Li Su stood where he was, somewhat excited.
The underworld's sheer extravagance let him see hope—the hope of bringing the Nine-Nine Profound Art to completion.
This cultivation art was truly a bit of a scam. Setting aside how difficult it became the further one progressed, the resources it required were downright terrifying.
Just a mere million-ton level could consume all his remaining resources. And above that were ten million, a hundred million, a billion—it was so high there was no end in sight, so lofty it could not be reached.
This cultivation art was extremely important to Li Su. The later one reached, the greater the enhancement it granted the physical body.
Although the stone stele did not describe the ultimate state of the Nine-Nine Profound Art, since it was a Saint-level cultivation art, by the end one would at the very least reach a state of being indestructible through myriad calamities.
To say nothing else, just look at that section of Saint Pangu's intestine. How many epochs had it been? Yet it was still sitting there.
Since the underworld was this extravagant, it naturally could not lack such resources. While he still had time before perfecting his own realm, he could raise the Nine-Nine Profound Art as well.
As for the ninth layer of Nine-Nine, that need not be mentioned.
But Eight-Nine had to be brought to great completion no matter what.
If he succeeded in cultivating it, Li Su had a premonition that he could likely use his physical body to directly contend with a supreme treasure. Not that he could withstand it completely, but even if a supreme treasure blasted his body apart, he would at least be able to endure it for a long time.
Besides the Nine-Nine Profound Art, those Yin characters also held great