While the player is in Battle Through the Heavens, the system is in The Great Ruler.

Chapter 206 Azure Profound Sword Embryo, Prototype of Divine Power!
Ten days later.

Deep within Tianmu Mountain lies the core of the Blood Pool, where the energy is most concentrated.

Lu Yu sat cross-legged on a giant seven-colored lotus flower. The lotus flower slowly rotated, emitting soft and mysterious rays of light that nourished his body and soul.

Beneath him, an enormous level-five spirit-gathering array was operating at full power, frantically gathering the energy of heaven and earth within a radius of hundreds of miles, forming an almost liquefied energy vortex that completely submerged his figure.

With this double boost, Lu Yu's aura visibly increased and condensed. After an unknown amount of time, the powerful energy fluctuations finally reached a critical point and slowly stabilized.

He slowly opened his eyes, a brilliant purple-gold light flashing in them. He felt the vast battle qi flowing through his body, which had already stabilized at the peak of the three-star Dou Zun level.

"A three-star Dou Zun at its peak... not bad."

Lu Yu muttered to himself, but he didn't seem entirely satisfied with the speed.

The energy concentration in the lower plane was ultimately too low. Even with the help of a level-five spirit-gathering array and the Seven Apertures Spirit Lotus to forcibly gather the energy of heaven and earth, the total amount of energy in the surrounding world had its limits.

Lu Yu could clearly sense that with the energy concentration of the Tianmu Mountains, setting up a level 5 spirit-gathering array was already the limit, and it was simply unable to support the "Supreme-level spirit-gathering array" that was sufficient for the daily cultivation of a Dou Sheng powerhouse.

After all, the energy required for a supreme-level spirit-gathering array is enormous, far beyond what Tianmu Mountain can currently withstand.

However, the Spirit Treasure Pavilion has already come into the Soul Palace's sights, and the high-hanging kill order is like a sharp sword hanging overhead. Relying solely on the current cultivation speed is far from enough.

He needs greater power, and even more so, a powerful weapon that can unleash his full combat potential!

With his mind made up, Lu Yu moved and disappeared from the seven-colored lotus and the spirit-gathering array. The next moment, he appeared in the council hall and summoned Cai Lin and Little Fairy Doctor.

"I need to leave for a while and go to Yecheng."

Lu Yu said directly, his gaze sharp as a sword, "The threat from the Soul Palace is growing daily, and I must improve my strength as soon as possible. This trip requires me to go to the Ye family and use their ancient 'Yang Fire Altar' to forge a natal sword that belongs to me."

He now possesses three Heaven-rank combat skills: the Quasi-Heaven-rank movement technique Dragon Soaring Technique, the Heaven-rank low-level attack combat skill Great Luo Heavenly Flame Sword, and the Heaven-rank low-level finger technique Four Symbols Sword Finger.

In terms of power, the Great Luo Heavenly Flame Sword is the most powerful sword technique, after all, in the vast world, sword cultivators are the number one school when it comes to killing.

If a sword that is compatible with it can be successfully forged, and then the Great Luo Heavenly Flame Sword can be used to unleash its power, its power may be even higher, reaching a level comparable to a mid-level Heavenly Rank combat skill!
At that time, with such methods, they will be invincible within the Dou Zun territory, and even when facing the pursuit of the Soul Hall, they will have more confidence to resist.

Both women nodded upon hearing this, their expressions showing concern.

Immediately, Little Fairy Doctor said softly, "Let Elder Yao accompany you. Although the Ye family is famous for the Yang Fire Ancient Altar, its power is not what it used to be. It is hard to guarantee that other forces will not covet it, or... that the Soul Palace will secretly set up an ambush. With Elder Yao, a first-stage Dou Zun, accompanying you, you will have an extra layer of protection."

After a moment's thought, Lu Yu nodded in agreement: "Very well. With Elder Yao traveling with us, it will certainly save us a lot of trouble."

With the matter settled, Lu Yu did not delay any longer. He immediately sent a telepathic message to Venerable Tianhuo, and in a short while, a fiery red streak of light swept in from the back mountain, its aura scorching and powerful. It was none other than Venerable Tianhuo, who had recently made a breakthrough.

"Master, are we about to set off?"

Venerable Tianhuo laughed loudly, his eyes gleaming with a sharp light, clearly showing his anticipation for this trip.

"Well, I'll be troubling you with this trip to Ye City, sir," Lu Yu said with a smile.

"Haha, you're too kind, Pavilion Master! This old man's bones are just getting some exercise!" Venerable Heavenly Fire laughed heartily.

The two nodded to each other, saying nothing more. With a simultaneous movement, they tore through the space before them, stepping into the distorted void passage and speeding towards Ye City in the Pill Domain.

—————————————————————

Soon after,

Ye City, in the northern part of Danyu.

This lush city, nestled on a vast plain, welcomed two visitors dressed in black robes. The two figures descended silently from the sky, not lingering in the city streets, but heading straight towards the most magnificent complex in the city center—the Ye family's residence.

A moment later, the two were standing in front of the imposing gates of the Ye family mansion. The Ye family guards, seeing the deep aura of the newcomers, dared not be negligent and immediately stepped forward to inquire.

One of the men in black robes stepped forward and said calmly, "Please inform Elder Ye Zhongcheng that an old friend has come to visit. We have already sent word."

Upon hearing this, the head of the guards' expression hardened, and he respectfully said, "Please wait a moment, both of you." He then quickly turned and went inside to report.

Not long after, a series of slightly hurried footsteps came from inside the door. Ye Chong, the First Elder of the Ye family, surrounded by several other elders, personally came out to greet them. His gaze fell on the black-robed man at the head of the group, and a warm and solemn smile immediately appeared on his face:

"Honored guest, I am deeply sorry for not welcoming you properly! Please forgive me! Please come in!"

Ye Zhong stepped aside and led Lu Yu and Venerable Tianhuo into the mansion, his attitude extremely polite.

As he led the way, he said, "After receiving your message, I have already ordered preparations to be made. The Yanghuo Ancient Altar is ready to be used at any time. Please follow me."

After saying that, he personally led the two of them toward the secluded place deep within the Ye family compound where the ancient altar was kept.

About ten minutes later, the three arrived at a secluded gravel plaza deep within the Ye family compound. In the center of the plaza stood an ancient altar, its massive stones bearing the marks of time, clearly indicating its long existence.

As Lu Yu approached the altar, he noticed that the light there was exceptionally bright, and the closer he got to the altar, the hotter and purer the energy became. Beams of light poured down from the sky, and after being reflected by the smooth stone walls around them, they all converged on a pitch-black stone tablet in the center of the altar.

"Beneath this stone tablet lies an eye of subterranean fire,"

Ye Zhong explained, "Moving the stone tablet will cause flames from the earth's core to burst forth, colliding with the sunlight gathering above and igniting to form Yang Fire..."

As he spoke, he gently placed his palm on the dark stone tablet, released a slight burst of fighting spirit, and slowly pushed it. With a low, grinding sound, the stone tablet moved aside, revealing a bottomless, dark hole beneath it.

At the same time, the seemingly fixed stone walls around the altar emitted a rumbling sound and began to move slowly, completely surrounding the altar in the blink of an eye.

When the circular stone wall completely closed, the inner surface became as smooth as a mirror. Countless beams of light were rapidly reflected by the mirror surface, eventually converging at the eye of the earth, forming a dazzling white ball of light.

Just then, a tiny wisp of blood-red flame suddenly shot out from the hole in the ground and collided violently with the ball of light above!
With a "poof", a ball of white flame appeared out of thin air, filled with countless blood-like veins that spread throughout the flame like blood vessels.

"This is the Yang Fire."

Ye Zhong said solemnly, his tone filled with emotion.

Knowing that this place was not suitable for lingering, he cupped his hands to Lu Yu and said, "The Yang Fire has appeared. I cannot disturb the process from here on out. If you need anything, please let someone know at any time. I will be waiting for you."

After Ye Zhong left, Venerable Tianhuo slowly circulated his battle aura, solemnly guarding the entrance to the altar, and said in a deep voice: "Sect Master, please proceed with confidence. I will protect you here and will not allow anyone to disturb you."

Lu Yu nodded slightly, then held his breath and concentrated, preparing to begin forging his natal sword. With a wave of his hand, three materials radiating different lights and immense energy floated in front of him.

The first thing to appear was an irregular piece of metal, about the size of a fist, completely black, with strange crimson patterns covering its surface. It writhed slowly like a living thing, radiating an astonishingly hot aura.

Seventh-tier material, Meteorite Mystic Iron. Immediately afterwards, a viscous, dark red gelatinous substance, radiating extreme high temperature, appeared. It seemed as if magma was flowing inside, and its flashing light caused the surrounding fire attribute energy to boil.

Eighth-tier material, Earth Core Flame Marrow.

Finally, there was a single horn, about a foot long, glowing with a purple light, and with an extremely sharp tip. Purple patterns were wrapped around the horn, and a deep, mournful lion's roar could be faintly heard emanating from it, exuding a fierce aura.

The peak of the seventh tier, the unicorn horn of the Amethyst Winged Lion King.

Lu Yu's gaze swept over the three materials before him, finally settling on the unicorn horn. Of the three, this item was decent, but it was slightly inferior in both rarity and quality.

His mind stirred slightly as he recalled the records about this ancient altar of Yang Fire: "If I remember correctly, there should be a core fire pearl nurtured deep within the earth's eye beneath this altar. I wonder what its quality is... If it is of superior quality, it might be able to replace this unicorn as a more core material."

With this in mind, Lu Yu no longer hesitated. He nodded slightly, then closed his eyes. Vast spiritual power surged out from between his brows, like invisible tentacles, carefully probing into the unfathomable black eye.

Beneath the eye of the earth lay an extremely hot and violent world of energy. His soul power pierced through layers of scorching barriers, extending downwards continuously. After an unknown amount of time, at the very core of that fiery vein, his senses suddenly touched upon something!
It was a round bead, about the size of a thumb, completely blood red and crystal clear.

It floats quietly in the hottest magma, slowly rotating. With each rotation, it causes the surrounding massive volcanic energy to fluctuate like tides, as if it were the heart of this volcanic world!
"Earth Core Fire Pearl..."

Lu Yu's heart skipped a beat; he recognized the item. This was a treasure even more precious than Yang Fire, a culmination of countless years' worth of essence from the Earth's core fire veins!

He carefully sensed the vast fire-attribute energy within the fire pearl, and immediately made a judgment: "The energy is solidified, and it can control the earth fire as easily as an extension of its own arm... The quality of this Earth Core Fire Pearl has actually reached the eighth rank!"

"This item is clearly of far superior quality to the horn of the Amethyst Winged Lion King. Using it as a base, and incorporating Meteorite Iron and Earth Core Flame Marrow, the resulting natal sword will undoubtedly have even greater potential!"

Without the slightest hesitation, Lu Yu immediately made a decision.

With a thought, his vast soul power, at the late stage of the Spirit Realm, suddenly erupted. The Earth Core Fire Pearl trembled slightly, then transformed into a crimson stream of light, shooting out from the depths of the Earth Eye and landing steadily in his palm.

A gentle yet incredibly powerful burst of scorching energy instantly emanated from the fireball.

Lu Yu glanced at the materials he had prepared and, without hesitation, retrieved the amethyst winged lion king's horn. In its place was this extremely precious eighth-tier Earth Core Fire Pearl!
"The materials are ready, it's time to begin."

Lu Yu's gaze turned solemn. He took a deep breath and prepared to officially begin forging his natal sword.

According to the tradition, this method consists of three steps: refining the embryo, refining the blood, and refining the spirit.

"Let's complete the first step: embryo refining..."

With a thought, the noble purple-gold Floating Pagoda Flame rose from his palm, and he threw the piece of Fallen God Black Iron covered with crimson patterns and the viscous Earth Core Flame Marrow into the flame.

Half an hour later, the two finally melted completely under the extreme temperature, merging into a ball of scorching liquid that shimmered with metallic luster and the light of magma.

Immediately afterwards, he flicked his finger, and the Earth Core Fire Pearl, which was only the size of a thumb but contained terrifying energy, was precisely shot into the core of the molten liquid!
Several more hours passed, and the three materials, under the continuous burning of the Floating Pagoda Fire and Lu Yu's precise soul control, perfectly fused together, slowly stretching and condensing, eventually transforming into a three-foot-long, crimson-red, unsharpened sword embryo.

Immediately afterwards, Lu Yu forced out a drop of his vital essence blood, containing immense energy, and dripped it onto the blade of the sword embryo. The essence blood was instantly absorbed, and the sword embryo emitted a clear and melodious sword cry, its blade flashing with an incomparably sharp and cold light!

"The sword embryo is complete!" A hint of satisfaction flashed in his eyes, but his expression remained focused.

Without pausing, Lu Yu drew his fingers across his palm and uttered a low shout: "Second step, Blood Refinement!"

As if summoned, surging blood and qi burst forth, pouring entirely onto the crimson sword embryo.

This continued for a full hour. The sword embryo seemed to have a life of its own, frantically devouring the vital energy and blood. The crimson color of the sword body became increasingly deep and vivid, as if it had grown blood vessels and meridians.

As his qi and blood continued to flow into the sword, a mysterious connection was established between Lu Yu and the sword, as if his bloodline was extending. His face was slightly pale, and his aura was somewhat weak.

"The final step, spirit refinement!"

He formed a hand seal, and a bright light shone from between his brows. A highly refined natal soul energy containing the essence of his soul separated out and slowly flowed into the sword embryo.

The sword embryo trembled violently, its internal blood energy and soul energy mingling intensely, emitting bursts of buzzing sounds.

After a few days,

As the tremors gradually subsided, a feeling of perfect control and deep connection arose from the depths of his heart. Lu Yu could clearly sense a nascent "consciousness" settling within the sword, resonating with his own soul.

"Life and destiny are united, the Azure Profound Sword Embryo is complete!" He breathed a long sigh of relief, his tone filled with undisguised joy.

Then, with a flick of his sleeve, the flames vanished instantly.

A longsword, about three feet three inches long, with a deep crimson color and blood-like streaks and golden light flowing along its blade, hovered silently before me. The blade's sharpness was concealed, yet it exuded a chillingly hot and fierce aura.

Feeling the connection to his bloodline and the immense power emanating from the sword, Lu Yu smiled and said softly:
"Eighth-tier peak, top-grade spiritual weapon, not bad. This sword uses Fallen God Profound Iron as its bone, Earth Core Flame Marrow as its veins, and Earth Core Fire Pearl as its soul, gathering the essence of earth fire within it..."

His gaze was fixed intently on the crimson halo and golden specks flowing across the sword's surface. After a moment's contemplation, he spoke aloud:

"Then I shall call you—the Fallen God Sword!"

The sword trembled slightly, emitting a clear and cheerful hum, as if it greatly approved of the name.

In an instant, the sword shone with a brilliant crimson-gold light, and then a condensed crimson beam shot out from the tip of the sword and entered Lu Yu's brow!

Lu Yu's body trembled slightly as a massive amount of information flooded into his mind. A moment later, he slowly opened his eyes, a hint of undisguised surprise and astonishment flashing in them.

"The Earthly Flame Sword Prison is actually... a rudimentary form of divine power?!"

Through the information transmitted by that crimson beam of light, he learned that this newly born natal sword, "Fallen God Sword," contained a trace of the origin of a strange fire due to the core material "Fallen God Profound Iron." Combined with the ultimate fire source of the Earth Core Flame Marrow and the Earth Core Fire Pearl, it had spontaneously conceived a prototype of an extremely powerful divine ability from the very beginning of its formation!
He pondered for a moment, and then suddenly realized.

It should be noted that the method of forging the natal sword he cultivated originated from the forging method of the Azure Profound Sword, the precursor to the Azure Sword Profound Body, which is among the top ten super dharma bodies in the Great Thousand World.

This method is extremely profound, and the natal swords forged from it have unlimited potential for growth. They develop the rudiments of supernatural powers from the very beginning of their forging, which is rare but also reasonable.

"The only regret is that the true supreme divine power is comparable to the Emperor-level combat skill. Even the weakest prototype of this divine power is comparable to the high-level Heaven-level combat skill. Even with the assistance of the Fallen God Sword, it is far beyond my current cultivation level to unleash."

Lu Yu gently stroked the warm blade, feeling the immense power and faint spirituality it contained, his tone tinged with regret.

"However, once I advance to the level of a half-saint, with the powerful battle qi I've cultivated using the Great Floating Pagoda Technique, I might be able to activate it to some extent..."

"Speaking of which, the Endless Fire Domain has a method for forging different types of fire veins, and the Sword Domain has a method for forging natal swords. These Saint-level forces all have their own unique skills. Why didn't we find similar core secret techniques when we simulated the Ancient Pagoda Clan last time..."

"Could it be that their secret technique, which they keep to themselves, is only the Great Floating Pagoda Technique?"

(End of this chapter)