The mortal realm has been cleansed, but the last hidden danger remains.

Inside the Ten Thousand Demon Valley hall, it was empty and silent.

Nightmare sat alone on the obsidian Demon Throne, his fingertips unconsciously tapping the armrest, producing a faint and rhythmic tapping sound.

Outside the hall, the clamor and undercurrents stirred by his return and iron-fisted integration in the Ten Thousand Demon Valley, and even the entire Mortal Realm Demon Alliance, seemed to be isolated by an invisible barrier.

His thoughts, however, were no longer in the hall, nor in the Ten Thousand Demon Valley.

With the Spirit Realm Heavenly Dao destroyed, the Reverse Path Demon Alliance newly established, the trip to the Immortal Realm was imminent.

The rear seemed stable, and the overall situation was in his grasp.

But in Nightmare's heart, there was always a thorn.

Heavenly Dao.

In the worlds he had experienced, this term was never a vague concept.

It was a set of rules, a force of will, a vast and deeply rooted system.

In the Spirit Realm, he had beheaded the core, cleared the strongholds, and extinguished the final forces.

In the Mortal Realm, he had swept away all the attached Sects on the surface, establishing the absolute rule of the Demonic Path.

But was it truly... clean?

The infiltration of the Heavenly Dao system was like stubborn vines, pervasive.

Those ancient Sects with long legacies whose ideologies were long bound to the so-called "Heavenly Dao Orthodoxy"; those Families that surrendered on the surface but secretly continued to worship the Heavenly Dao tablets and harbored delusions; even those Heavenly Dao Loose Cultivators and remnant believers who fled and hid, lurking in every corner of the Mortal Realm like rats in a gutter.

These people might not be strong, and they couldn't stir up big waves.

But they were "roots," they were "seeds."

They might be harmless in daily life, but once he left the Mortal Realm, went deep into the Immortal Realm, and had a fierce conflict with the immortal realm heavenly dao, or even fell into some kind of predicament... these roots and seeds could be remotely activated by the immortal realm heavenly dao will, becoming poisonous thorns stabbing from behind, becoming ant-holes shaking the Foundation of the Mortal Realm.

"Hidden dangers must be cleared."

A cold glint flashed in Nightmare's eyes, and he made a decision.

"Before heading to the Immortal Realm, any forces, individuals, or legacies within the Mortal Realm that have ties to the Heavenly Dao... must be uprooted, leaving not a blade of grass!"

He didn't need evidence, he didn't need a trial.

Between the righteous and the reverse, it was already clear.

Anyone who attached themselves to the Heavenly Dao was an obstacle on his Reverse Path, a potential enemy.

For enemies, only by slaughtering them all could one be at ease.

Nightmare's figure disappeared silently from the Demon Throne.

He didn't alert anyone, not even the Deputy Alliance Master, the Valley Master of the Ten Thousand Demon Valley.

To clean up the final dust, he alone was enough.

In the eastern part of the Mortal Realm, the mountains were towering, surrounded by clouds.

An ancient Sect gate with magnificent momentum and rich Dao atmosphere stood on the peak of the main mountain.

The two characters "Wudang" on the gate tower were written with iron strokes and silver hooks, with faint Taiji Dao atmosphere flowing.

This was one of the leaders of the Mortal Realm's Righteous Path, the Wudang Sect, which had been passed down for tens of thousands of years.

Even now, when the Demonic Path unified the Mortal Realm, the Wudang Sect's guardian Formation, the "Wudang Taiji Formation," was still fully activated.

Layers of black and white intertwined Taiji light curtains covered the entire main peak tightly.

As the light curtains flowed, Yin and Yang Qi were endless, and its defensive power could be called the best in the Mortal Realm.

Inside the Sect, the atmosphere was solemn and tragic.

All Disciples were armored and armed, guarding every Formation eye, their eyes filled with determination.

They had rejected the Demon Alliance's "recruitment" and chose the most thorough opposition.

A black-robed figure appeared abruptly outside the Wudang Sect gate, standing in the air; it was Nightmare.

His arrival did not cause any spatial fluctuations, as if he had always been there.

Inside the Wudang Sect, the alarm bell rang loudly!

"Devil Head! It's that Devil Head Nightmare who has come personally!"

An Elder's eyes were splitting, and he shouted hoarsely.

"All Disciples, hold your positions, activate the Formation! Swear to coexist with the Sect!"

The Wudang Sect Master's old and determined voice resounded through the mountain peak.

The black and white Taiji light curtain shone brightly, the Yin and Yang fish rotated rapidly, emitting a vast and tough defensive power.

More lights containing the intention of Taiji strangulation condensed within the Formation, ready to be launched.

Nightmare's gaze swept calmly over the magnificent guardian Formation, as if looking at an exquisite toy.

He did not look for the Formation eye or crack the runes as he usually did when breaking Formations.

Today, what he wanted was the most extreme destruction, the most thorough deterrence.

He slowly raised his right hand, spread his five fingers, and aimed at the black and white Taiji light curtain covering the entire mountain peak below.

In his palm, a dot of dark red flame, so extreme that it seemed to devour Souls, suddenly lit up.

Then, the Dao Reversal Demonic Star Flame surged out without reservation!

It was no longer scattered flames, but condensed into a dark red spiral fire drill, only an arm thick, yet so solid it seemed like a solid object, with an extremely sharp tip!

The moment the fire drill appeared, the surrounding space let out an unbearable groan, the light distorted, and the temperature did not soar, but instead, a deathly silence and coldness like the return of all things to ruins spread out.

"Break."

Nightmare spat out a word, and his right hand pressed down virtually.

The dark red spiral fire drill pierced silently, aiming directly at the very center of the Taiji light curtain, the hub of energy circulation—not a weakness of the Formation, but its strongest point!

Breaking cleverness with force, crushing all defenses with absolute power!

"Hum—Boom!!!"

The dark red fire drill collided with the black and white Taiji light curtain!

There was no stalemate, no violent explosion and cancellation of energy.

There was only one-sided, destructive... penetration and annihilation!

The Formation light curtain, known as the number one defense in the Mortal Realm, where Yin and Yang generated each other endlessly, was like fragile glass encountering a red-hot diamond drill the moment it touched the dark red fire drill!

"Crack... Boom!!!"

A teeth-aching sound of shattering rang out in an instant!

The black and white light curtain cracked with countless spiderweb-like fissures centered on the impact point of the fire drill, and the dark red Demonic Flame crazily eroded and spread within the fissures!

The entire operation hub of the Formation was violently pierced, and the balance of Yin and Yang Qi was completely broken and reversed!

It only supported for less than a breath.

"Boom—!!!"

The huge Taiji light curtain covering the Wudang main peak exploded completely!

It turned into black and white light spots filling the sky, and was then swept, swallowed, and annihilated by the following tide of dark red Demonic Flame!

The guardian Formation, broken!

"Pfft!" "Ah!"

Inside the Sect, countless Wudang Disciples and Elders who were hosting the Formation spat blood simultaneously, suffering severe backlash.

Those with weaker cultivation had their Meridians completely severed and passed out.

The Wudang Sect Master looked desperate, but still roared: "Wudang Disciples, follow me to kill the enemy! Let's perish together!"

However, before his roar fell.

The dark red spiral fire drill that broke the Formation did not dissipate, but suddenly expanded and differentiated in the air, turning into countless fine dark red fire lines, like tentacles with life, or a net of the Grim Reaper, covering every corner and every living creature within the Wudang Sect gate with lightning speed!

Regardless of cultivation level, regardless of status.

From the Sect Master and Elders, to the true Disciples, inner Disciples, Outer Sect Disciples, and even servants...

As long as they were within the Wudang Sect gate, as long as they had the Wudang Cultivation Technique true Qi flowing in their bodies, which was of the same origin as the broken Formation and carried the Aura of Heavenly Dao orthodoxy...

"No—!"

"Devil, you will die a horrible death!"

"Heavenly Dao is above..."

"Help..."

Terrified screams, desperate curses, futile resistance, humble pleas... various sounds instantly filled the Sect gate, but in the next moment, they stopped abruptly.

The dark red fire lines gently brushed over every target.

Like the gentle kiss of the Grim Reaper.

The Wudang Cultivators touched by the fire lines first froze slightly, then their pupils dilated, and their life Aura disappeared instantly like a snuffed-out candle flame.

Immediately after, the dark red Demonic Flame ignited from within their bodies, silently but highly efficiently burning flesh, bones, clothing, Magic Treasures... everything that existed into the finest ashes, not even a wisp of green smoke rose.

From the main hall on the peak, to the courtyard on the mountainside, to the marketplace at the foot of the mountain...

Wherever the net of fire swept, not a blade of grass grew, and human traces disappeared.

It only took a dozen breaths of time.

The Wudang main peak, which was originally rich in Dao atmosphere and beautiful, became deathly silent.

All buildings were intact (the Demonic Flame only burns life and specific energy), but empty of people, terribly clean.

Not even a trace of blood or battle remained, only the faint, lingering, destructive Aura of the Reverse Path in the air, and the omnipresent, bone-deep cold of death that had penetrated the rocks and wood.

The Wudang Sect, passed down for tens of thousands of years, one of the giants of the Righteous Path in the Mortal Realm, was thus completely annihilated.

From top to bottom, not a chicken or dog remained, and their Souls were destroyed.

Nightmare hovered in the air, coldly overlooking the silent mountain peak below.

His Divine Sense swept over every inch of land like a tide, and after confirming that there were no signs of life or remnants of Heavenly Dao Aura, he flicked his finger, and a spark fell into the Sect's library.

It was not burning, but a wisp of Reverse Path rules contained within it scrambled and erased all information in the Jade Slips, classics, and stone carvings in the library that recorded Wudang Cultivation Techniques, legacies, and history, turning them into meaningless garbled code or blank spaces.

After doing all this, Nightmare's figure flashed and disappeared.

He did not stay for a moment and rushed to the next target.

In the southern part of the Mortal Realm, the "Tiangong Sect," famous for Artifact Refining, activated its guardian Formation, the "Thousand Hammer Refined Vajra Formation," and the whole Sect vowed to coexist with the Sect's Foundation.

Nightmare arrived, and it was also a dark red spiral fire drill that violently pierced the core of the Vajra Formation.

The Demonic Flame differentiated and swept through the entire Sect.

The furnace fire for Artifact Refining was still warm, but the people had turned into flying ash.

The Legacy classics had their information erased.

In the northern part of the Mortal Realm, the "Xuanji Pavilion," which excelled in Formations and Talismans, tried to delay and trap the enemy with layers of interconnected Formations.

Nightmare didn't even look at those complex Formations.

The Dao Reversal Demonic Star Flame turned into a monstrous sea of fire, burning all Formation nodes and the Cultivators within the Formation with the violence of covering the entire mountain gate.

The Formation was broken, and the people died in an instant.

The runes dissipated, and the Legacy was cut off.

In the western part of the Mortal Realm, the "Youming Sect," which acted secretly and had connections with some hidden Heavenly Dao remnants in the Spirit Realm, hid its Sect gate deep in the underground Yin veins.

Nightmare directly used the power of the lingyuan reverse key to induce the underground Yin evil to reverse, causing the Yin veins to go wild, burying and eroding the entire underground Sect along with the Cultivators inside.

Then the Demonic Flame poured in, completely purifying it.

In the central part of the Mortal Realm, the "Yaowang Valley," which was based on Alchemy and had secretly provided Medicinal Pill support for Heavenly Dao remnants, had the Valley Master trying to offer all the treasured Medicinal Pills to survive.

Nightmare did not say a word, the Demonic Flame swept by, and the Medicinal Pills and the alchemists were burned together.

The Pill Formula legacies were erased together.

One Sect after another.

Regardless of the scale of the Sect, regardless of whether the resistance was fierce or weak, regardless of whether the begging for mercy was sincere.

As long as it was marked as "Heavenly Dao affiliate" or "potential threat" by the perception of the star dao fruit or the dao reversal key, there was only one outcome.

The entire Sect was annihilated, not a chicken or dog remained, and the Legacy was completely destroyed.

Nightmare was like the most precise and cold machine of destruction, drawing trajectories of death on the land of the Mortal Realm.

His speed was too fast, and his methods were too absolute, so much so that many more distant Sects hadn't even received the news of the previous Sects being destroyed before the shadow of destruction descended on their heads.

During the purge, there were naturally fish that slipped through the net.

Some alert Heavenly Dao Loose Cultivators, or those who were already wandering outside the Sect, sensed the impending disaster and tried to hide their Aura, fleeing to desolate mountains, Mortal cities, or even trying to escape to other remote small realms through secret teleportation arrays.

Nightmare's Divine Sense, with the improvement of his cultivation and the blessing of the dao reversal key, had reached an incredible level.

When he was determined to clean up, almost all major areas of the Mortal Realm were under his perception.

For those who fled, he didn't even bother to send a Clone to chase.

Standing in a high altitude, Nightmare closed his eyes again.

"Dao Reversal Ultimate Kill Domain—Net of Divine Thought."

With him as the center, the dark red Dao Reversal Ultimate Kill Domain did not unfold in the form of flames, but turned into an invisible and intangible, yet real, giant net of Divine Thought covering more than 90% of the inhabited areas of the Mortal Realm!

On this net, every node carried the destructive characteristics of the Dao Reversal Demonic Star Flame, as well as absolute sensitivity to the Heavenly Dao Aura.

Anyone who was fleeing, anyone who had the Heavenly Dao Aura in their Cultivation Techniques or Soul imprints, anyone who harbored hostility and fear towards him...

Under the sweeping of this net of Divine Thought, they were like fireflies in the dark night, with nowhere to hide.

Then.

"Extinguish."

Nightmare spat out a word softly.

The net of Divine Thought suddenly contracted and vibrated!

In various parts of the Mortal Realm, in the wilderness, caves, corners of towns, deep in the seabed... hundreds or thousands of different locations simultaneously lit up with an imperceptible dark red spark.

Then, the sparks went out.

Those hiding and fleeing Heavenly Dao Loose Cultivators and remnant believers, regardless of their cultivation level, no matter how deep they hid, at the same moment, their Souls were hit by an invisible heavy hammer, instantly collapsing and annihilating!

Their bodies fell softly to the ground, losing their life force rapidly, and the remaining Heavenly Dao Aura in their bodies was purified by the Reverse Dao Power.

Clean and neat, remote ultimate kill.

After doing all this, Nightmare slowly opened his eyes.

The net of Divine Thought covering the Mortal Realm was retracted.

He stood quietly in the air, his Divine Sense like the most precise scanner, slowly sweeping over the entire Mortal Realm again.

It was gone.

Those strongholds of Heavenly Dao Aura that were once visible or hidden, those Sects whose legacies carried the deep brand of Heavenly Dao orthodoxy, those Loose Cultivators and believers who harbored delusions... all the Auras had disappeared.

Within the Mortal Realm, there was no longer any explicit existence of the Heavenly Dao system.

Even if there were a few individual fish that had hidden extremely deeply or whose cultivation was too low to be marked, they were destined not to amount to anything and would only naturally die out with the passage of time and the rule of the Demon Alliance.

"Hidden dangers have been removed."

Nightmare whispered to himself, his eyes cold and indifferent.

He had no emotional fluctuations after the slaughter, as if he had just completed a necessary cleaning job.

Looking up at the sky, the sky of the Mortal Realm was still turbid, but it seemed "cleaner" than before.

It was time to go back.

Confirm one last time, and then, it was time to take that step and go to that higher and more dangerous world.

Nightmare's figure flickered, turning into a dark red stream of light, returning in the direction of the Ten Thousand Demon Valley.

The Karma of the Mortal Realm, at this point, was considered completely settled.