The Mysterious Yin Scripture had belonged to Venerable Xuan Gu of the Chaotic Star Sea and was later obtained by his disciples, Ji Yin Patriarch and Ji Xuan.
Ji Xuan had fled to Tian Nan through the Ancient Teleportation Array with part of the Mysterious Yin Scripture and the Blood Jade Spider.
Naruto had already obtained his remains, the Ancient Teleportation Array, and the Blood Jade Spider!
Now, Naruto had obtained part of the Mysterious Yin Scripture as well!
The Jade Slip also contained several bizarre secret arts.
Not only did it resolve some questions that had long baffled him, it also explained the true purpose of the Blood-Congealing Five-Element Pill.
Naruto settled his mind and read carefully, bringing his hazy memories into focus.
The Blood-Congealing Five-Element Pill was something akin to a demonic beast's inner core, which only cultivators who practiced the Fiend Demon Art could condense within their bodies.
This was also the primary purpose for which the Fiend Demon Art had been created.
The Four Blood Attendants could transform into fiend demons and enter the Foundation Establishment Stage without taking Foundation Establishment Pills precisely because they had formed these pills.
However, according to the description of the Fiend Demon Art, even without using blood sacrifice, anyone who practiced this cultivation technique could forget about achieving core formation in their lifetime because of its rapid-progress nature.
The Foundation Establishment Stage was the highest level their cultivation technique could reach.
In fact, not only the Fiend Demon Art, but several other cultivation techniques were much the same, almost all sharing the fatal flaw of making core formation impossible.
In exchange, their cultivation progressed at a naturally jaw-dropping rate, especially with the aid of blood sacrifice.
The Blood-Congealing Five-Element Pill seemed to exist precisely to compensate for the shortcomings of