In essence, the Ancient Pipeline was also a form of post-mortem Nen.
It embodied the powerful will of ancient humans, an ultimate expression of the instincts to reproduce and survive.
Thus, the Ancient Pipeline had something in common with the Kakin Empire's "Seed Urn": both carried a will that demanded continuation through generation after generation.
In theory, then, as long as no external forces interfered, the Ancient Pipeline and the Seed Urn could endure forever.
But certain conditions had to be met before they could activate their abilities.
Take the Ancient Pipeline before Moyu, which led to the Six Continents. After each use, it entered a relatively lengthy cooldown period.
According to Don Freecss, activating the Ancient Pipeline did not draw on the user's aura. Instead, it consumed energy the pipeline itself had accumulated.
Clearly, this ability embodied an exceptionally pure spirit of devotion and sacrifice.
If there was a least dangerous form of post-mortem Nen in the world, it had to be the Ancient Pipeline, which benefited future generations of humanity.
For that very reason, once the Ancient Pipeline was overused, the post-mortem Nen that formed it needed time to build up its energy again.
Before arriving, Moyu had worried that the Ancient Pipeline might not have enough energy to activate.
Now, it seemed he had worried needlessly.
After all, this was a little-known Ancient Pipeline lost to the currents of history. It could hardly have seen frequent use, so its energy reserves were naturally no cause for concern.
Moyu checked the Ancient Pipeline's condition.
There were no problems.
A faint smile appeared on Moyu's face as he turned to his companions. "We can go back."
They exchanged glances, an indescribable sense of relief welling up within them.
The environments of the Dark Continent were truly harsh for humans.