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

Chapter 263 Rainbow Scales Achieve Sainthood, The Gentle Queen
"Father-in-law," Lu Yu said, bowing respectfully.

Gu Yuan nodded slightly and took out a jade talisman engraved with mysterious patterns: "This is my token of the Ancient Realm. Holding it allows you to freely enter and exit the Ancient Realm's barrier."

He handed the jade talisman to Lu Yu and continued, "The clan's affairs have been piling up for a long time, and I should go back now."

Lu Yu carefully put away the jade talisman: "Father-in-law, are you leaving already?"

Gu Yuan nodded slightly: "After all, I am the head of the clan. A few months away is enough. The clan still needs me to take charge of the overall situation."

He looked at Lu Yu with deep eyes, "Now that you have broken through to the three-star Dou Sheng realm, it's time for you to come to the Ancient Realm. That girl Xun'er... keeps talking about you every day."

Lu Yu smiled knowingly: "Once I have finished dealing with the matters at hand, I will definitely go to the Ancient Realm to pay a visit."

Gu Yuan nodded in satisfaction, and with a flick of his sleeve, he opened a spatial passage. Before leaving, he turned back and said meaningfully, "Remember, don't keep Xun'er waiting."

After Gu Yuan's figure completely disappeared into the spatial passage, Lu Yu stood alone outside the hall, his fingertips gently caressing the ancient realm token. The warm touch of the jade talisman reminded him of Xun'er's gentle smile, and the corners of his lips unconsciously turned up slightly.

"It seems it's time to prepare for the journey to the Ancient Realm," he murmured to himself, his gaze sweeping across the deepening twilight outside the hall. "But before we go to the Ancient Realm..."

He took out the jade box containing the Black Demon Lightning Seed. Black lightning flickered within the box, emitting a chilling aura. "I need to completely refine this Black Demon Lightning Seed first, so that the Thunder Emperor's Undying Body can advance further. Then I'll prepare some decent betrothal gifts."

"That way, I'll have more confidence when I go to see Xun'er."

Carefully putting away the jade talisman given to him by Gu Yuan, Lu Yu turned and entered the cultivation room. As the heavy stone door slowly closed, he sat cross-legged in the center of the quiet room, placing the jade box containing the Black Demon Lightning Seed in front of him.

"Shoot..."

The moment the jade box was opened, a bolt of black lightning shot into the sky, instantly filling the entire secret chamber with violent lightning power. Strands of black lightning snaked through the air, emitting a chilling crackling sound.

"Such domineering lightning power! This must be at least the lightning seed left behind by a three-star Dou Sheng, right?"

Lu Yu's eyes lit up immediately, and he stroked his chin, saying, "It seems the Thunder Clan intends to make friends..."

Without further hesitation, he formed a hand seal, and the Floating Pagoda flew out from his dantian, firmly suppressing the restless lightning seed. The black lightning surged left and right, but it could not break through the Floating Pagoda's blockade.

"Give me the town!"

Lu Yu gave a soft shout, and the Floating Pagoda suddenly expanded, generating a powerful suction force at its base that slowly drew the black lightning seed into the pagoda. The moment the lightning seed entered the pagoda, the entire Floating Pagoda trembled slightly, and fine lightning patterns appeared on its surface.

Seeing that the lightning seed had been subdued, Lu Yu immediately activated the Thunder Emperor's Undying Body, beginning to guide the lightning power within it. Streams of pure black lightning flowed from the tower, coursing through his meridians and tempering his limbs and bones.

Lightning flashed in the secret chamber, and Lu Yu's figure appeared and disappeared amidst the electric snakes, his aura rising at an astonishing rate.

……

Half a month later,

The door to the quiet room slowly opened.

Lu Yu stepped out. Three dazzling silver lightning patterns appeared and disappeared around him, each flash causing the surrounding space to tremble slightly and emitting a heart-palpitating fluctuation.

"This is the minor completion of the Thunder Body..."

He gently clenched his fist, feeling the surging thunderous power within his body, and a smile involuntarily appeared on his lips. His flesh and bones seemed to contain boundless power, and every inch of his skin flowed with pure black electric light.

"I feel like even a three-star Dou Sheng couldn't withstand a single punch from me..."

Just then, a deafening roar suddenly came from the sky. A dazzling nine-colored pillar of light shot up from the distance, piercing through the clouds. The vast pressure of a saint swept across the world like a tidal wave, causing the entire Tianmu Mountain to tremble.

"This aura belongs to... Cai Lin? Has she broken through to the Dou Sheng realm?"

A look of surprise flashed in Lu Yu's eyes. He immediately transformed into a streak of black lightning and sped towards the pillar of light. Faint lightning marks were left in the air where he passed, lingering for a long time.

After counting the interest,

At the summit of Tianmu Mountain, above the Blood Pool.

A massive nine-colored pillar of light pierced the sky, its dazzling brilliance transforming the entire landscape into a vibrant spectacle. This sudden turn of events shocked and bewildered everyone on Mount Tianmu, who were baffled as to the origin of this nine-colored pillar of light.

"This kind of pressure..." Venerable Tianhuo and other elders of the Spirit Treasure Pavilion stared at the pillar of light with astonishment and disbelief in their voices, "Is someone breaking through to the Dou Sheng realm?"

"boom!"

Under the astonished gazes of countless people, cracks suddenly appeared on the surface of the nine-colored pillar of light, and then it exploded with a deafening roar. A colossal nine-colored python, nearly a thousand feet long, soared into the sky, its powerful form causing everyone to gasp in shock.

The giant python coiled in the air, radiating a suffocating aura. Its nine-colored scales shimmered brilliantly in the sunlight, each one containing terrifying energy.

Immediately afterwards, with a flash of dazzling light, under the gaze of countless astonished eyes, the giant python's massive body began to shrink, eventually transforming into a graceful and exquisite silhouette.

As the light in the sky gradually faded, the figure finally appeared clearly before everyone's eyes. Her beauty was aloof yet possessed an innate allure; every smile and gesture exuded a captivating, almost devastating charm.

Upon seeing that breathtakingly exquisite face, the hearts of countless people present involuntarily quickened. The nine-colored snake pattern between her brows seemed to shimmer with a mysterious radiance, adding to her dangerous yet alluring aura. Such beauty was truly the most captivating creature in the world.

"Peak of the Three-Star Battle Saint..."

Venerable Tianhuo and the others gasped in unison, their voices filled with disbelief and shock.

With such cultivation, he is already a top-tier figure in the Central Plains.

Cai Lin slowly opened her beautiful eyes, nine-colored light swirling within them. Her gaze swept over the crowd below, finally settling on Lu Yu, who had just arrived. The instant their eyes met, a slight smile curved her lips, blooming into a smile that could eclipse the heavens and earth.

"You came?"

……

Not long after, in the pavilion master's bedroom on the top floor of Lingbao Pavilion.

"Um……"

The magnificent bedchamber was filled with an enchanting atmosphere. An exquisite embroidered gold bodice was casually draped over a sandalwood screen, and sheer stockings covered the white jade couch.

Cai Lin leaned lazily against Lu Yu's chest, her light gauze dress draped loosely over her shoulders, revealing her beautifully shaped shoulders. Her fingertips unconsciously twirled around Lu Yu's clothes, her eyes sparkling with a rare languid charm: "This breakthrough went much more smoothly than I expected."

Lu Yu gently stroked her cascading black hair and smiled, "A three-star Dou Sheng peak, at this rate, even the geniuses of the eight ancient clans would be ashamed of themselves."

"How can the bloodline of this king be compared to that of ordinary people?"

Cai Lin slightly raised her chin, revealing her long, slender, snow-white neck. Her tone carried an innate arrogance, but her gaze towards Lu Yu was gentle as water. She leaned closer to him and whispered, "However... if it weren't for the Supreme Pill you gave me before, things wouldn't have gone so smoothly."

A smile flashed in Lu Yu's eyes. He gently stroked her fair cheek with his fingertips, feeling the delicate and soft touch, and chuckled, "It is my honor to have Her Majesty the Queen say such things."

Upon hearing this, Cai Lin rolled her eyes at him, her gaze filled with a hint of reproach: "Stop being so smug." Despite saying this, she did not dodge his touch, but instead gently rubbed her cheek against his palm.

If the elders of the snake-people were to see this girlish demeanor, they would be utterly astonished. Who could have imagined that the once ruthless and decisive Queen Medusa would have such a gentle side?
Seeing her like this, Lu Yu couldn't help but laugh and lean down to give her a gentle kiss on the lips.

"Hmm..." Cai Lin gently pushed his chest, her eyes filled with a hint of shyness, "When...when will you tell Xian'er about us?"

Lu Yu gently stroked her flushed cheeks with his fingertips and said softly, "Let's wait a while. We'll find a suitable time after she finishes her seclusion this time."

Cai Lin nodded slightly, buried her face in his neck, and whispered, "That's fine..."

……

After several days of passionate intimacy, the palace was filled with an enchanting atmosphere.

That morning, Cai Lin was leaning lazily in Lu Yu's arms when suddenly her expression froze, and a hint of surprise flashed in her beautiful eyes.

"What's wrong?" Lu Yu keenly noticed her change and asked with concern.

A faint blush rose on Cai Lin's cheeks as she sensed the unusual fluctuations in her spiritual veins and whispered, "My spiritual veins... seem to be about to advance."

Lu Yu was taken aback at first, then a look of joy appeared on his face.

The Supreme Scroll of the Great Emperor's Inner Classic they were cultivating was the second stage, which required both of them to reach the Supreme Realm simultaneously.

These days, they were inseparable, not only in their tenderness but also unconsciously practicing this profound technique. They just hadn't expected that, catalyzed by the Yin and Yang energies, Cai Lin's spiritual veins would advance so rapidly.

"It seems that the effects of my training these past few days have been even better than I expected."

Lu Yu chuckled and took her hands in his, his fingertips gently stroking her slightly warm palms. "In that case, let's go all out and help you break through."

Upon hearing this, Cai Lin took a deep breath, a resolute glint in her beautiful eyes. She gently grasped Lu Yu's hand, and nine-colored rays of light flowed from within her, gradually merging with the golden light emanating from Lu Yu's body.

Two beams of light slowly swirled within the palace, like two agile dragons, finally converging at the point where their palms touched. Lu Yu could clearly feel that the spiritual veins within Cai Lin's body were undergoing a wondrous transformation; the originally chaotic energy within her body was now becoming increasingly solid and pure, as if it had been refined through countless trials.

"Relax and follow my guidance," Lu Yu whispered in her ear, the warmth from his palm growing increasingly intense.

Cai Lin nodded slightly, closing her eyes to concentrate. The level-three spiritual vein within her body, forged from the foundation of the Ice Soul Frost Flame, was undergoing a transformative change under the nourishment of Yin and Yang energies.

The originally icy blue spiritual vein shone brightly, and fine cracks appeared on its surface, as if some more powerful being was about to emerge from its cocoon.

……

(End of this chapter)