In an instant, Sikong Jing understood.
"The sixth layer of the Nine Heavens Restriction truly pushes the trial's difficulty to the limit. I must constantly switch back and forth between the Nine Heavens Sword Dao and the cultivation and trials of its magic beasts..."
"Only through continual switching can the experiment achieve stronger results."
Do not forget: the nine layers of restrictions set by the Nine Heavens Emperor existed to use demons against demons, allowing the magic beasts undergoing the trials to keep gaining the ability to slay demons after continuously fusing with Nine Heavens Demon Blood.
Slaying demons through Sword Dao...
And using the Demon Blood fused into their own bodies to deepen their understanding of the Nine Heavens Sword Dao.
The Nine Heavens Emperor's goal was to forge a magic beast that had mastered the Nine Heavens Demon-Slaying Sword Dao—a conscious magic beast capable of slaying its own demons—so that one day, it could surpass the Nine Heavens Emperor and the Nine Heavens Magic Beast.
Then help the latter slay its demons and return to its normal state.
Thus, the experiment she devised was naturally extreme beyond all extremes.
The Magic Rat body had smoothly completed the fourth and fifth layers in just two or three months, but that had merely been adaptation.
It was only a small appetizer. The sixth layer was where the real beginning lay.
Countless powerful magic beasts had fallen here back then.
In the sixth layer, no one knew how many cycles of inheritance and Demon Blood fusion were needed before the subject could undergo mad breakthroughs.
With that, Sikong Jing put away his complacency and continued comprehending the Nine Heavens Sword Dao within the illusionary scenes.
Half a year later... Bang!
The second signal pearl from Su Yuexi shattered. Sikong Jing opened