The reason for this speculation is that there are indeed too many similarities between the two.
Lu Ye guesses that there’s likely some sort of connection between these two rivers.
Perhaps, following this river might directly lead to some part of the Northern Black Tide Forbidden Land, who can say!
Retracting his gaze from the dark river water, Lu Ye looks toward other places around the riverbank.
Suddenly, not far from the left side of the riverbank, Lu Ye indeed notices some commotion.
There, part of the passageway has clearly collapsed, judging from the fallen soil and rubble, the collapse doesn’t seem to have happened too long ago.
"Traces of an array?"
With his expertise as an Array Master, Lu Ye swiftly notices a slight anomaly, instantly rushing towards that passageway by the riverbank.
"Sure enough, could this array be the previous seal that restrained those Yin Souls in the sand land?"
Lu Ye discovers that this array is indeed a type of sealing array.
However, right now, some array patterns have already been damaged.
After inspecting it briefly, Lu Ye finds that, in fact, this array’s energy source is also running low.
"But where exactly do these Yin Souls come from?"
Lu Ye ponders this point, as the origin of the Yin Souls surely should reside somewhere.
They can’t just appear out of nowhere.
While examining this very advanced array, Lu Ye suddenly realizes...
"Why do I feel like it also has a teleportation function?"
The array is quite intricate, initially, Lu Ye thought it was just a sealing array, but after further understanding, it seems that’s not all.
It actually carries a teleportation function as well.
However, Lu Ye doesn’t know where the destination of this teleportation array is.
At this moment, in the pitch-black river, separated by some distance, Lu Ye senses a few Yin Souls bursting out from it!
"Did the Yin Souls start gathering here?"
Instantly exterminating these newly formed Yin Souls, Lu Ye considers for a moment and prepares to start repairing this sealing array so it can function again.
But right now, his proficiency in the Array Dao is somewhat lacking.
He can only fully immerse himself in the Array Dao during this time, using the Hundredfold Amplification to elevate his Array Dao skills as much as possible.
Afterward, the chance of successfully repairing the sealing array will be greater.
"I need to undergo a retreat for a while, this array should be controlling the sealing power of the Yin Souls sprouting from this underground dark river. Now that it’s damaged, I need to see if I can repair some of it."
A moment later, Lu Ye said to Qing Yu beside him: "As for the Yin Souls emerging from the river, handle the situation as you see fit. If you can manage, feel free to exterminate them."
Hearing this, Qing Yu immediately nodded, and the next moment, the Thunder Beast, which had been stowed in the Beast Taming Pouch since they left Mist Heaven Hall, was released by her.
"Young Master, you go into retreat, leave this place to me."
The Yin Souls freshly spawned from the river, most of them wouldn’t be too strong at first.
So, Qing Yu still had a certain degree of confidence.
Moreover, the Thunder Beast earned its name due to its Talent Power associated with thunder.
Previously, when Lu Ye used the Thunder Power to destroy these Yin Souls, Qing Yu had observed this closely.
Now letting the Thunder Beast deal with these newly born Yin Souls shouldn’t pose too much of an issue.
Knowing that Qing Yu’s Spirit Beast also had a Thunder Attribute, Lu Ye nodded and then set up a barrier around himself to prevent outside disturbances.
The next moment, a mysterious aura flashed momentarily around Lu Ye, and he immersed himself entirely in inscribing array patterns and delving into the Array Dao.
Qing Yu glanced twice, then quickly looked away to avoid inadvertently releasing the newly birthed Yin Souls.
The subsequent time was spent with Qing Yu handling these newly animated Yin Souls while Lu Ye was striving towards the breakthrough to a Tier Four Array Master.
Time trickled by bit by bit...
With Qing Yu blocking the source here, the number of Yin Souls reaching up to the Demon Burial Sand Land drastically decreased.
Two days passed, and the two Mortal Realm Grandmasters guarding the outskirts of the Demon Burial Plain discovered...
"Do you feel that the number of Yin Souls reaching the perimeter has noticeably decreased?" Yu You asked.
Zhao Guang scanned the surroundings and nodded: "It sure seems that way. Although Elder Chen cleared some out before, it shouldn’t have dwindled this much."
Saying this, the two exchanged a glance, both of them harboring a certain speculation.
Could it be that Chen Beixuan, who entered the Burial Demon Sand Land, has begun taking action in the past two days?
If so, wouldn’t it mean that the crisis in the Burial Demon Sand Land is genuinely starting to show signs of improvement?
"Elder Chen truly deserves his reputation as a prodigy capable of rivaling the Earth Realm. It seems that even the Burial Demon Sand Land isn’t too perilous for him," Yu You sighed.
They had been alive for over a century, barely reaching the Mortal Realm, and not even reaching its late stage.
Yet others could ascend to the Earth Realm at such an age.
Due to the events inside Mist Heaven Hall, they, the outsiders, were temporarily unaware.
Therefore, they didn’t know that Lu Ye was now fully able to effortlessly overwhelm the early Celestial Realm.
...
In the blink of an eye, three days swiftly passed.
Ever since Lu Ye spoke with Qing Yu three days ago, he hadn’t said another word.
And his understanding of the Array Dao had rapidly increased during these few days.
Qing Yu, on the other hand, had transformed into an emotionless Yin Soul extermination machine, she could no longer recall how many newborn Yin Souls she’d slain in these days.
Regardless, it was at least in the hundreds.
At this moment, a few more Yin Souls emerged from the river, attempting to rush outward.
Upon seeing this, before Qing Yu could act, the Thunder Beast had already opened its mouth...
In an instant, a succession of lightning bolts, albeit not as thick as when Lu Ye used the Thunder Pearl, shot out like streaks of lightning...
How could those newly born Yin Souls possibly withstand such an attack?
They were instantly reduced to ashes, leaving only a few freshly formed Crystal Cores floating.
Imitating Lu Ye, Qing Yu collected the Crystal Cores, planning to hand them over to the young master later, and looked again towards him.
She could see what was happening around Lu Ye since the barrier was only for soundproofing and warding off disturbances.
Her vision wasn’t obstructed.
But she knew nothing about the Array Dao, only witnessing him inscribing something these past few days.
And as he inscribed, a peculiar sealing power gradually began to envelop the space.
"Is this... about to succeed?"
With this, Qing Yu also felt a bit of delight, even though most of the newly born Yin Souls here were easy to handle.
Yet nobody would willingly keep repeating such tasks indefinitely.