatory Demon God was not human, but came from the mysterious Netherworld.
It is said that in the beginning, the Purgatory Demon God was unknown and unnoticed in the Human Race's Immortal Cultivation World.
But after reaching the Golden Core Stage, the Purgatory Demon God rose to power and once became the top talent across many interfaces, dominating the heavens and myriad worlds.
There are even rumors that he once killed a Nascent Soul Lord while still at the Golden Core Realm.
