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

Chapter 214 Simulation Again: Ancient Thunder Palace, Demon Emperor Resurrected!

Two months later,

In a specially designated alchemy chamber on Donglong Island, the cauldron hummed, and a strange fragrance filled the room.

Lu Yu focused intently, manipulating the purplish-gold Floating Pagoda Flame to nurture the final Nine-Bearded Blood Ginseng Pill. The pill within the cauldron shimmered with light, having reached its perfect state.

"Boom!"

The instant the pill was completed, dark clouds instantly filled the sky above Dragon Island, thick thunderclouds gathered wildly, and nine-colored lightning arcs surged and flashed within them, radiating a terrifying heavenly might—it was the highest-grade eighth-rank pill lightning, the nine-colored pill lightning!
Faced with this tribulation lightning that would make even ordinary Dou Zun pale, Lu Yu was not alarmed but rather delighted. In a flash, he appeared high in the sky, taking the initiative to meet the roaring nine-colored lightning!
"Nine Heavens Thunder Summoning Technique, activate!"

With a thought, he rapidly activated his cultivation technique, causing his pores to open and form countless tiny lightning vortexes. The violent power of the pill lightning was forcibly absorbed into his body, causing no harm whatsoever. Instead, it was cleverly transformed into the purest energy, repeatedly tempering his meridians, bones, fighting spirit, and even his soul.

This was the sixth time in two months that he had drawn lightning into his body. The energy from the lightning he had drawn from refining other eighth-grade pills in the previous five times had already pushed his cultivation to the peak of the five-star Dou Zun, and his soul power had also reached the critical point of the late stage of the Spirit Realm.

At this moment, under the impact of this most powerful nine-colored thunder energy, the solid barrier finally shattered!

An aura several times stronger than before erupted from his body, and his battle qi cultivation suddenly stepped into the six-star Dou Zun realm!

At the same time, his soul power seemed to break free from some kind of restraint, and his perception became clearer and sharper than ever before. With a thought, it seemed to be able to cover the entire East Dragon Island.

After a long while, the thunderclouds dispersed, and the sky returned to clarity. Lu Yu slowly exhaled a breath of turbid air crackling with electricity, feeling the surging power and vast soul force within his body, his eyes gleaming.

"Six-star Dou Zun, peak of the Spirit Realm..."

"To transform the heavenly tribulation lightning into one's own nourishment, such a heaven-defying technique can probably only be possessed by a force like the Ancient Thunder Palace."

He muttered to himself, marveling at the profound mystery of the Nine Heavens Thunder-Drawing Technique.

Overjoyed, Lu Yu also clearly felt that since obtaining the Eight Divine Veins, his battle qi had become increasingly pure and refined, but along with it, the resources required to increase his cultivation level by one star had also increased exponentially.

He made a rough estimate, raising an eyebrow: "At this rate, I'll probably need to absorb at least nine more rounds of seventh-colored pill lightning or higher eighth-grade lightning tribulations before I can push my cultivation to the peak of the nine-star Dou Zun. This path is truly extravagant..."

Suppressing his thoughts, Lu Yu moved slightly, causing a ripple in the space, and in the next moment he silently appeared at Zi Yan's residence.

The little girl was looking at a table full of rare medicinal herbs, her chin resting on her hand, her brows furrowed in a deep frown. These herbs were good, but swallowing them directly would have an unpleasant taste. The moment she saw Lu Yu, she jumped up excitedly as if she'd seen a savior.

"Brother Lu Yu! You've finally emerged from seclusion!"

Lu Yu smiled and ruffled her long hair, then handed her a nine-bearded blood ginseng pill the size of a longan and shimmering with blood color, and a blood-red mortal-transforming pill as red as fire.

"Remember the order, take this Blood Burning Mortal Transformation Pill first."

Lu Yu carefully instructed, "This pill can greatly stimulate your bloodline. The higher the grade of your bloodline, the greater the benefit. I specially added a portion of spirit-nurturing powder to it, refining it into an eighth-grade, seven-colored pill. With your bloodline, taking it will at least increase your strength by three stars."

He then pointed to the Nine-Bearded Blood Ginseng Pill: "This pill is best taken by the peak of Dou Zun, but after you refine the previous pill, your body should be able to withstand its medicinal power. After that, taking this pill will lay a solid foundation for your future breakthrough to Dou Sheng."

Zi Yan held the two radiant pills, radiating immense energy, feeling their powerful attraction to her bloodline. Her large, amethyst-like eyes were filled with joy and emotion.

She suddenly stood on tiptoe, wrapped her arms around Lu Yu's neck, and quickly kissed him on the cheek with a soft "chirp".

After returning to Dragon Island to cultivate in seclusion for a period of time, Zi Yan had grown into a graceful young woman with a slender figure. This sudden intimate gesture surprised even Lu Yu.

"Thank you, Brother Lu Yu! You're the best!"

Zi Yan released her hand, her face slightly flushed, but her eyes remained bright and bold, carrying the straightforwardness unique to the Taixu Ancient Dragon Clan.

Lu Yu snapped out of his daze, looked at the face before him that combined youthful innocence with emerging beauty, smiled helplessly yet indulgently, and ruffled her smooth purple hair again: "Alright, hurry back and refine the pills properly, and strive to fully awaken your bloodline as soon as possible."

"I understand!" Zi Yan nodded vigorously and solemnly put the pill away.

After leaving Zi Yan's residence, Lu Yu found Elder Zhu Li, who was handling clan affairs, and handed him a jade bottle containing three Blood Burning Mortal Transformation Pills: "Elder, these are the pills I promised to refine for your young dragon."

Elder Zhuli sensed the three pills in the jade bottle that had reached the eighth grade and three colors. A sincere smile appeared on his face as he solemnly accepted them: "Young friend Lu Yu's alchemy skills are truly extraordinary! Donglong Island will remember this favor."

"Elder, you flatter me. It's my duty."

Lu Yu returned the greeting with a cupped hand, then his expression turned slightly serious as he spoke, "Now that this matter is settled, I have another request to make. I wonder if the elder would grant it?"

"Oh?"

Upon hearing this, Elder Zhuli smiled warmly and said, "Young friend, you have done me a great favor for Donglong Island. Please speak freely. As long as it is within my power, I will not refuse."

Lu Yu pondered for a moment and said, "This junior wishes to borrow the Void Thunder Pool, a forbidden area of ​​the noble family."

He explained, “I have heard that the Noble Void Thunder Pool is a treasure land that can support the cultivation of Dou Sheng experts. I have a special physique that allows me to draw lightning to temper my body. If I can cultivate here, I am confident that I can raise my cultivation to the peak of Dou Zun within two months by relying on the vast power of lightning within it.”

Upon hearing this, Elder Zhuli's eyes flashed with surprise.

He was well aware of the dangers of the Void Thunder Pool; even on the outer perimeter, the violent lightning was something that ordinary Dou Zun could not withstand.

But considering Lu Yu's amazing performance in absorbing Dan Lei over the past two months, and the amount of help the other party has given to Donglong Island.

After a moment's thought, Zhu Li nodded and said, "Since you have a need, I will make an exception. However, there are great dangers in the depths of the Thunder Pool, so you must not go deep. Even our clan's experts must be cautious."

"Rest assured, Elder, I know my limits and will never take any risks."

Upon hearing this, Lu Yu smiled and nodded.

After refining medicine for some time, he has now exhausted the Spirit-Nourishing Powder on his body. The main ingredients of the eighth-grade pills that can attract seven-colored or higher pill lightning are all rare treasures that are hard to find in the world.

It's clearly unrealistic to think that you can gather enough medicinal herbs to trigger nine high-level pill lightning strikes to break through to the peak of Dou Zun.

Fortunately, the Void Thunder Pool of the Ancient Dragon Clan is a rare thunder holy land in the world. Deep within it, even the Black Demon Thunder, which even Dou Sheng powerhouses must treat with caution, is nurtured. The vast thunder within is sufficient for his cultivation needs.

Thinking of this, a burning desire flashed in Lu Yu's eyes. With the terrifying ability of the Eight Divine Meridians to absorb and refine the energy of heaven and earth, he could completely unleash his power and recklessly draw upon the power of lightning in this Void Thunder Pool.

He was absolutely confident that, with the help of this treasure land at the Dou Sheng level, he would be able to break through to the peak of Dou Zun in a short period of time!
----------------------

Soon after,

Inside a quiet room on Dragon Island,
Lu Yu sat cross-legged, his gaze fixed on the two pills floating in front of him.

One of them, about the size of a longan and shimmering with a bloody hue, was the Nine-Bearded Blood Ginseng Pill he had prepared for himself.

In the past two months, he has refined a total of six pills. Apart from giving Zi Yan one Nine-Bearded Blood Ginseng Pill and one Blood Burning Mortal Transformation Pill, and giving Elder Zhu Li three Blood Burning Mortal Transformation Pills, this last Nine-Bearded Blood Ginseng Pill is for himself.

The other pill, pure white and radiating powerful energy fluctuations, was the Heavenly Spirit Pill he obtained through a simulated exchange last month.

"The Nine-Bearded Blood Ginseng Pill addresses the difficulty of the physical body, the Heavenly Spirit Pill addresses the difficulty of spiritual power... Now, the Supreme Lesser Three Difficulties are only missing the Nine-Turn Ice Purification Pill to aid the soul, and then we can complete the whole set of breakthrough aids."

He was making plans in his mind. He hadn't used up his simulation attempts for the month yet, so he could use them to find the main ingredients for refining the Nine-Turn Ice Purification Pill or directly refine the finished product in the simulation.

"However, plans can change, so we'll have to see how things unfold." Lu Yu composed himself, his expression turning serious, and a thought flickered in his mind. A pale blue light screen quietly appeared before him, and a familiar notification sound rang in his mind:
[Ding! Extracting a simulated identity for the host—]

[One, the gatekeeper of Wanhuang Spiritual Academy—You come from a poor family and were abandoned by your parents at a young age. Fortunately, you were taken in by a kind instructor at Wanhuang Spiritual Academy. Although you have an exceptional talent for spirit arrays, Wanhuang Spiritual Academy does not accept male students. To make a living, you can only temporarily serve as the spirit array guardian of Wanhuang Spiritual Academy.]

[Second, Martial Spirit Academy Student—You are a core student of Martial Spirit Academy, one of the five major academies. You were adopted by an elder of Martial Spirit Academy at a young age and possess exceptional talent in body refinement.]

[Third, Thunder Demon Sect Disciple—You are an outer disciple of the Thunder Demon Sect, a king-level force in the Hundred Battles Domain of the Northern Border of the Tianluo Continent. You grew up in the Thunder Demon Sect and received its utmost cultivation.]

Please make your choice——

"These are all forces with mid-level Supreme beings in charge..."

"Two of them were even simulated..."

Lu Yu stroked his chin, pondered for a moment, and then looked at the last simulated identity.

Although he had experienced both the Martial Spirit Academy and the Thunder Demon Sect, if his memory is correct, the Thunder Demon Abyss within the territory of the Thunder Demon Sect seems to hide the inheritance of the ancient Thunder Palace Heart Demon Thunder Emperor!
That is the legacy left behind by a Celestial Supreme, and its value is far beyond that of ordinary opportunities. Although there will certainly be unimaginable risks, the rewards are enough to drive people crazy.

Moreover, I am no longer the same person I used to be, and it is time to go there again to find out what's going on.

"Fortune favors the bold." A resolute glint flashed in Lu Yu's eyes. "This time, I'll choose a disciple of the Thunder Demon Sect!"

As soon as he finished speaking, he chose the third option without hesitation.

[Selection successful! Identity loading...]

[Simulation begins——]

[In your first year, because your parents were both elders of the Thunder Demon Sect, you were able to join this king-level force in the Hundred Battles Domain. This time, your goal was clear: from the very beginning, you chose to cultivate the introductory foundational technique obtained from the ancient Thunder Palace—the Nine Heavens Thunder-Drawing Technique.]

[In the second year, your cultivation broke through to the Divine Soul Realm. Just then, the Outer Sect Grand Competition began, but you showed no interest in it. Instead, you used your parents' elder tokens to enter the library and devoted yourself to finding a way to awaken your own Thunder Spirit Body ahead of time…]

[In the fifth month, after months of consulting ancient texts, you finally found a clue: to awaken the Thunder Spirit Body ahead of time, one must endure extremely strong lightning stimulation, either naturally awaken it upon breaking through to the Supreme Realm, or consume a Supreme-grade pill called the "Thunder Spirit Pill."]

Knowing you couldn't explain your possession of the Thunder Spirit Body to outsiders, you decided to rely on yourself, employing a two-pronged approach: on one hand, you prepared to venture into the Thunder Demon Abyss to stimulate yourself with the raging earth-shattering lightning; on the other hand, leveraging your experience as a level five alchemist, you began researching the ancient formula for the Thunder Spirit Pill, attempting to deduce a milder, simplified version.

[In the ninth month, drawing upon the inheritance of a top-tier alchemy master and your own years of alchemy experience, and after dozens of deductions and improvements, you finally succeeded in optimizing a simplified formula called "Pseudo-Thunder Spirit Pill."]

Although this pill is not as effective as the original Thunder Spirit Pill in fully awakening the Thunder Spirit Body, it is sufficient to initially stimulate the Thunder Spirit Body's potential, and the materials used in its preparation are relatively easy to obtain.

However, you soon learn that sect rules state that Thunder Demon Abyss is a forbidden area, and only disciples who achieve outstanding rankings in the outer or inner sect competitions are eligible to apply for entry. The time is not yet ripe, so you must wait. You consume a pseudo-Thunder Spirit Pill that you refined yourself, and its medicinal power initially activates your Thunder Spirit Body, significantly enhancing your perception and absorption of thunder energy in the world.

[In the third year, with the help of your newly awakened Thunder Spirit Body and the Nine Heavens Thunder-Drawing Technique, you devoted yourself to cultivation, and your cultivation level rose steadily, successfully breaking through to the Transformation Realm!]

[In the fourth year, your cultivation broke through to the peak of the Heavenly Realm. The Inner Sect Competition finally began. During the competition, you successively used the Heaven-Burning Glazed Body and the Heaven-Burning Spirit-Burning Secret Technique, supplemented by the Great Luo Heavenly Flame Sword and the Four-Star Sword Finger, sweeping aside your peers with an absolute advantage and forcefully winning first place in the Inner Sect Competition!]

[According to the sect's rules, the top player in the grand competition receives a precious Supreme Pill as a reward. However, after receiving the Supreme Pill, you frowned in thought and unexpectedly requested that the reward be exchanged for a Nine-Turn Ice Purity Pill.]

After deliberation, the sect's higher-ups, in light of your extraordinary talent and unique needs, have made an exception and granted your request.

[In the fifth year, you ventured deep into the Thunder Demon Abyss, harnessing the raging earth-shattering lightning within to fully circulate the Nine Heavens Thunder-Drawing Technique to temper your body, successfully breaking through to the Difficulty Realm of Physical Body. Just as you consolidated your cultivation and prepared to leave, a sudden change occurred!]

A blinding flash of lightning erupted from the darkest depths of the abyss, instantly engulfing you. You felt the space around you distort, and the next moment, you were swept into the depths of the Thunder Demon Abyss by an irresistible force.

When you regain consciousness, you find yourself in a magnificent and ancient palace of lightning. Lightning crackles within, filling the air with a chilling aura of majesty. A blurry, ethereal figure of lightning coalesces before you, and an aged yet authoritative voice resounds directly in your mind:

"Younger generation, where did your cultivation technique, the 'Nine Heavens Thunder-Drawing Technique,' come from?"

[You remained calm and composed, saying, "Senior, this technique was something I found by chance in a mountain cave when I was young."]

The illusory figure of lightning remained silent for a moment, seemingly examining the truthfulness of your words. After a long while, the aged voice sounded again, but did not inquire further about the origin of the technique:

"Having received the initiation inheritance of the Thunder Palace, you are destined to follow my path. Reaching this place is also your good fortune. Now, rest assured to accept the inheritance of my master, the Thunder Emperor, the Heart Demon..."

You were secretly delighted, not expecting to attract the attention of the Heart Demon Thunder Palace so easily. You then began to undergo the trials of the Heart Demon Thunder Emperor's inheritance...

[In the sixth year, you begin to face your first trial—the Illusion of Inner Demons. You immerse yourself in this endless illusion, enduring the torment of emotions and desires, ultimately upholding your true self and seeing through the illusions. After a year, you pass the trial and earn the qualification for the "Thunder God's Pool" baptism.]

[Upon entering the Thunder God's Pool, the purest and most potent thunderous energy surged into your body, not only forging your physical form to unprecedented strength, but also allowing your cultivation to naturally break through the Supreme barrier, reaching the Second Rank Supreme!]

[In the seventh year, you entered the second trial, where ten equally powerful lightning spirits launched a relentless attack on you. After a grueling half-month battle, employing various methods, you finally annihilated all the lightning spirits, earning the reward of entering the "Library Pavilion" to choose a lineage inheritance.]

[Afterwards, you entered the library. Faced with a dazzling array of supreme Dharma Body cultivation methods and supernatural powers, you pondered for a moment, skipping over the renowned "Three Yang Thunder Technique," and ultimately chose a soul cultivation method called "Heart Demon Thunder Seed Great Technique."]

[This cultivation technique is rumored to be a supreme-level soul cultivation method created by the Thunder Emperor, the Heart Demon. It takes a unique approach, using the power of thunder to temper the heart demon, transforming the seven emotions and six desires into nourishment for the soul, ultimately reaching the profound state of "the heart demon is me, and I am thunder."]

[In the eighth year, you entered the third stage and began to comprehend the Heart Demon Thunder Stele. This stele contains a profound and mysterious technique created by the Heart Demon Thunder Emperor—the Supreme Heart Demon Scripture. You sat before the stele for a year, finally resonating with the true meaning of thunder within it, comprehending the true essence of "Heart Demon Transformation into Thunder," and were rewarded with a bottle of "Minor Thunder God Pills."]

[Then, you swallowed the bottle of Lesser Thunder God Pills. The pills transformed into a vast amount of energy, propelling your cultivation from the Third Rank Supreme to the Fifth Rank Supreme!]

[In the ninth year, just when you thought this inheritance would end temporarily like the last simulation, and you would have to break through to the Earthly Sovereign level before you could continue to undergo the subsequent trials, an unexpected change occurred!]

[The space around you distorts, and you are forcibly dragged by an invisible force to a hidden altar deep within the Thunder Palace. Before you can react, a terrifying demonic soul, filled with violence and corrosive power, soars into the sky from beneath the altar, heading straight for your consciousness!]

"After waiting for so many years, I've finally obtained a perfect body!" A frenzied thought exploded in your mind. You were horrified to discover that the spirit of the Heart Demon Thunder Palace had already been secretly possessed by a Demon Emperor from the Heart Demon Clan, one of the thirty-two great evil races from beyond the realm!

However, the real crisis has only just begun! Just as you are desperately resisting the Demon Emperor's corrupting influence, another familiar thunderous voice, accompanied by an eerie laugh, resounds in your mind:

"Heh... I have waited far too long for this moment..."

[You are shocked to discover that another remnant soul has suddenly appeared deep within the Thunder Palace, surging frantically towards your sea of ​​consciousness, just like the Demon Emperor, vying for control of your physical body! What shocks you even more is that the cultivation technique this remnant soul is using is none other than the "Heart Demon Seed Thunder Technique"!]

[He's actually the Thunder Emperor, the Demon of the Heart!]

[Only at this moment did you realize that this soul cultivation technique was actually a hidden scheme laid by the inner demon Thunder Emperor to possess your body. The so-called inheritance test was nothing more than cultivating a vessel that could perfectly contain his remnant soul!]

At this moment, your consciousness has become a battlefield of life and death between the remnants of two ancient behemoths. The Thunder Emperor of the Heart Demon Clan seeks to refine your soul with lightning, while the Demon Emperor of the Heart Demon Clan attempts to erode your will with demonic thoughts. Under the frenzied tearing of these two destructive forces, your consciousness, like fragile glass, shatters instantly...

【you are dead! 】

[This simulation ends——]

You can choose one of the following three items.

[One, Nine-Turn Ice-Cleansing Pill]

Second, the Supreme Pill

【Three, the Inner Demon Seed Thunder Technique】

(End of this chapter)