Bang——

With a few clumps of dirt scattering, Si Boyun's body heavily hit the ground.

Due to his protective Spiritual Energy inexplicably disappearing during flight, he was left with some mud on his face and hair after the fall.

He no longer looked like the transcendent figure of a Nascent Soul expert.

However, Si Boyun clearly understood the situation he was in; only a fool would worry about their hairstyle at a time like this.

Thus, he simply brushed his disheveled hair back, and upon standing up, immediately released his divine sense.

But he quickly realized that he didn't need his divine sense to fully see the environment he was in.

Because this place....

was too small.

It was a clearing of about a hundred square meters, with a height of less than four meters.

The ground was soft and moist, appearing very damp.

At this moment.

The hole that had sucked him in had long disappeared, leaving only a straight path leading forward, stretching into unseen depths.

Seeing this, Si Boyun took a deep breath and quickly made a decision in his heart.

But just as he was about to move forward, he suddenly felt a sudden heat in his chest.

He quickly reached in and took out an item, raising an eyebrow:

"Is this... Old Monster Duan's map?"

It had been mentioned before.

At the Nascent Soul Realm, one's mind can think several dozen times faster than that of a regular person in a second.

So he quickly figured out a few things:

"Could it be that besides navigation, this map can also serve as a beacon to activate the underground cave?

The cave sensed the map's presence and thus sucked me into this place?"

Thinking of this.

A subtle expression appeared on Si Boyun's face.

If the cave had indeed activated an array to draw him in due to the map,

then this process, though far from pleasant, was much better than the worst-case scenario he had imagined.

At least it was nowhere near a certain death situation.

Si Boyun hesitated for a moment, holding the still warm map in one hand, and tightly gripping the Ascension Manual in the other.

A moment later.

Words 'Agility' and 'Control' sequentially appeared and merged into his body.

Having completed his initial preparations, Si Boyun no longer hesitated and boldly stepped into the passage.

Unlike the prior clearing, the passage seemed much narrower:

The entire passage was less than two meters high and about two and a half meters wide, making it easy to scrape one's headpiece.

After walking a distance along the passage, Si Boyun suddenly let out a light 'eh', as if he had discovered something.

Then he stopped and looked to his right.

In front of him to the right, a somewhat rusty bronze ancient lamp was hanging on the rock wall.

This bronze lamp was about the size of a basin, with a thick layer of dust on it.

It was clear.

The lamp had not been used for a very long time.

Considering that the last time Old Monster Duan came to these ruins was over forty years ago, Si Boyun deliberately observed both with his naked eyes and divine sense, confirming that the dust seemed to have settled for far longer than just a few decades.

Since even Old Monster Duan hadn't touched the bronze lamp, Si Boyun naturally wouldn't mess with it either.

He instinctively withdrew his gaze and prepared to continue forward.

But just as he was about to shift his gaze back to the main path,

the corner of his eye suddenly caught a bulge beneath the dust.

The bulge was about the size of half a fist, irregular in shape.

It looked like the corner of a polyhedron.

Though the dust obscured his view, Si Boyun couldn't clearly see what was inside.

But since lamps in different places all have a similar style, with a wick and lamp oil inside,

theoretically speaking, such a bulge shouldn't normally occur.

So Si Boyun thought for a moment and cast a spell towards the lamp's wick.

As a gentle breeze swept by, the dust was quickly blown away.

The item beneath the dust also revealed its original appearance.

Si Boyun looked over.

The next moment.

He was suddenly stunned.

At the center of the lamp, a black, irregular crystal was placed.

The black crystal had no remnants of Spiritual Energy, clearly having long been an empty shell.

However, as a cultivator, Si Boyun recognized its origin almost instantly:

Celestial Demon Crystal!

It is well-known.

Once a demonic beast reaches the third tier, its brain core condenses a crystal composed of highly concentrated Spiritual Energy and other substances.

The rabbits had recently acquired quite a few demon cores.

The size and value of a demonic core fluctuate based on the beast's tier.

Most circulating on the market are third-tier early-stage demon cores, while mid to late-tier ones are relatively rare,

since not many cultivators possess the ability to slay mid to late-tier demonic beasts.

A demon core corresponds to a cultivator's Golden Core, and when a demonic beast advances to a Tier Four Demon King, its demon core undergoes further transformation, similar to the Nascent Soul formation process in cultivators.

This transformation product is known as a Celestial Demon Crystal.

Given that demonic beasts of the same tier are slightly stronger in combat than cultivators, it requires at least two minor ranks above to ensure a sure kill on a demonic beast.

Thus, even a Tier Four early-stage Celestial Demon Crystal is not something every Nascent Soul Realm cultivator can possess.

This resource is as core and strategic as they get, mainly used to power large-scale arrays.

According to Si Boyun.

Currently, all the Celestial Demon Crystals combined in the core vault of the demon gate number between forty and fifty.

Who would have thought he would find an abandoned Celestial Demon Crystal in the ruins?

However, something seemed odd....

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