Thirty thousand years to one hundred thousand years.

The moment he heard this answer, Shen Yu thought of many things.

However, according to current research, the Extraordinary Level of a Parallel World is fixed and does not change too drastically over time.

Therefore, the speculation that this world possessed a higher Extraordinary Level in ancient times is rather unlikely.

"You all remain here and carry out foundational research," Shen Yu instructed the others, then looked at Martial Artist Shen Yu. "Let's go inside and take a look."

"Alright." Martial Artist Shen Yu was quite interested as well.

His world had basically become uneventful now.

It had entered a kind of positive cycle.

Even if he could obtain Gray Mist through doing jobs, his progress could never compare to that of the other Shen Yus.

So usually, Martial Artist Shen Yu spent his time researching Martial Arts alone or helping out at the places of the other Shen Yus.

After all, the abilities acquired by each Shen Yu were interconnected.

Martial Artist Shen Yu was not only a Martial Arts Master, but could also be a powerful Magic User or a Great Cultivator.

No matter which world he went to, there was always a vital role for him to play.

Plus, with the existence of the Gray Mist, there was basically no need to worry about danger.

Thus, compared to staying in his own world, Martial Artist Shen Yu preferred to go help out in other worlds—in fact, in the Interstellar Civilization World, he even requested a spaceship, and would venture to unexplored places during his free time, leaving behind Gray Mist coordinates.

Right now, the two Shen Yus approached the depths of the canyon directly.

They used all kinds of methods to conceal themselves.

But after getting close enough, they discovered rather unexpected traces of human activity.

"There are people here, and not just a few," Shen Yu was surprised at first, but when they actually met these people, things became clear.

It was an old man with a white beard.

His Martial Arts Power clearly had reached the Martial Arts Myth level, which was just before the Martial Immortal Level.

Even if he went to the world of the previous Martial Artist Shen Yu, he would still be number one in that era.

And now, such a Martial Arts Master, one whom all forces would treat with utmost respect, was standing in the middle of a medicinal field, carefully examining the herbs planted there.

Meanwhile, Shen Yu and Martial Artist Shen Yu's Divine Sense kept spreading out.

They found that there was more than one old man like this.

The entire canyon had at least dozens.

All of them were strong at the Martial Arts Myth Level.

Aside from them, there were also hundreds who seemed to be servants, yet each was also a rarely seen Martial Arts Master.

"These people must have detected the trace of particularly high-quality Primordial Energy contained in this canyon," Martial Artist Shen Yu said. "This kind of Primordial Energy originates here, and its concentration is much higher than outside. If one were to cultivate here, it would be much easier than outside, and there's even a slight chance to achieve a breakthrough."

Martial Artist Shen Yu's words were filled with obvious excitement.

He had already deduced Martial Arts to the Martial Immortal Level.

That meant he could break through the limitations of life and attain immortality.

And now, if there were Martial Arts Masters here at the same level, how could he not look forward to that?

Even if there were only one or two, they could still trade and confirm their insights.

And at that moment, Shen Yu also detected the strongest presence at the very depths.

Not only that, he even found the most important thing hidden in this canyon.

—A sword!

A broken sword, only half remaining.

It was stabbed upright in the canyon, surrounded by a thick aura of killing intent. Even the two Martial Arts Masters who had reached the Martial Immortal Level could not approach it at all.

Because this sword was a Magical Treasure at the True Immortal Level!

Don't be fooled by how Cultivator Shen Yu seemed to deal with the six True Immortals fairly easily; in fact, he expended large amounts of Gray Mist and mobilized the power of the entire world.

If not for that, a True Immortal was a level far beyond what the current Shen Yu could reach.

Yet in a world where the highest is only a Martial Arts Myth, there actually exists a Magical Treasure at the True Immortal Level!

But Shen Yu could see clearly that, despite the True Immortal Treasure Sword still radiating powerful energy, it was already at the edge of exhaustion.

The fact that even two Martial Immortals could get so close made that obvious enough.

This situation was not caused by time.

For Magical Treasures at the True Immortal Level, time does not leave any mark.

It's simply that the sword itself had already been completely destroyed.

Its light was faded; its True Spirit had perished.

At this point, it's obvious what happened in this world.

"So, tens of thousands of years ago, a broken sword like this arrived in this world," Shen Yu mused. "A Treasure Sword of this level most likely comes from another Parallel Universe."

This is undoubtedly an astonishing discovery.

At the very least, it proves that in this Multi-Parallel Universe World, there exists an Extraordinary System that reaches the True Immortal Level!

And, considering the "history" and "destiny" relationships in this Multi-Parallel Universe World, perhaps even more can be gleaned from this Treasure Sword.

For example, which era was it from, or even which myth!

"Let's go." Shen Yu and Martial Artist Shen Yu said.

Their figures paused just for a moment, and they appeared next to the two Martial Immortals.

And revealed themselves.

Of these two, one was a black-haired old man, while the other looked like a seventeen or eighteen-year-old girl.

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