With no way out, the mother and daughter were trapped underground.

Although her Cultivation was suppressed, her Divine Sense was still at the Realm of Late Core Formation Stage Perfection.

Therefore, whether Lin Yuan was lying, she knew with a single thought.

"Since that is the case, let us depart."

Yue Qingyao waved her hand, and a Flying Boat entirely carved from white jade appeared out of thin air, emitting a soft halo.

Before boarding the Flying Boat, she glanced coldly at Lin Yuan, her voice devoid of any emotion.

"Follow honestly, and do not harbor any improper thoughts."

"Although my Cultivation is suppressed to the Ninth Layer of Qi Refining, the methods of a Late Core Formation Stage Cultivator can kill you in a single thought."

She did not even bother to plant a Restriction on Lin Yuan.

This confidence stemmed from the crushing superiority brought by absolute strength.

The gap between Late Core Formation Stage Perfection and the Ninth Layer of Qi Refining could truly be described as the difference between heaven and earth.

The White Jade Flying Boat tore through the air, moving incredibly fast.

Yue Qingyao stood at the bow, her phoenix eyes slightly furrowed, vigilantly scanning the surroundings.

"Mother, we shouldn't run into those Demonic Worms again this time, right?"

Su Qinghan's voice still carried a hint of lingering fear.

"The suppression of Divine Sense here is severe. I have already reduced the Flying Boat's speed by seventy percent, so we shouldn't run into them head-on, but our destination seems to be infested by these worms."

"Ah, what should we do?"

"The Demonic Worms there should be in a deep slumber, so there should be no danger."

The Flying Boat traveled without incident for more than ten days, continuously traversing the peril-ridden Demon Falling Valley.

Lin Yuan maintained a calm exterior, but was secretly astonished in his heart.

He discovered that the route Yue Qingyao took, although differing in details from the schematic Qing Tan gave him, was surprisingly consistent in its general direction.

Along the way, he took advantage of the intervals when Yue Qingyao was scouting dangerous areas or collecting specific Spiritual Plants.

Relying on Qing Tan's Route Map and Lan Caier's map, he silently gathered a stalk of Purple Apex Ape Heart Grass, as well as many other precious Spirit Plants.

Of the three main Materials required to refine the foundation establishment pill, he now possessed two.

Only the last ingredient remained: netherworld grass.

Finally, the Flying Boat slowly stopped in front of a massive, pitch-black mountain cave.

The mountain cave before them was precisely the destination marked on the Route Map Qing Tan had given him.

The mountain cave was dark and damp, its four walls covered with slick moss.

The chisel marks on the cave walls were clearly visible; each one exuded an ancient, desolate aura, clearly having been forcefully carved open by Great Magic Power.

A hot wind, mixed with the stench of earth and the smell of decay, rushed out from the depths of the cavern, causing their clothes to flutter slightly.

"Let's go."

Yue Qingyao piloted the White Jade Flying Boat, carrying the two of them into the mountain cave.

Upon entering, the light immediately dimmed.

Water droplets seeping from the cave walls echoed in the silent passageway.

After flying for about One Hundred Zhang, the Flying Boat stopped without warning.

"Be careful."

Her voice was extremely low, and fine beads of Fragrant Sweat even appeared on her temples.

"A large number of Bone-Corroding Demon Worms are slumbering here. Conceal all your aura, and absolutely do not disturb them."

Upon hearing this, Lin Yuan's heart skipped a beat.

He followed Yue Qingyao's gaze, and his pupils suddenly contracted.

The stone wall ahead was actually covered in a layer of black armor.

It was composed of countless black beetles the size of fingernails, densely clinging to the stone wall and stacked upon one another.

The three of them concealed their entire aura and slowly passed through, walking on thin ice, but without incident.

Lin Yuan's recently raised heart slightly calmed, but he hadn't fully exhaled the stale air yet.

On the stone wall not far ahead, a Bone-Corroding Demon Worm the size of a fist was conspicuously perched.

Its size far surpassed its brethren; its carapace was pitch black like ink, gleaming with a metallic, cold hardness.

A pair of hideous compound eyes flickered with cold, eerie light in the gloom.

This was a Worm King about to advance!

If it were to flap its wings and fly high, even if it made the slightest sound, it would attract the tens of thousands of its kind behind them.

The consequences would be unimaginable.

The three of them, even Yue Qingyao, a Core Formation Stage Cultivator, would likely only end up being gnawed into white bones when facing an endless Sea of Worms.

At this critical moment, Yue Qingyao had already made her move.

She joined her fingers like a sword and quickly formed a complex set of Hand Seals.

The entire movement was smooth and flawless, not raising a breath of wind, nor causing the slightest fluctuation of Spiritual Power.

A streak of Spiritual Light, condensed to the extreme, burst forth from her fingertips, silently slicing through the air and landing precisely on the head of the massive Demonic Worm.

"I used the Soul Stabilizing Incantation on it. This worm's Divine Soul has been temporarily sealed by me, and it won't wake up for a while."

Yue Qingyao let out a breath and said in a low voice.

"Mother, you are truly amazing."

Su Qinghan patted her chest in lingering fear, then looked at the motionless Demonic Worm with shining eyes.

"This Demonic Worm looks so vicious, and this one is so huge! Mother, your Spell is too powerful; it's now like a dead thing."

She blinked, pleading with Yue Qingyao with a hint of excitement and desire: "Mother, the *Record of One Hundred Beasts* that I Cultivate requires this exotic species as a Medicinal Primer. Look, this Worm King has not yet developed intelligence, making it the best Material. It would be a pity to just leave it here. Let me try to take this worm away so I can study it carefully once we return to the Sect!"

"Don't act recklessly!"

Yue Qingyao's phoenix eyes narrowed, and she was about to stop her. "This place is strange, and the state of this Worm King is wrong. Do not create unnecessary trouble!"

However, Su Qinghan, relying on her mother's great Divine Ability, flipped her Fair Hand, and a spirit beast pouch depicting Rare and Exotic Beasts appeared in her palm.

She flicked her finger, the opening of the spirit beast pouch opened, and a gentle suction force was about to draw the Demonic Worm into it.

A sudden change occurred!

The massive Demonic Worm, whose Divine Soul should have been sealed and which should have been motionless, suddenly shot out two streaks of crimson, fierce light from its black compound eyes!

The aura within its body violently repelled the living aura of the spirit beast pouch, erupting like boiling oil hitting water, instantly shattering the restraints of the Soul Stabilizing Incantation!

"Buzz—!"

The wings on its back trembled violently, letting out a piercing shriek!

"Not good, hurry and leave!"

Yue Qingyao's face turned ghastly pale, completely losing her previous composure.

Following the massive Demonic Worm's shriek, the densely packed beetles on the stone wall behind them came alive!

"Buzz buzz buzz buzz buzz!"

Tens of thousands of Bone-Corroding Demon Worms flapped their wings simultaneously, and a sky-obscuring black Swarm of Worms surged madly toward the three people.

Yue Qingyao tapped her toe, and the White Jade Flying Boat, carrying the three, transformed into an Escape Light and sped toward the depths of the mountain cave.

Although these Demonic Worms were not slow, they couldn't catch up to the White Jade Flying Boat immediately.

The mountain cave was extremely deep, winding downwards as if endless.

While flying away, Lin Yuan forced himself to calm down. He keenly felt that the surrounding air was gradually becoming hotter.

"Continuing like this is not a solution." Lin Yuan frowned slightly and said in a deep voice.

"This mountain cave must have an end. When we reach it, we will be Turtles in a Jar, with no way to retreat."

Yue Qingyao looked back at the relentless black Swarm of Worms pursuing them; a deep worry also flashed across her phoenix eyes.

If she were in her peak condition, she would naturally have several methods to exterminate these Demonic Worms.

But now, all she could do was run.

As they continued to go deeper, the scorching aura in the air grew increasingly intense.

The cave walls ahead also began to slowly narrow, their color changing from bluish-black to scorched dark red.

"We are almost at the end!" Lin Yuan reminded loudly.

Just then, the vast, dark expanse of Bone-Corroding Demon Worms behind them suddenly stopped in unison.

They hovered about ten *zhang* away from the three people, letting out restless shrieks, completely blocking the only path of retreat, yet they seemed to face an invisible barrier and dared not advance even an inch.