133: Chapter 133 Situ E arrives, the little girl appears

If an outsider were present at this moment and saw these rays of light, they would involuntarily have their emotions stirred—either overcome with joy, flying into a rage, or filled with sorrow...

But this was not what Xu Ruyu wanted.

He closed his eyes and focused, slowly drawing in the seven-colored light, eventually condensing it in his palm into a mass of chaotic, constantly shifting gray light.

"The seven emotions return to one, this is the 'Chaos Pull'."

Xu Ruyu whispered to himself and gently pressed the gray light toward the center of his brows.

In an instant, he felt all his emotions—the anxiety of waiting, the focus of cultivation, the complex thoughts regarding Xiao Nianyin, the urgency of the Three-Month Agreement—all being absorbed, stirred, and neutralized by this mass of gray light.

His heart became clear and bright, as if he had returned to the state of a newborn infant.

No joy, no sorrow, no worry, no fear.

There was only absolute rationality and calmness.

"This state... is actually suitable for studying the Formation."

Xu Ruyu dissipated the gray light, his mood as still as an ancient well without ripples.

He sat down on the floor of the Ancient Hall of Love and Heaven and took out several Low-Grade Spirit Stones he carried with him—these were specially gifted to him by Elder Mo earlier when he saw that he was "diligent."

The Spirit Stones were laid out on the bluestone floor, forming a crude Spirit Gathering Formation.

But this was only a facade.

Xu Ruyu's true purpose was to deduce an upgraded version of the Acetylene Array.

"The previous Acetylene Great Array used calcium carbide to react with water to generate acetylene, then ignited it with a fire talisman to form a high-temperature flame."

As he set up the Formation, he built a model in his mind: "But the chemical equation for acetylene combustion is: 2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O + heat."

"In this, every two molecules of acetylene require five molecules of oxygen. In a confined space or at high altitudes, insufficient oxygen will lead to incomplete combustion, greatly reducing its power."

"If the Formation could be improved so that it not only generates acetylene but can also simultaneously electrolyze water to produce oxygen and hydrogen..."

Xu Ruyu's eyes lit up.

The combustion heat value of hydrogen is even higher than that of acetylene!

He quickly changed the placement of the Spirit Stones, adding a brand-new "Electrolysis Formation" between the original "Water Hydration Formation" and the "Fire Source Formation."

This Formation was derived from an obscure "Water-Element Lightning Technique Fragment" in the Hall of Power Transmission, which originally used the power of lightning to electrolyze water vapor, producing lightning fire to injure people.

But Xu Ruyu stripped away the offensive parts, retaining only the electrolysis principle.

"The mixed combustion of acetylene and hydrogen... the theoretical maximum temperature can reach over three thousand degrees, nearly double that of a pure acetylene flame."

He muttered to himself, True Qi flowing at his fingertips, outlining complex Formation patterns in the Void Realm.

Time flew by during the deduction.

Unknowingly, another three days passed.

In these three days, Xu Ruyu repeatedly improved, verified, and re-improved the Acetylene Array.

The floor of the Ancient Hall of Love and Heaven was covered in dense Formation diagrams and calculations carved by his True Qi—there were chemical equations, energy calculation formulas, comparisons of Spiritual Qi conversion efficiency...

By the evening of the third day, a brand-new composite Formation finally took shape in his mind.

"Let's call it the 'Hydrogen-Acetylene Heaven-Burning Formation'."

Xu Ruyu let out a long breath, a tired yet satisfied smile appearing on his face.

This Formation integrated four major modules: acetylene generation, water electrolysis, gas mixing, and deflagration control, with power far exceeding the original version.

If it could be fully deployed, even if a Golden Core Cultivator fell into the Formation, they would struggle to escape the fate of being burned to ashes.

More importantly, through these few days of deduction, his understanding of "energy conversion" had reached a brand-new height.

Chemical energy, thermal energy, kinetic energy, True Yuan... these different forms of energy were no longer isolated individuals in his eyes, but a whole that could be mutually converted and recycled.

"Perhaps, this is the true meaning of new energy cultivation..."

Xu Ruyu sat cross-legged, preparing to regulate his breathing and recover his exhausted mental energy.

However, the moment he closed his eyes—a very slight, very childish sound suddenly rang out within the Ancient Hall of Love and Heaven... "Eh?"

Just as Xu Ruyu sat withered for six days in the Ancient Hall of Love and Heaven, focusing on his deductions, the outside of the Hehuan Sect was already surging with undercurrents.

At noon on the sixth day, outside the main gate of the Hehuan Sect.

"Boom—!" Heavy war drums sounded from the horizon, accompanied by a heart-palpitating pressure of Evil Qi.

The gate-guarding Disciples looked up in horror, seeing black clouds rolling in the distant sky, and hundreds of escape lights streaking across the sky like meteors.

The leading blood-red escape light was the most striking; wherever it passed, even the air seemed to be stained with a layer of fishy stench.

"Enemy attack—!" The alarm bell rang long and loud, and the Mountain Protection Array was instantly activated, with a pale blue light screen like an inverted giant bowl, shrouding the entire Hehuan Sect main gate.

But that blood-colored escape light did not stop at all, crashing straight into the light screen!

"Dong—!!!" Amidst the deafening loud noise, the Mountain Protection Array shook violently, ripples surged on the light screen, and there were even faint signs of shattering!

"Who dares to intrude upon my Hehuan Sect?!" Several figures flew out from the depths of the Sect, led by an Elder of the Law Enforcement Hall—a white-haired old woman at the Late Nascent Soul Stage, who now had a grave expression and demanded sternly.

The blood-colored escape light dissipated, revealing the figure within.

It was a nine-foot-tall, shirtless bald giant with a face full of flabby flesh and an eerie blood-colored lotus tattooed on his forehead.

Behind him followed more than three hundred Cultivators with soaring Evil Qi, each with cruel eyes, and the lowest cultivation level was the Foundation Establishment Stage.

"Situ E?!" The white-haired old woman's pupils shrank, "Does your Jile Sect want to start a war with my Hehuan Sect?!"

"Start a war?" Situ E grinned, revealing white, sharp teeth, "I came today to 'visit' an old friend."

His gaze swept over the Hehuan Sect main gate, especially lingering for a moment in the direction of Ningyin Hall, a trace of morbid heat flashing in his eyes:

"I heard that bitch Xiao Nianyin took in a male Disciple? And even let him live in Ningyin Hall? I specifically came... to have a look."

The voice exploded like thunder, spreading throughout the entire Hehuan Sect.

For a moment, all the Disciples were terrified and changed color.

The Jile Sect Old Ancestor Situ E... had actually really come to the door!

Deep within Ningyin Hall, in the secret chamber for power transmission.

Xiao Nianyin opened her eyes abruptly, the light of ice blue and scorching gold intertwined in her eyes flashing violently.

She felt the terrifying Evil Qi outside the main gate and heard Situ E's unscrupulous wild words.

"Situ E..." She slowly stood up, her plain white robe moving without wind, the aura around her body icy and bone-chilling, yet there was a faint, magma-like intensity surging in the depths.

In front of her, Leng Ningshuang also finished today's cultivation, her face slightly pale, clearly also startled by the commotion outside the main gate.

"Sect Master, it is the Jile Sect..."

"This Seat knows." Xiao Nianyin's voice was calm, with no discernible emotion, "You stay here and continue to comprehend the 'Mirror Heart'. The matters outside... This Seat will handle them."

She stepped toward the exit of the secret chamber; with every step she took, frost condensed on the bluestone under her feet, yet beneath the frost, faint magma-like cracks spread.

"Situ E..." A trace of cold killing intent flashed in Xiao Nianyin's eyes.

"The debt from three hundred years ago, today... it is time to settle it."

"As for Xu Ruyu..." Her footsteps paused slightly, looking toward the direction of Tingzhu Peak, her eyes complex for a moment, but immediately returning to coldness.

"If you are smart, you should know... to hide well."

As the words fell, her figure had already disappeared into the secret chamber.

Only Leng Ningshuang was left alone, looking at the empty secret chamber, a strong sense of unease suddenly welling up in her heart.

Outside the main gate, Situ E's wild laughter rang out, shaking the sky:

"Xiao Nianyin! Get the hell out here!"

"Today, either you obediently come with me, or... I will trample your Hehuan Sect, and then extract your soul and refine your spirit, so that you will never be reincarnated for all eternity!"

"Hahahaha—!" Evil Qi soared to the sky, and the winds and clouds changed color.

And inside the Ancient Hall of Love and Heaven, Xu Ruyu had just opened his eyes, the childish "Eh?" still echoing in his ears.

He looked around the empty Ancient Hall of Love and Heaven, his brows slightly furrowed.

"An illusion?"

But the next second, his pupils suddenly shrank.

Because on the bluestone floor three feet in front of him—at some unknown time, a pair of small, embroidered shoes with pink lotus flowers had appeared.