Just like the Nine Serenities Art, the higher the level of cultivation, the purer and stronger the consciousness of hell would be. Moreover, it could form eighteen levels of hell in the Niwan Palace, similar to the Nine Serenities.
One level, one world, one level, one tempering!
All the spiritual power that entered Zhu Wuwan's Niwan Palace had to go through the tempering and hammering of layers of hell before finally settling in the depths of the layers of hell, adding various effects.
Therefore, the Eighteen Hell Codex could also effectively use the Heavenly Devil Remnant Thought in the Demonic Will Pagoda. Even a low-level Heavenly Devil Remnant Thought would be tempered by the Eighteen Hell Codex to a point where it would be useful to Zhu Wuwan.
The essence could be extracted from the residue. This was the Eighteen Hell Scripture, and its power was even stronger than the Nine Nether Art.
