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

Chapter 251 Lu Yu: "I lack nothing!"

"You're welcome, little friend."

Elder Qingshan stroked his beard and laughed loudly, his voice like a booming bell. He exchanged a glance with Elder Qingmu.

Although the two elders' breathing fluctuated slightly, their eyes were filled with undisguised admiration and amazement.

Elder Qingmu took over the conversation, his tone filled with heartfelt emotion: "To be honest, the two of us had already put all our strength into it and barely managed to withstand your final Heaven-Burning Strike. The movement techniques, finger techniques, and palm strikes you just displayed—three mid-level Heaven-rank combat skills—were executed with remarkable ease and fluency in your hands."

"This series of attacks has really put us two old guys through the wringer..."

Elder Qingshan nodded in agreement, scrutinizing Lu Yu with keen eyes: "Not bad. At such a young age, to have such cultivation and combat skills is truly ashamed of us. Given time, you will surely have a place at the pinnacle of the Dou Qi Continent."

Upon hearing this, Lu Yu smiled modestly, not becoming complacent despite the high praise: "You two elders are too kind. I have only had some fortunate encounters. In terms of foundation and experience, I am far inferior to you two. I have also benefited greatly from today's battle."

He knew his own situation best; he understood that these three intermediate-level Heavenly Rank combat techniques were all derived from the combat techniques he had previously mastered, which was why he was able to quickly master them and reach a state of perfection.

For example, the Burning Heaven Seal is a fusion of the essence of the Burning Heaven and Boiling Sea Palm and the Emperor Seal Technique. He had already mastered these two fighting techniques, so it was only natural for him to learn the Burning Heaven Seal. He mastered it in just a few hours and reached the mastery level in a few days.

The other two fighting techniques are also quite similar.

The group exchanged a few more polite greetings on the cloud, creating a harmonious atmosphere.

The two elders found Lu Yu increasingly pleasing to the eye, thinking that this young man possessed extraordinary talent yet remained humble and composed, and his good relationship with Zi Yan made him a true blessing to Dragon Island.

After a moment, Lu Yu bowed again and said, "Elders, I will take my leave now. I need to return to my meditation room to reflect on what I have learned in this battle, and I plan to make a trip to the Void Thunder Pool in a few days to continue studying body-refining techniques."

"Please grant our request, Elders."

Elders Qingshan and Qingmu exchanged a glance, smiled at each other, and said gently, "Young friend, please feel free to do as you please. If you need any of the resources of Dragon Island, please let us know."

Lu Yu nodded, said no more, and his figure blurred into a streak of light, disappearing into the end of the sea of ​​clouds in an instant.

……

Soon after,

The Void Thunder Pool, this forbidden zone of thunder located in distorted space, roars and surges as always.

Lu Yu's figure did not linger at the edge, but appeared directly in the inner area of ​​the Thunder Pool.

The lightning here was no longer the silvery-white color of the outer edge, but had transformed into a more violent and profound purple. Every flash of lightning carried a destructive power that was enough to make even a peak Dou Zun expert pale.

However, for Lu Yu, who had once been tempered here, this purple lightning, powerful enough to tear mountains apart, seemed rather docile. He sat cross-legged in mid-air, his pores opening, naturally drawing the surrounding violent lightning power into his body.

The dazzling lightning danced and flickered on his body, emitting a series of low rumbles, but it could not penetrate the skin that was flowing with a shimmering light. Instead, it was slowly absorbed by the skin and turned into resources to temper his body.

A moment later, Lu Yu slowly opened his eyes, a flash of lightning appearing in them. He felt the slight increase in his physical strength and gently shook his head.

"The intensity of the lightning here is no longer sufficient."

He stood up, his gaze fixed on the deeper parts of the Thunder Pool. Without the slightest hesitation, Lu Yu took a step forward, his figure transforming into a streak of light, breaking through layers of thunder curtains, and rushing towards the core area that harbored even more terrifying power.

He didn't know how long he had traveled, but the surrounding lightning had turned into a deep black, filled with a destructive aura. However, Lu Yu still felt that he had not reached the limit of his own endurance.

His gaze was piercing, penetrating through layers of lightning to reach the very core of the lightning pool. There, light seemed to be swallowed up, presenting an absolute darkness and deathly silence.

Just as he was about to delve deeper, a thought suddenly struck him!
At the very edge of that deep darkness, he keenly sensed a completely different kind of lightning power—

It wasn't a vast, overwhelming sea of ​​lightning, but rather individual streaks of black lightning. They weren't enormous, but they were incredibly condensed, their entire bodies as black as ink. As they meandered and moved about, they were silent, yet they exuded a terrifying power that caused the surrounding space to constantly collapse and recombine!
"This is... Black Thunder?!"

A startling light flashed in Lu Yu's eyes. He naturally recognized the object; in fact, he had seen it many times before.

This is a rare lightning that only appears when a ninth-grade elixir is produced, and its power is enough to threaten even a Dou Sheng powerhouse!
Unexpectedly, deep within this Void Thunder Pool, there exist so many Black Demon Thunders, seemingly forming their own distinct race!
"Finally... we've found a suitable place for tempering."

A satisfied smile curved Lu Yu's lips. Far from being afraid, he was filled with anticipation. He adjusted his breathing and then, without hesitation, took a step towards the Black Demon Lightning Domain, which was filled with an aura of extreme destruction!
This step felt like stepping into the lair of thunder.

The black lightning that had been slowly drifting in the void suddenly surged violently, like a swarm of snakes awakened!

Rumble!
Dozens of jet-black lightning bolts, carrying the will to destroy everything, transformed into a sky-covering net of lightning, slashing towards Lu Yu. The terrifying power gathered together caused the entire void to tremble, its energy level comparable to the full-force attack of a mid-level Dou Sheng!
Lu Yu's pupils contracted slightly; faced with such an offensive, he dared not be careless in the slightest.

"Ten Thousand Flames Burning Heaven Sword Formation, activate!"

With a thought, his immense soul power surged forth, and an incredibly complex spirit array instantly took shape in the void!

As the array patterns flowed, countless giant swords formed from flames appeared out of thin air, their blazing flames and crisscrossing sword energy creating an indestructible wall of flames.

The high-grade spirit array of human quality—the Myriad Flames Burning Heaven Sword Array—has a power comparable to a three-star Dou Sheng! With his soul power breaking through to the mid-stage of the Heaven Realm, he has now perfectly mastered this high-grade spirit array of human quality and can set it up instantly.

However, the destructive power of the Black Demon Lightning Swarm far exceeded expectations, and even a high-level spirit array could only barely withstand it!

"Click——"

In just a few breaths, the fiery sword wall began to crack under the strain, and cracks rapidly spread. The sword formation collapsed in an instant!
However, it was this brief moment of obstruction that created an opportunity for Lu Yu!

The pagoda that had already appeared above his head unleashed a vast suction force, precisely targeting the three black demon lightning bolts at the edge of the lightning net the instant the lightning net was blocked by the sword formation.

"receive!"

At the very moment the sword wall shattered completely, the Floating Pagoda, carrying three frantically struggling black lightning bolts, rapidly retracted. Lu Yu didn't hesitate, his figure transforming into lightning as he retreated.

Behind him was a swarm of black demonic lightning, completely enraged and coalescing into a sea of ​​thunder!
"Made..."

Feeling the terrifying destructive energy emanating from behind him, Lu Yu couldn't help but curse under his breath. These black demon lightning bolts were far more troublesome than expected; three were already the limit, and any more would likely be too much for even the Floating Pagoda to suppress.

He used all his strength to move, weaving through the gaps in the lightning. However, the Black Demon Lightning was even faster, and several lightning snakes had already caught up with him!
At the critical moment, Lu Yu unleashed a Heaven-Burning Palm Print. The instant the palm print collided with the Black Demon Lightning, he used the force to accelerate again, while simultaneously activating the Floating Pagoda to repel another Black Demon Lightning bolt that was closing in.

This series of actions was so fluid and smooth that it finally created some distance between him and Lei Qun.

We must leave this dangerous area as soon as possible!

As Lu Yu flew away at full speed, he felt the terrifying destructive fluctuations behind him and couldn't help but smile bitterly: "No wonder the Dean was chased by a group of Black Demon Lightning back then. With so much Black Demon Lightning gathered together, even a mid-level Dou Sheng would have to temporarily avoid its edge!"

His figure moved like lightning, leaving a streak of light in the sea of ​​lightning. Relying on his familiarity with the terrain of the lightning pool and his exquisite movement techniques, he finally managed to shake off the pursuit of the black demon lightning swarm and break out of the lightning pool area after an incense stick's time.

The enraged black lightning roared and churned at the edge of the lightning pool, but seemed to be restrained by some rule, unable to continue its pursuit. Lu Yu breathed a sigh of relief, immediately swallowed several pills, and set up several protective barriers.

……

After a while,

Lu Yu slowly opened his eyes. His fighting spirit and soul had returned to their peak state. He waved his hand to summon the Floating Pagoda and prepared to begin refining the three hard-won black demon lightning bolts.

"Thunder Emperor's Undying Body..."

He silently recited the name of this advanced Heaven-rank body-refining combat technique. This method was a closely guarded secret of the Thunder God Palace, divided into nine realms. Each time a realm was mastered, a divine thunder rune could be condensed within the body.

If one can achieve perfect nine patterns and unify them into a single seed, one can condense the "Thunder Emperor Divine Power Seed". At that time, one's physical body will be comparable to an ancient thunder beast, and one can summon thunder and lightning with every move, with boundless power.

To cultivate this technique, one must repeatedly temper the physical body with the most extreme lightning in the world. These three bolts of black demonic lightning are the perfect resources for cultivating this art.

Lu Yu held his breath and focused his mind, first adjusting himself to his peak condition, then with a slight thought, the Floating Pagoda opened a crack—

"boom!"

A bolt of black lightning shot out, instantly engulfing him. The violent power of the lightning tore at his flesh, and waves of excruciating pain washed over him.

Lu Yu circulated his magic technique, guiding this destructive energy through his meridians with great difficulty. Each impact brought excruciating pain, but it also strengthened his physical body through destruction and rebirth.

Three days later, the first black demonic lightning was completely refined, and a faint silver lightning pattern appeared on his body.

Followed by the second, third...

Half a month later, when the energy of the last Black Demon Lightning had completely merged into his body, Lu Yu's body suddenly shone brightly with lightning. Countless mysterious runes flowed endlessly on the surface of his skin, eventually condensing into a solid lightning divine pattern that disappeared into his flesh and blood.

He slowly opened his eyes, a flash of lightning appearing in his pupils.

"Thunder Emperor's Undying Body, First Stage—Completed!"

Feeling the surging, immense power within him, Lu Yu nodded slightly. Now, with just this physical body, he was more than capable of directly confronting a peak one-star Dou Sheng expert!
"As expected of a secret divine technique passed down by a super power in the Great Thousand World."

He felt the lightning pattern in his chest, imbued with pure lightning power, and couldn't help but sigh softly, "With this body-refining divine technique as my foundation, combined with three fully mastered mid-level Heaven-rank combat skills, and the Great Luo Heavenly Flame Sword as a trump card for slaughter, I have finally made up for all my shortcomings."

"Nothing is missing!"

A hint of satisfaction flashed in his eyes, and then his figure blurred, transforming into a streak of light that streaked across the sky, speeding towards Dragon Island.

It's time to go back and see if Zi Yan has emerged from seclusion.

(End of this chapter)