The grotto had an enormous number of passages.
They crisscrossed in every direction, forming an exceedingly complex maze.
People had once been trapped alive inside, unable to find a way out.
Fortunately, after several thousand years, most of it had been explored.
Though incomparably complex, it had nine main arteries. As long as one could locate those nine major routes, one could follow them to find an exit and leave.
Hearing that, one might imagine the grotto to be narrow, confined, and oppressive.
In reality, however, that was not the case.
The space inside was vast, and the overwhelming majority of the passages were extremely large.
For instance, Li Su casually entered one passage. After advancing less than a thousand meters, his view suddenly opened up. It was ten meters high and more than five meters wide.
Passages like this were not considered large within the grotto.
The truly largest ones were the nine main arteries. Their diameters could exceed ten thousand li, practically no different from a small world.
If Immortal-Fall Grotto had any issue, it was that its laws, principles, and Dao patterns were denser and more solid. Although extraordinary matter was plentiful, it was exceedingly difficult to stir.
Given Li Su's circumstances, once his reach extended beyond a thousand meters, his divine abilities weakened drastically.
He was a Yang Soul cultivator, and one in the transcendent peerless category at that. Under normal circumstances, a blast of his mana could easily fly a thousand li and cleave through great mountains.
That alone showed just how severely he was being suppressed. The density of this world's laws was simply too high!
Of course, while his range had been greatly reduced, his destructive power had not.
Li Su reached out and could not help touching the wall of the passage.