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

Chapter 248 The Mysterious Elixir Emerges, and Elixir Rain Falls!
Three days later, the stone door to the quiet room slowly opened.

Lu Yu walked out with a leisurely stride, his aura calm and restrained, only his eyes were more profound than usual, faintly shimmering with a silver luster.

The middle-aged man guarding the door immediately stepped forward, his rugged face showing respect: "Brother Lu, the three elders and Miss Ziyan are waiting at Qinglongtan."

This person was none other than Hei Qing, whom Lu Yu hadn't seen in a long time. Lu Yu turned to look at him and realized that his cultivation had reached the peak of Dou Zun, clearly indicating that he hadn't been slacking off these past few days.

"Thank you for welcoming me personally, Brother Hei Qing." Lu Yu returned the greeting with a smile, nodding slightly as his gaze swept over the other party. "Congratulations on breaking through to the peak of Dou Zun."

Hei Qing laughed heartily: "Compared to Brother Lu's achievements, mine is nothing."

The two walked along the quiet path of Dragon Island and soon came to a deep pool shrouded in a bluish mist. The water was as green as jade, and ancient trees surrounded it. The dense energy was almost tangible, creating subtle ripples in the air.

Zi Yan stood quietly by the pool, her purple dress standing out against the blue mist. Beside her stood three elders, Qingshan, Qingmu, and Zhuli, who all turned their attention to Lu Yu upon his arrival.

"All the necessary medicinal materials have been prepared." Elder Qingshan pointed to a stone platform to the side, on which hundreds of jade boxes were neatly arranged. "According to your list, there are a total of 367 ingredients, of which 12 core auxiliary ingredients are all taken from the treasures of Dragon Island and are of superior quality."

Lu Yu glanced at the medicinal herbs that emitted various colored halos and nodded in satisfaction.

"Lu Yu, I'm counting on you this time." Zi Yan walked to his side, her purple eyes filled with sincere trust. "It doesn't matter if we fail. Anyway, we on Dragon Island don't know how to use this Dragon Phoenix Origin Fruit. Keeping it is fine."

Lu Yu turned to her and smiled: "Don't worry, with the abundant energy of Qinglongtan and the top-quality medicinal herbs you've prepared, I'm 70% confident."

Zi Yan readily nodded: "That's good! Now focus on refining pills, the three elders are all waiting to see your performance."

Lu Yu suppressed his smile, and with a flick of his sleeve, the Azure Phoenix Cauldron landed steadily in the center of the Azure Dragon Pool. Emerald green flames of life rose from his palm, gently enveloping the entire cauldron.

Upon seeing this, the three elders tacitly took a few steps back.

Above the Azure Dragon Pool, the wind and clouds began to rise, and the refining of the Ninth-Grade Profound Pill officially began.

……

Lu Yu took a deep breath, adjusted his state, and his mid-stage Heaven Realm soul power surged out like a tide, precisely enveloping the medicinal herbs on the stone platform.

Having gained experience from refining the Dragon and Phoenix Supreme Pill last time, his technique was now even more skillful, and each step was performed smoothly.

Hundreds of medicinal herbs, under the precise control of their spiritual power, transformed into streams of light and were successively thrown into the medicine cauldron. The flames of life gently flowed within the cauldron, perfectly refining the essence of each herb and removing all impurities.

"Such powerful control over the soul!" Elder Zhuli couldn't help but exclaim in a low voice. "To process so many medicinal herbs at the same time without losing control of the heat is truly admirable."

Elder Aoki stroked his beard and nodded, his eyes full of admiration: "What's most admirable is this calm and composed demeanor. It seems that his earlier statement that he was 70% confident was indeed true."

In less than half an hour, all 365 kinds of auxiliary medicines had been refined. The various colored liquids reflected each other in the cauldron, as dazzling as a galaxy, and the aroma of the medicine was refreshing.

Just as everyone thought they were about to move on to the next step, Lu Yu raised his hand and waved it, and a purplish-gold fruit appeared in his palm. The moment the fruit appeared, the energy of the entire Azure Dragon Pool vibrated violently, and ripples spread across the water's surface.

The dragon and phoenix patterns naturally formed on the surface of the fruit exuded a chilling aura, and even from a distance of dozens of feet, everyone could still feel the terrifying power contained within.

"That's the Dragon-Phoenix Origin Fruit?" Hei Qing's eyes widened, his voice trembling. "Just the aura it emits makes my bloodline tremble!"

However, when the Flame of Life enveloped the fruit, an unexpected thing happened—this divine object containing the power of dragons and phoenixes remained completely still!

"How could this happen..." Zi Yan unconsciously clenched her hands, her beautiful eyes filled with worry.

Elder Qingshan looked grave and said in a deep voice, "This is troublesome. The power contained in the Dragon-Phoenix Origin Fruit is too great. It may be difficult to refine it with a single strange fire."

Just as everyone was worried, an even more terrifying energy fluctuation suddenly erupted from Lu Yu's body. The golden holy light of the Floating Pagoda Fire and the pitch-black light of the Netherworld Fire lit up at the same time, and the three different colored flames intertwined and merged above the medicine cauldron, transforming into a cluster of dazzling three-colored flames.

"This……"

The group looked at each other, their eyes filled with shock.

Finally, it was the Second Elder, Aoki, who spoke first, his tone filled with relief and admiration: "It seems that young friend Lu was well prepared, and we were overthinking it."

Elder Zhuli stroked his beard and nodded: "To be able to control three kinds of Saint-level strange fire at the same time, such mastery of fire control is extremely rare even on the entire continent."

A look of pride flashed in Zi Yan's eyes as she said softly, "I've said it before, Lu Yu never does anything he's not sure he can do."

Under the combined scorching of the three-colored flames, the Dragon-Phoenix Origin Fruit finally began to change. The fruit slowly rotated in the flames, and fine cracks gradually appeared on its surface. Drops of purplish-gold liquid seeped out from the cracks, within which miniature dragon-phoenix phantoms could be vaguely seen swirling and dancing.

As time passed, the entire fruit completely melted, turning into a fist-sized ball of purplish-gold liquid. Lu Yu dared not delay and immediately used his soul power to guide the other medicinal liquids to begin fusing.

With a solemn expression, he poured numerous refined medicinal liquids into the cauldron, his hand seals suddenly changed, and a loud shout resounded throughout the heavens and earth: "Power of heaven and earth, heed my command!"

"Come!"

As the shout subsided, the entire world suddenly changed color. Amidst howling winds, endless energy from heaven and earth surged in from all directions, frantically pouring into the cauldron. As the energy continued to gather, a mottled energy storm formed in the sky, emitting a deafening roar.

"Gathering the power of heaven and earth to refine pills, this is the ninth-grade profound pill!"

The Grand Elder of Green Mountain gazed up at the strange phenomenon in the sky, his tone tinged with regret. As the most senior elder of East Dragon Island, he had lived for thousands of years and had once been fortunate enough to witness the refining of a Mystic Pill, though that attempt ultimately ended in failure.

Therefore, he knew better than anyone that the energy of heaven and earth absorbed when refining the Xuan Dan was often impure and mixed, which could easily break the delicate balance between the medicinal properties.

But I wonder how you will deal with this, young friend?

Just as Elder Qingshan was sighing, Lu Yu raised his hand and waved it. A completely black ancient tower emerged from his body and then swelled in the wind, transforming into a colossal object that blotted out the sky.

As the ancient tower slowly rotated, it began to frantically refine the surrounding天地能量 (heaven and earth energy), transforming the originally violent and chaotic energy into incomparably pure liquid energy.

"What is this?" Elder Qingshan's eyes were filled with astonishment. "It can directly extract the energy of heaven and earth?"

Elder Qingmu intently observed the operation of the ancient tower and said in a deep voice, "This thing seems to contain some kind of ancient rhythm. It seems that young friend Lu Yu's opportunity far exceeds our imagination."

Zi Yan stared intently at the ancient tower in the sky, a hint of curiosity flashing in her purple eyes: "I've seen Lu Yu use this big thing to fight before, I didn't expect it could also purify energy, no wonder he's cultivating so fast..."

The ancient black tower slowly rotated in the air, and streams of pure energy poured down like a waterfall from the heavens, continuously flowing into the medicine cauldron. Nourished by this pure energy, the various medicinal liquids within the cauldron began to undergo wondrous changes; their originally distinct radiance gradually merged, emitting a heart-stopping energy fluctuation.

……

More than twenty days passed, and the energy vortex above Qinglong Pool gradually subsided. With the continuous influx of vast energy, the surging liquid energy within the cauldron was rapidly dissolving. And in the center of the cauldron full of liquid energy, a tiny point of light slowly emerged, emitting a heart-palpitating fluctuation.

"Boom!"

The instant that tiny point of light appeared, the once clear sky was instantly covered with dark clouds, and a heavy thundercloud enveloped the entire world. Black lightning, carrying destructive power, swept through the clouds, and the deep, rumbling thunder made everyone present pale with fear.

"This...this is the pill lightning of a ninth-grade Xuan Dan?" Hei Qing stared at the sky, his voice trembling.

Lu Yu raised his head, his gaze burning as he looked at the dense black lightning in the sky. He suddenly flicked his sleeve, and the lid of the medicine cauldron was lifted open. Instantly, an extremely rich medicinal fragrance spread like ripples, enveloping the entire Azure Dragon Pool in an instant.

The fragrance of the medicine seemed to possess a spirit, constantly condensing and sublimating in the air. Eventually, it condensed into beads of different colors, densely falling from the sky like a grand rain of cinnabar!

"Red rain! It's the red rain recorded in ancient books!"

Zi Yan exclaimed in surprise, reaching out to catch several pills and feeling their pure medicinal power.

The three elders exchanged horrified glances, their aged faces filled with disbelief. They could clearly sense the terrifying power contained within the pill condensing in the cauldron; the fluctuations even made these old men, who had lived for thousands of years, feel a chill run down their spines.

The black lightning in the sky had reached its peak, and the thick clouds seemed to be pressing down on the entire Dragon Island, with the lightning pythons darting through them exuding a chilling aura of destruction.

"Boom!"

A deafening clap of thunder suddenly erupted, and black lightning illuminated the entire world, making it flicker between light and shadow.

In that instant, the medicine cauldron trembled violently, and a dazzling pillar of light shot into the sky, piercing straight into the heavens. At the center of the pillar of light, a ball of light resembling an egg slowly rotated, its surface flowing with mysterious patterns.

The beam of light pierced the thunderclouds, instantly triggering a violent surge of lightning. Countless black lightning pythons coiled around it, slamming into the ball of light with earth-shattering power.

"Boom boom boom!"

The continuous thunderbolts caused the entire Azure Dragon Pool to tremble violently, and the water surged into waves several meters high. The ancient dragon clan members of the Void who were watching from a distance retreated, their faces filled with fear.

Lu Yu stood with his hands behind his back, his gaze fixed on the ball of light. He knew that the refining of the ninth-grade Xuan Dan had reached its most crucial moment, and this tribulation was both a test and an opportunity.

Unlike other pills, the Ninth-Grade Profound Pill can only be born after undergoing this tribulation of lightning.

Outsiders cannot help with this, because these elixirs are already divine objects, possessing the power of heaven and earth. They require the power of thunder to make them completely perfect...

Amazingly, under the raging thunderbolts, the luminous egg not only did not shatter, but instead became even more dazzling. The black arcs of lightning flashing on its surface seemed to coat it with a mysterious cloak, and each strike of lightning made the energy within even purer.

Suddenly, countless fine lines appeared on the surface of the egg, and dazzling light burst out from them.

The moment the embryo burst open, an indescribable fragrance of medicine filled the air and condensed into the phantoms of various rare herbs, such as Jade Lingzhi, Dragon Saliva Grass, and Phoenix Blood Flower. Thousands of medicinal shadows filled the sky, creating a spectacular sight.

"call out!"

In an instant, a streak of light shot out through the air at an astonishing speed, heading straight for the edge of Dragon Island. Wherever the streak of light passed, the rich fragrance of elixir almost solidified, leaving a clearly visible trail in the air.

"The Ninth-Rank Profound Pill is trying to escape!"

The three elders of Dragon Island exclaimed in unison, their figures leaping up simultaneously.

As Elder Qingshan's sleeves fluttered, he set up a spatial restriction. Elder Qingmu formed hand seals to activate the Dragon Island Formation, while Elder Zhuli directly manifested a hundred-zhang-long dragon body in an attempt to block the stream of light.

However, the speed of the Ninth-Grade Profound Pill was beyond imagination, and it was about to break through all obstacles and escape from Dragon Island.

(End of this chapter)