I became an immortal in the mountains

Chapter 805 The Demon's Calculation
As Gu Yuanqing entered the Demon Land, he felt the surrounding spiritual energy become turbid. For millions of years, the Heavenly Demons had been eroding this realm, polluting parts of it and intending to transform it into a world more suitable for them. This pollution included not only the soil on the ground but also the underground spiritual veins.

This pollution will also greatly reduce the strength of cultivators who enter it.

As soon as Gu Yuanqing came out, he went straight to the region recorded in the jade slip given by the Great Hao Dynasty.

This place is quite far from the human defense line, nearly millions of miles away. Gu Yuanqing did not leave any divine soul imprint there, so he could only travel by escape technique.

Along the way, they encountered several Heavenly Demons at the Shattered Heaven level, but Gu Yuanqing did not make a move against them.

He didn't want to be discovered by the Demon Lord of the Dark Netherworld before he could kill the Great Demon of Chaos, so he used the Dao of Space to isolate his aura as he traveled.

He didn't have many concerns. Although the Xuan You Demon Lord was strong, as long as he couldn't block the power of the Heavenly Fishing Technique, Gu Yuanqing was fearless.

Moreover, during his time in the Nine Realms Divine Continent, he had communicated with Ling Yi and Nangong Xun, and had read many books about the Heavenly Demon within the Nine Heavens Divine Sect. In addition, with the information provided by the Great Hao Dynasty, Gu Yuanqing's understanding of the Heavenly Demon's power was far greater than before, and he was naturally more confident in killing the Heavenly Demon.

The Celestial Observatory gave the locations of three Chaotic Undying Heavenly Demons, the closest of which was a Chaotic Undying Great Demon named the Bone-Eating Demon King.

And this is Gu Yuanqing's first target!
Silver Deer Valley.

It is said that millions of years ago, this place was also a scenic spot in this region, named after the silver deer, a mythical beast that was abundant here.

However, the presence of the Heavenly Demon has completely changed this beautiful canyon. Demonic energy permeates everywhere, and the ground is covered with countless white bones.

It is dozens of miles away from the canyon.

In a place where the energy of heaven and earth was concentrated, the people of the Great Hao Dynasty were concealed within a secret treasure.

The leader was named Yan Beiming, one of the commanders of the Demon Suppression Division, and a master of the Chaotic Undying Realm.

Mo Yan, standing beside him, was a disciple of Zhan Shengjie of the Heavenly Craft Pavilion. He was able to hide his tracks in front of the Great Demon of Chaos and Immortality by using the Eight Desolate Compass to borrow the power of heaven and earth, completely merging his aura with the world. Even if divine sense swept over him, there would be nothing there.

In addition, there is Gu Zangfeng, the Pulse Finder of the Sky Patrol Bureau; Qian Ling, the Demon Slayer Captain of the Demon Slayer Bureau who comes from the Thousand Machines Sect and is skilled at dismantling demonic runes; and two other experts from the Sky Patrol Bureau, each of whom is at least at the peak of Yin-Yang level.

This team is undeniably strong; they could even put up a fight against the Undying Demon of Chaos.

Of course, without such strength, one would not dare to venture deep into the Demon Realm.

"My lord, will Gu Yuanqing really come?" Qian Ling asked in a low voice.

Yan Beiming gazed into the distance and calmly said, "This place is the closest and relatively independent, and it is far from the Demon Abyss. It is the least likely place for the Xuan You Demon Lord to notice. If he is truly hunting demons, he will definitely choose this place. Once he fights with the Bone-Eating Demon and lures it away from its lair, that will be the time for us to collect the Ten Thousand Years of Sinking Star Iron."

Most of the day has passed.

Gu Yuanqing arrived silently above the valley, his Void Heavenly Eye looking down.

Suddenly, his gaze paused slightly and fell directly on the hiding place of Yan Beiming and the others.

Sensing Gu Yuanqing's gaze, Yan Beiming suddenly turned his head to look towards the valley. The others were also startled when they saw this, and those who had been sitting down to rest all stood up.

"Sir?" Qian Ling said.

Yan Beiming said in a deep voice, "Gu Yuanqing has arrived and has also noticed our presence."

Everyone stared intently before they could clearly see Gu Yuanqing, who was faintly visible in the void. Even though they could see his figure, they seemed to subconsciously ignore his existence, as if he did not exist in this space-time.

Mo Yan was shocked: "How is this possible? We've been here for tens of thousands of years and we haven't even noticed the Corrosive Bone that has been operating here. How did he see through it?"

Yan Beiming said, "No wonder Senior Ling of the Nine Heavens Sword Sect values ​​it so much. Just based on this alone, it is far superior to ordinary Chaotic Undying!"

While the group was talking, Gu Yuanqing, who was standing above Silver Deer Valley, made his move.

He pointed his fingers together as a sword, and unleashed the Myriad Manifestations Sword of Calamity. Countless sword shadows fell, and under the sword energy, the poisonous miasma parted. The sword energy penetrated the ground, and the earth, which had turned into demonic soil, could not be stopped in the slightest.

The sword energy flowed like mercury onto the ground, penetrating deep into the demon's lair.

"Roar--!"

A deafening demonic roar resounded through the heavens, and the earth bulged and cracked violently like an eggshell!
A terrifying demonic figure, a thousand feet tall, burst forth from the earth—it was none other than the Bone-Eating Demon King!
Its demonic body was as majestic as a mountain, constructed entirely of bones that gleamed with a dark, metallic sheen. Its hardness was comparable to that of top-grade divine metal, and when sword energy struck it, it produced the sound of steel clashing.

This is the result of its long-term absorption of the essence of the sunken star iron to temper its demonic body!

Dark red demonic patterns are naturally engraved on the bones, and dark red viscous demonic energy flows within them.

Its head was ferocious, resembling both a dragon's head and a ghost's face, with two eerie green soul flames burning fiercely in its eye sockets, radiating a chilling aura that could freeze one's soul.

As soon as it emerged, the Bone-Corroding Demon Realm instantly unfolded, causing trees to wither and all things to decay. Yan Beiming and others, dozens of miles away, suddenly felt their minds shake, as if a demon was about to be born.

"Humans? You ants-like beings, how dare you invade my territory!" The Bone-Eating Demon King roared, his giant claws covering the sky, slamming towards Gu Yuanqing with the power to tear apart the laws of nature. Wherever the claws passed, they left behind corrosive black marks in the space.

Gu Yuanqing remained calm. The intelligence reports from the Great Hao Dynasty provided a detailed account of this Chaotic Undying Demon.

This Heavenly Demon is similar to the Bone Demon in the outer void of the Spirit Realm. Although its body is not as tall as that Bone Demon, its strength is even greater.

It was even more powerful than the demons they had killed before. Taking advantage of the terrain, it continuously gathered demonic energy from the ground to its body. Its power was vast and immense. With a single slap, a small mountain instantly collapsed, destroying everything in its path, as if nothing could withstand it.

However, this could not harm Gu Yuanqing. His figure was unpredictable, and the Bone-Eating Demon King could not even touch the hem of his clothes.

He activated the Taixu Ruyi Dharma Robe to resist the interference of the Heavenly Demon's demonic thoughts, and also used the Yujie Wanxiang Sword to evolve a sword formation to fight against the thousand-foot-tall demonic body. The Huntian Yuanhuo was also opened to envelop the Bone Demon and quickly wear down its demonic energy.

The Bone-Eating Demon King grew even more enraged. With a roar, a violent shockwave emanated from him, spreading in all directions. The space itself could hardly withstand this power, and countless tiny cracks were constantly created and destroyed in the impact.

Everything in its path crumbled and turned to dust.

At the same time, its howling sound also captivates the mind, disturbs the soul, and breeds all sorts of fantasies.

But Gu Yuanqing just smiled calmly. Such an attack might be troublesome for others, but he was proficient in the Dao of Space and had the Taixu Ruyi Dharma Robe, so he couldn't do anything to him.

……

At that very moment, Yan Beiming, dozens of miles away, shouted in a low voice: "Action!"

The group of six was enveloped in a beam of light and descended underground using earth-遁 (earth-遁 is a type of magic or technique).

The Nine Realms Divine Continent has been fighting against the Heavenly Demons for millions of years and has conducted in-depth research on them. Even in this demonic land polluted by demonic energy, their earth-遁 (earth-遁 is a technique for escaping through the earth) will not be affected. In fact, they can even avoid the Heavenly Demons' perception at the same time.

The deeper they went, the denser the demonic energy became, enough to affect the divine sense of ordinary cultivators. However, guided by Gu Zangfeng's vein-finding technique, they quickly entered the crevice nest and followed the fissures straight into the earth's veins. "This way!" Gu Zangfeng pointed with a compass.

They quickly located a mineral vein that emitted a blue starlight glow within the earth's veins. These mineral veins contained immense stellar power, yet they had become dark and gloomy due to the influence of demonic energy.

"It really is the Ten Thousand Years Old Star Iron! It's a pity that most of it has been corrupted by the Heavenly Demon, and it will probably take a lot of effort to remove the demonic energy from it," Mo Yan said.

Yan Beiming said in a deep voice, "It's good that we can find it. Let's make our move. We don't know how long the battle up there can last. Moreover, if the Demon Lord Xuanyou notices the battle here and sends an avatar, then we'll be in big trouble!"

Mo Yan immediately stepped forward, took out a specially made array plate, and made a hand seal, preparing to separate it from the earth vein.

Qian Ling continuously cast spells to peel away the naturally formed demonic patterns around the mineral marrow and suppress the demonic thoughts within, in order to prevent the heavenly demons on the ground from noticing.

Yan Beiming held his halberd, on guard, alert to any potential danger.

However, just as Mo Yan's array plate touched the core mineral marrow and was about to activate and collect it...

boom! ! !
The ground beneath their feet suddenly exploded, revealing a huge, dark golden bone palm that swung towards the six of them.

Yan Beiming's expression changed, and he swung his sword fiercely. The dazzling sword light collided with the giant palm, and the force of the impact echoed and intertwined in the cave, causing the entire lair to shake violently.

The next moment, the Bone-Eating Demon King, who should have been fighting Gu Yuanqing outside, burst out of the ground!

Its eerie green soul fire looked down mockingly at the few people who were in a panic, its enormous demonic body almost filling the entire lair space.

It cackled loudly and said in a deep voice, "Foolish humans! You still want to covet my treasures? This demon's lair is already one with my demonic body. You thought you were luring me out of the lair, but little did you know... that's right, this is called inviting the enemy into the trap, we're just waiting for you to come to us."

In an instant, countless dark red demonic patterns lit up on the surrounding rock walls, transforming into a raging demonic fire purgatory array that even imprisoned the void, completely trapping Yan Beiming and his companions within.

"We've fallen into their trap!" Yan Beiming's expression changed drastically, and he shouted in a low voice.

"Gu Yuanqing!" Mo Yan suddenly pointed at the Bone-Eating Demon King's shoulder and shouted in a terrified voice.

Everyone looked in the direction of the sound and saw a figure in blue standing calmly on the shoulder of the Bone-Eating Demon King. Who else could it be but Gu Yuanqing!
Yan Beiming's pupils shrank to the size of pinpoints, and an intense, almost tangible killing intent emanated from his body. He practically spat out the words through clenched teeth: "Gu, Yuan, Qing! No wonder...we fell into this ambush! So you're actually a lackey of the Heavenly Demon! His Highness shouldn't have trusted you! I knew it, how could a mere Undying Realm cultivator contend with the Xuan You Demon Lord's avatar without being defeated? It was all a conspiracy after all!"

Upon hearing this, "Gu Yuanqing," who was standing on the Demon King's shoulder, looked down at them with a mocking smile: "It's a little too late to know now."

"Late?" Yan Beiming laughed angrily, raising his long sword diagonally, a strong sword intent spreading out. "You arrogant demon! The outcome is still uncertain! As long as one of us can escape today, your scheme will not succeed."

"Escape?" Gu Yuanqing shook his head slightly, as if mocking their naivety: "Since we've entered this place, then... there's no going back. If I wasn't confident, why would I show myself? Aren't you furious? That's for the best. That's what makes the soul more interesting."

Before he finished speaking, he pointed his finger, and countless sharp and unparalleled sword energies were generated out of thin air, like a storm, instantly filling the entire nest space!

The Bone-Eating Demon King also cackled and attacked, his enormous palm sweeping across, leaving Yan Beiming and the others nowhere to hide.

The demonic fire intensified, and the entire cave seemed to instantly transform into a purgatory.

"Kill!" Yan Beiming roared, unleashing the full power of his sword technique. The sword light surged like a reversed Milky Way, fiercely slashing towards the Bone-Eating Demon King and "Gu Yuanqing".

The intent of the blade and the intent of the sword intertwined, and the wills of the two also clashed in the void.

However, the Bone-Eating Demon King's body was indestructible. With a wave of its giant hand, it stirred up the demonic energy of the entire lair, blocking and deflecting most of Yan Beiming's attacks.

On the Great Hao Divine Dynasty's side, Mo Yan's body flashed with light, and several magical treasures flew out one after another. However, he was only at the Shattering Heaven Realm, and under the power of the Chaotic Undying level, they were of little use.

With bloodshot eyes, Gu Zangfeng disregarded his own limits and forcibly drew upon deeper layers of earth vein energy, transforming them into several roaring, earth-yellow dragons that coiled around the legs of the Bone-Eating Demon King, yet only managed to make his body sway slightly.

The other three cultivators were in even greater danger. Their cultivation was weaker, and they could only barely intervene by forming a battle formation and relying on their Thousand Machine Demon-Slaying Crossbows.

The battle lasted only a dozen breaths before the Great Hao Dynasty's formation completely collapsed under the suppression of the Bone-Eating Demon King and "Gu Yuanqing"!

A powerful sword aura shattered Yan Beiming's sword barrier, instantly severely injuring Gu Zangfeng, who was doing his best to maintain the earth's vein power. Taking advantage of the opportunity, the Bone-Eating Demon King struck down with his palm, directly crushing the other three cultivators into dust!
The Bone-Eating Demon King even grabbed the remaining soul and essence, put them into his mouth, and revealed a look of enjoyment in his oily green eyes.

Yan Beiming's eyes were bloodshot, but he was already injured and couldn't save him. He saw Mo Yan also being hit by a sword aura, spitting blood and flying backward, his magic weapon destroyed. The Bone-Eating Demon King then grabbed at him again.

Yan Beiming had already made up his mind, and roared, "Even if I die, I'll drag you all down with me!"

He held nothing back any longer, and a roar like stars collapsing emanated from his body!
Sword Dao Secret Technique - Heavenly Blade Demon Slayer!

Without hesitation, he ignited his own divine soul essence, compressing and burning all his life's cultivation, blood essence, and even his immortal foundation, and gathering it into the long sword in his hand!

The longsword instantly became incredibly bright, radiating a destructive aura that even the Bone-Eating Demon King sensed as a threat!
"cut!"

A dazzling blade of light, beyond description, tore through the demonic energy, severed the sword domain, and, carrying Yan Beiming's unwavering will, fiercely slashed towards the Bone-Eating Demon King and "Gu Yuanqing"!
The Bone-Eating Demon King roared as he crossed his bone arms to block, but because his legs were entangled by the earth dragon, his massive body was cleaved backward, a deep crack appearing on his hard bones, and the eerie green soul fire flickered violently.

Gu Yuanqing's expression also seemed to change slightly. He unleashed a barrage of sword energy to block the attack, forcing him to retreat.

This retreat, this strike that embodied the full power of a cultivator in the Chaotic Undying Realm, forcibly tore open the great formation that had trapped this place, briefly creating a slight opening in the imprisoned void!
"Now!" The heavily injured Gu Zangfeng roared, slamming his hands into the ground. Using his remaining strength and Dao foundation as a guide, he unleashed his final forbidden technique—Earth Vein Return to Ruins!
Rumble!
He instantly activated and detonated the earth veins beneath the entire Silver Deer Valley!
Terrifying energy erupted from the ground, drawing towards the Bone-Eating Demon King and "Gu Yuanqing".

"Go!" Gu Zangfeng roared with his last bit of strength, and then his body turned to ashes under the backlash.

Mo Yan was in tears, but he dared not hesitate for a moment. He crushed the life-saving item given to him by his master in his arms—the Great Teleportation Talisman!

A spatial force enveloped him, and his figure instantly disappeared from the spot. The next moment, he appeared tens of thousands of miles away. He then immediately burned his divine soul and used a life-consuming escape technique, desperately flying towards the human realm at all his might!
He must return alive and report everything he has seen today to the imperial court!
Inside the lair, the aftershocks of the explosion gradually subsided, and most of the cave collapsed.

Yan Beiming had exhausted everything. He stood there, using his sword to support his body, which was beginning to crumble inch by inch and eventually turn to ashes, yet a smile remained on his lips.

But to his surprise, the Bone-Eating Demon King's anger seemed to have disappeared, and its wounds were slowly repaired under the nourishment of demonic energy.

Meanwhile, Gu Yuanqing, who should have been anxious, remained calm, even with a hint of mockery. He raised his hand and grabbed, and strands of scattered spiritual power gathered in his palm.

"It's a pity that I've exhausted my strength, but the spiritual power generated by this extreme emotional sublimation is also more meaningful."

……

Let's turn back time a little.

Above Silver Deer Valley, a glint flashed in Gu Yuanqing's eyes, and he let out a soft exclamation, saying, "You're not the Bone-Eating Demon King?"

"You saw through it so quickly? No wonder the master values ​​you. It seems I'm not proficient enough in this art of transformation!"

The Bone-Eating Demon King's body rapidly shrank, its dark golden bones shrinking inward, and demonic energy surging out, gradually transforming into a physical form.

(End of this chapter)