Lu Changsheng did not continue "dissolving" the rocks ahead. Instead, he shrank the light screen of the Mysterious Yellow Shield to its utmost, letting it cling just three inches from their bodies.
Through the final transparent layer of rock, less than a hundred yards ahead, the master and disciple finally saw the culprit behind Lu Ping'an's agitated spiritual senses.
At the end of that rock layer,
there was a miniature hollow cavern, no more than a hundred yards across, formed entirely by the natural workings of heaven and earth.
Its four walls were covered in intricate, profound innate array patterns that glowed with a deep blue light.
This natural innate array had perfectly sealed away the cavern's inner aura. Not even the Earth Sha Turbid Qi could penetrate it in the slightest.
At the very center of the cavern
lay a tiny pool, less than three yards across.
The water was an utterly profound black. Not a ripple disturbed its surface, which was as still as an ancient black mirror.
But if one sensed it closely, one could detect that the black pool contained a terrifying source of water, one potent enough to freeze a primordial spirit, yet also pregnant with the mother of all things.
"Innate Essence of Gui Water!"
Lu Changsheng recognized the pool's origins at a glance and drew in a sharp breath.
This kind of divine treasure had formed from the purest source of water at the birth of heaven and earth.
Even a single drop, if it fell into the mortal world, could instantly become a vast ocean.
More terrifying still was the power of extreme cold it contained. Even a Primordial Unity Golden Immortal who came into contact with the slightest trace of it unprepared would have his primordial spirit frozen to powder in