The Great Overlord: Simulating the Future, Dominating Speedrunning

Chapter 225 Thunder Seal Advancement, Mustard Seed Realm!
"The Thunder Emperor of Inner Demons?"

The Thunder Emperor's face froze abruptly, countless complex emotions flashing in his aged pupils—anger, sorrow, regret… ultimately culminating in a sigh that transcended eternity:

"He...has already fallen."

The phantom of the Heavenly Wrath Thunder Emperor trembled slightly, as if it were caught up in some painful memory:
"I advised him back then that the power of the Heart Demon Clan was too dangerous..."

"But he insisted on going his own way..."

Suddenly, the entire Thunder Palace trembled violently, and the runes on the eighteen thunder pillars flickered wildly.

The illusory image of the Thunder Emperor of Heavenly Wrath fluctuated violently, and his voice suddenly turned cold: "He thought he could control the power of inner demons..."

"But little did they know... they had been outmaneuvered by that Demon Emperor from the very beginning!"

As the Heavenly Wrath Thunder Emperor waved his hand, a memory screen unfolded in the void—

In the scene, the Demon Emperor's eyes were bloodshot, and countless writhing black lines coiled around his body. He grinned maliciously as he plunged his demonically rune-covered hand into the chest of the Wrathful Thunder Emperor.

"Old friend..."

"This Path of Inner Demons... is the true Path to Heaven!"

Even more terrifying, a terrifying, all-encompassing demonic figure was vaguely emerging behind it! That was the true Demon Emperor, who had already secretly taken over the body!
"The ancient war..."

"He took advantage of my trust to launch a sneak attack, severely injuring this old man..."

"And it even controlled the Heavenly Wrath Beast..."

The phantom of the Thunder Emperor of Heaven's Wrath flickered, his voice carrying endless desolation:

"If I hadn't ultimately self-destructed my physical body..."

"I'm afraid even this remnant soul... will become a puppet of the extraterrestrial evil race!"

"Roar--!"

As if to confirm this past event, the ancient bronze coffin, which was suppressed by nine chains of thunder dragons, suddenly began to shake violently inside the hall, and the painful roar of some kind of ferocious beast could be faintly heard...

It was the Heavenly Wrath Beast, constantly being corrupted by the seeds of inner demons!

"Om..."

The Supreme Heart Demon Seal, which was suspended to the side, suddenly shone brightly with silver light, and mysterious lightning patterns appeared on its body. This peerless sacred object, which had accompanied the Heart Demon Thunder Emperor throughout his life of battles, trembled violently and let out a mournful cry, as if it was grieving for its master's fall.

"Ugh……"

The Heavenly Wrath Thunder Emperor sighed, and then the Heart Demon Seal suddenly transformed into a silver stream of light, directly piercing into Lu Chen's brow. The instant the seal entered his body, countless fragments of memory flashed through Lu Chen's mind—

The initial joy of the Thunder Emperor, the Demon King, in crafting this seal...

The past when I drank and discussed philosophy with the Thunder God of Heaven's Wrath...

The unwavering determination to finally retreat and refine the seed of inner demons...

"I see……"

Lu Chen gently touched his brow, feeling the fragments of memory constantly being transmitted from the inner demon imprint within his body. Perhaps, its current actions... meant it had truly acknowledged him as its master?
"Since you have already obtained the Supreme Heart Demon Seal, you must have also received a part of the inheritance from that Heart Demon guy. You can learn from it, but please do not try it rashly."

"Senior, don't worry."

Lu Chen's expression turned solemn as he felt the waves of energy emanating from the Heart Demon Seal. Although the inheritance contained in those fragments of memory was powerful, it was far inferior to a profound technique like One Qi Transforms into Three Pure Ones.

"I know what I'm doing."

He made a grasping motion with his right hand, and the Heavenly Emperor Sword materialized in his palm. Eight-colored spiritual flames intertwined on the sword, completely incinerating the demonic energy surrounding the bronze coffin.

"The Path of Inner Demons..."

"It's nothing more than a stepping stone on my path to sainthood!"

The words were resounding, like metal clashing against stone. Upon hearing this, the Thunder Emperor of Heaven's Wrath's eyes flashed with lightning, and he suddenly threw his head back and laughed loudly:

"Good! Good! Good!"

"Having this mindset..."

"Why worry that the Great Way cannot be achieved!"

Amidst laughter, the illusory figure of the Heavenly Wrath Thunder Emperor began to dissipate into specks of lightning. But before completely vanishing, he suddenly raised his hand and unleashed a purple-gold lightning seal:
"This is the culmination of my life's work on the 'Only I Am Alone' technique..."

"today……"

"I'll give it to my young friend!"

The moment the lightning seal entered his body, Lu Chen trembled violently! Countless cultivation scenes flashed through his mind—

The key to tempering the body with lightning...

The quest for physical sanctification...

Even... a secret method to combat the seeds of inner demons!

"Roar--!"

At that very moment, with the suppression of the Heavenly Wrath Thunder Emperor gone, the nine thunder dragon chains on the bronze coffin shattered, and a colossal beast, its body wreathed in black and red demonic lightning, broke free of its seal, its scarlet eyes fixed intently on Lu Chen:

"Humanity……"

"die!"

The Thunder Emperor's final words echoed through the void: "Young friend... I beg you..."

Lu Chen slowly raised his head, the eight-colored fire lotus in his eyes slowly rotating. His right hand rested on the hilt of the Heavenly Emperor Sword, and he took a step forward to face the charging Heavenly Wrath Beast:
"Don't worry, senior..."

"younger generation……"

"Let's send it to its release!"

boom!
Holding the Heavenly Emperor Sword, Lu Chen unleashed a single strike, and wherever the sword passed, eight-colored spiritual flames intertwined to form a dazzling sword rainbow that seemed to split the heavens and earth!
"Shoot-"

Before the sword light even arrived, the demonic lightning surrounding the Heavenly Wrath Beast dissipated. A hint of fear flashed in its ferocious eyes.

"This sword..."

Lu Chen's voice boomed like thunder from the heavens:

"For the sake of Senior Tiannu!"

The sword light surged, instantly piercing the chest of the Heavenly Wrath Beast. Amidst the billowing demonic energy, the faint phantom of a pure, thunderous behemoth could be seen, roaring towards the sky as if released from its slumber…

"For the Thunder Emperor, the Demon of the Heart!"

The second sword swept out, and wherever the blade passed, the countless demonic threads wrapped around the Heavenly Wrath Beast's soul snapped inch by inch as if melting away ice and snow. Amidst the blinding lightning, a twisted demonic shadow was forced to reveal itself—it was none other than the remnant soul of the Heart Demon Emperor, dormant for many years!
"what!!"

The demonic shadow let out a shrill scream, its pitch-black body steaming amidst the lightning. It struggled frantically to escape, but was forcibly refined by the eight-colored spiritual fire power contained within the sword light.

"Human...you..."

The demonic, venomous voice abruptly ceased. As the last demonic thread snapped, the Sky Wrath Beast's massive body exploded, transforming into a shower of shimmering lightning...

call out!
The Supreme Demonic Seal suddenly flew out, devouring all the scattered lightning essence of the Heavenly Wrath Beast. As the last wisp of essence dissipated, a pulsating ball of silver lightning flame hovered in mid-air—it was the Heavenly Wrath Beast's purest innate spiritual fire, the Heavenly Wrath Thunder Flame!
"Buzz!"

The Demonic Seal suddenly trembled violently, bursting forth with a blinding silver light. The ancient runes on the seal began to disintegrate and recombine, each pattern undergoing a transformation under the tempering of lightning.

Even more astonishingly, the Heavenly Wrath Thunder Flame actively merged into the seal, outlining entirely new thunder patterns on its surface!

Seeing this, Lu Chen frowned but didn't stop it, choosing instead to observe the situation. "Boom!"

The entire Thunder Palace trembled violently amidst the raging energy fluctuations, and the ancient thunder array on the dome began to crumble inch by inch. Lu Chen's eyes flashed like lightning as he gazed at the Supreme Heart Demon Seal undergoing its transformation, a hint of anticipation flickering in them.

The ancient seal floated and sank in the silver flames, its surface constantly disintegrating and reforming with the lightning patterns. Heavenly wrathful lightning slithered within it like a serpent, leaving behind profound patterns imbued with the true essence of thunder wherever it passed.

"Om-"

As the final lightning pattern took shape, the entire seal suddenly froze. Then—

Boom!

A silver beam of light shot into the sky, piercing through the array diagram in the dome. The transformed Supreme Heart Demon Seal floated in the center of the beam of light, its body intertwined with lightning and fire, radiating a terrifying pressure that even Saint-level experts would take notice of!
A near-sacred, peerless artifact!
hum-

Lu Chen closed his five fingers, holding the transformed Supreme Heart Demon Seal in his palm. Feeling the vast power contained within, a glint of light flashed in his eyes.

"At the cost of a celestial-grade spiritual fire..."

"In exchange for a near-sacred, peerless artifact..."

"It's worth it!"

It's important to understand that even among the most powerful forces in the Great Thousand Worlds, a Saint-grade peerless sacred artifact is a treasured heirloom. Even super-powerful clans like the Maha Ancient Clan and the Tai Ling Ancient Clan, with their lineages spanning tens of thousands of years, possess only one Saint-grade peerless sacred artifact to suppress their clan's destiny.

Such treasures are often even rarer and more precious than the Saint-grade Heavenly Supreme!
"Though the Heavenly Wrath Thunder Flame is lost..."

He sensed the surging thunderous power within the inner demon imprint, a slight smile playing on his lips: "But the path of cultivation for the Solitary Technique..."

"It's not impossible to find other celestial treasures to replace them."

"And this quasi-saintly seal..."

Lu Chen lightly stroked the naturally formed thunderous holy mark imprinted on his body, his eyes gleaming with a sharp light. This mark, forged from the wrathful thunder flames, was clear evidence of the Supreme Heart Demon Seal's transformation!

"Advancing from a Celestial Grade to a Saint Grade is as difficult as ascending to heaven."

He sensed the surging sacred aura within the Thunder Seal, his voice filled with barely concealed excitement:
"But if we advance one more step from the Quasi-Saint Rank..."

"But it's not impossible!"

The difference is like the vast chasm between going from nothing to something and going from something to excellence. The former requires extraordinary, almost miraculous, fortune, while the latter only requires the simple accumulation of energy.

"The Qiankun Thunder Realm, formed from the fall of the ancient Thunder Emperor, contains an extremely large amount of Thunder Emperor's essence. If the Supreme Heart Demon Seal absorbs a small portion of it, it may be able to complete the final step of its transformation."

Lu Chen put away the Supreme Heart Demon Seal and silently pondered the path ahead.

"Although I lost one Heavenly Wrath Thunder Flame, I still have 40,000 Demon Extermination Points. I will use 30,000 to repair the Heavenly Emperor Sword and use the remaining 10,000 to exchange for Immortal-grade spiritual items. This will be enough to complete the first two stages of the Solitary Self Technique."

"After completing the cultivation, I will go to the Qiankun Thunder Realm, first forging a Saint-grade physical body, then absorbing Saint-grade spiritual fire, and calmly stepping into the Saint-grade realm..."

"As for now..."

Lu Chen flipped his palm, and a ball of purplish-black lightning appeared out of thin air. Tiny spatial cracks constantly appeared and disappeared within the ball of light, emitting a chilling void fluctuation.

A peerless celestial treasure, the Void Thunder Marrow!
This is the treasure that Lu Chen exchanged for with 5,000 Demon-Slaying Points, a rare spiritual object containing the power of space and thunder!
"First, cultivate to the first realm of the Solitary Self Technique..."

His eyes blazed with lightning, and countless fine lightning runes suddenly appeared around his body. These runes moved across his skin like living things, outlining mysterious trajectories.

"Mustard Seed Realm! Open!"

With a loud shout, Lu Chen unhesitatingly slammed the Void Thunder Marrow into his chest.

In an instant, a terrifying thunderstorm erupted within his body, and violent lightning surged from his seven orifices, transforming him into a thunder god.

"boom!"

Amidst a deafening roar of thunder, a tiny black dot, the size of a grain of rice, appeared on Lu Chen's chest. Countless lightning runes surged into it, creating a spatial node. The node was crystal clear, with starlight twinkling inside, as if it contained a miniature universe.

"The first step has been achieved."

Lu Chen's heart stirred, and his hands changed hand seals. The lightning power around him flowed into his body, and the scorching aura was like a roaring angry dragon, raging through Lu Chen's limbs and bones.

"Concentrate!"

He gritted his teeth, channeling his full power into the Solitary Self Technique, forcibly taming the surging lightning within his meridians, guiding it slowly along specific pathways. Every inch of his flesh and blood underwent an astonishing transformation under this tempering—

"Hey!"

Streams of extremely pure blood and qi were extracted and surged towards the newly opened spatial node like a galaxy. The spatial node, like a miniature universe, continued to expand and stabilize under the tempering of lightning.

The vast and pure power of Qi and blood condensed like a vortex, eventually transforming into dazzling Qi and blood stars that floated within the spatial nodes.

"Om-"

Within Lu Chen's body, the spatial nodes roared and spun like miniature universes. The purplish-black Void Thunder Marrow was completely refined, transforming into thousands of streams of lightning that surged ceaselessly through his meridians.

Within the spatial nodes, dazzling celestial bodies of vital energy are slowly taking shape—

The surface of the star is covered with dense lightning patterns...

The power of qi and blood is concentrated at the core...

"Congeal!"

The moment the 365th Qi and Blood Star condensed and took shape at the node, Lu Chen's entire body trembled violently. All the stars lit up simultaneously, forming a profound celestial chart within his body!

"Mustard Seed Realm..."

"Perfection!"

He slowly exhaled a breath of stale air, which contained tiny bolts of lightning. His physical strength at this moment had already surpassed the realm of ordinary, peerless spiritual artifacts!
"It's time to leave..."

Lu Chen's gaze swept over the majestic Thunder Palace, a flash of understanding appearing in his eyes. This Thunder Palace, the legacy left behind by the Heavenly Wrath Thunder Emperor, was itself a rare and unparalleled spatial artifact.

"receive!"

He formed a hand seal, and the aura and starlight on his chest suddenly lit up. The entire Thunder Palace trembled violently, and thousands of lightning runes peeled off the palace body, intertwining in the void to form a profound array.

"Boom——"

With a deafening roar of thunder, the thousand-foot-tall thunder palace rapidly collapsed, eventually transforming into a stream of purple-gold light that entered the spatial node in his chest.

Upon internal observation, the miniature Thunder Palace floated beside the stars, its brilliance mirroring the Supreme Heart Demon Seal. Within the palace, the thunder array operated on its own, continuously refining the body's vital energy.

"As expected of Senior Tiannu's natal artifact..."

Lu Chen gently touched his chest, feeling the waves of energy emanating from the Thunder Palace. Although it was only a Spirit-grade Peerless Sacred Item, the value of this spatial artifact even surpassed that of ordinary Immortal-grade Peerless Sacred Items!

"With this Thunder Palace..."

His eyes suddenly gleamed:
"Second stage cultivation..."

"It can shorten the time by at least half!"

Suddenly, his expression shifted slightly, and he abruptly turned his head to look at the entrance to the Thunder Domain. There, several powerful auras were rapidly approaching, one of which was...

"Futu Xuan?!"

The Supreme Demonic Seal trembled violently within his body, radiating an overwhelming battle intent. A cold smile curled at the corner of Lu Chen's lips:
"Just in time..."

"Perfect, let's give it a try..."

"The limits of this new physical body!"

With a single step, all 365 vital energy stars around him lit up simultaneously. The lightning throughout the entire lightning domain surged and boiled under this aura!
(End of this chapter)