Watching his father charge out, Sikong Jing took another deep breath and heavily stepped forward once more.
The frenzied power of Extreme Prison tempering all around him surged incessantly into Sikong Jing's body.
All kinds of power blazed wildly throughout his body as Sikong Jing murmured to himself...
"Not enough, still not enough..."
"Neither the Spirit Prison Heavenly Cage nor the Feather Prison Sword Cage—these two Extreme Prison cultivation methods are powerful enough."
"These two Extreme Prison cultivation methods cannot allow my Nine Heavens and Sword Extinction Imperial Bloodlines to truly unleash their greatest might."
Those were Sikong Jing's realizations over the past three days...
Over these three days, he had finally begun truly cultivating the things of the Extreme Prison Stage. After the first day, he had sensed that both Extreme Prison cultivation methods were not strong enough. Put plainly, they could not truly give all the meridians and dantian in his body the optimal tempering.
In fact, they fell far short...
He needed his body to erupt to a greater extent. With every step he took, he needed to achieve the best possible tempering effect. But the cultivation methods were not powerful enough—what was he supposed to do?
He could comprehend it himself, of course, but time would not allow it.
"How did the Sword Extinction Emperor and the Nine Heavens Emperor forge their Extreme Prisons?" Sikong Jing pondered silently.
Within the Sword Extinction Emperor's inheritance, there was no method for forging an Extreme Prison—only the Extreme Prison Sword from the Sword Extinction Twelve Chapters. Likewise, there was none in the inheritance the Nine Heavens Emperor had given his father.
It was as though they had simply skipped over this realm.
"No, they definitely did not skip it. Otherwise, the Sword Extinction Emperor and the Nine Heavens Emperor