Genius in the whole system: The useless young lady dominates the world

The figure in white looked at Lu Lingxi Yao with a hint of relief in his eyes, "Now that you have grasped the true essence of Heavenly Sound, it is time to tell you the true secret of the Heavenly Sound Spectrum."

Just as Lu Lingxi was about to speak, she suddenly felt the nine volumes of the Heavenly Sound Spectrum within her body vibrate simultaneously. A mysterious power surged into her mind, and countless images flashed before her eyes. She saw the truth behind the birth of the Heavenly Sound Spectrum.

“I see…” Lu Lingxi said softly, “The Heavenly Sound Spectrum is not just a magic artifact, but a manifestation of the Great Dao of Heaven and Earth.”

The figure in white nodded. "Indeed. In ancient times, when heaven and earth were first created, the Great Dao manifested as sound, condensing into nine volumes of celestial music. It can not only play celestial music that can move mountains and overturn seas, but it is also the key to communicating with the Great Dao of heaven and earth."

“No wonder Ye Wuhen and Yunshang are so persistent,” Nalan Rongzhi said thoughtfully.

"Unfortunately, they were wrong." The white-robed figure sighed. "The Way of Heavenly Sound lies in one's own heart. Forcibly seizing it will only result in a backlash."

Just then, a strange movement suddenly came from the depths of Tianyin Valley. The nine mountain peaks trembled at the same time, and a huge spatial rift appeared in the void.

“This is…” Qinglong’s expression turned serious.

"It's a resonance of the laws of heaven and earth," the white-robed figure explained. "The Heavenly Sound Spectrum has recognized you. As the new Lord of Heavenly Sound, you can travel to the Heavenly Sound Realm through this rift."

"The Heavenly Sound Realm?" Lu Lingxi's eyes lit up.

"That is the source of the Heavenly Sound, containing even more mysteries of heaven and earth," the white-robed figure said with a smile. "Go, this is your destiny."

Nalan Rongzhi grasped Lu Lingxi's hand, "I'll go with you."

Azure Dragon also said, "Master, I'll stay with you too."

Lu Lingxi nodded, holding the jade flute, and stepped towards the spatial rift. The nine scrolls of Heavenly Music resonated within her, emitting a dazzling light.

The voice of the white-clad figure sounded from behind, "Remember, the Way of Heavenly Sound lies in one's own heart."

The moment she passed through the spatial rift, Lu Lingxi felt a dizzying sensation. When the scene before her stabilized, she was surprised to find herself in a vast starry sky, with countless musical notes flowing through the void.

"Is this the Heavenly Sound Realm?" she murmured in amazement.

Nalan Rongzhi and Qinglong also looked around. The spiritual energy here was exceptionally rich, and every strand contained the ultimate truths of heaven and earth.

Suddenly, a clear phoenix cry resounded through the sky, and a seven-colored figure flew in from afar, radiating a sacred light.

"It's the Nine Heavens Phoenix—Vermilion Bird!" Azure Dragon's expression sharpened. "Old friend, how did you become the guardian beast of the Heavenly Sound Realm?"

The Vermilion Bird landed in front of the three, transforming into a woman in red, her eyes filled with a hint of mockery. "I'd like to ask you, how could the dignified leader of the Four Divine Beasts willingly become a human's contracted beast?"

Just as Qinglong was about to retort, Lu Lingxi Yao noticed something unusual; Zhuque seemed to be carrying a faint sadness.

"Senior Suzaku," she began, "were you waiting for us?"

Zhuque looked at her with a complicated gaze, "As expected of the new generation of Heavenly Sound Lord, you are indeed perceptive. That's right, I was waiting for you, or rather, I was waiting for someone who could break the seal of the Heavenly Sound Realm."

"A seal?" Nalan Rongzhi frowned.

Zhuque nodded, "The Heavenly Sound Realm was originally a place where the Great Dao of Heaven and Earth manifested, but it was invaded by an evil force ten thousand years ago. In order to seal that force, the Heavenly Sound Spectrum was scattered to various realms, and I stayed here to guard the seal."

"So the Heavenly Sound Spectrum recognizes me in order to break the seal?" Lu Lingxi Yao asked thoughtfully.

“That’s right.” Zhuque’s expression was solemn. “That power is awakening. If it cannot be stopped in time, the world will fall into chaos.”

Before the words were finished, a piercing sound suddenly came from afar, the starry sky trembled, and countless musical notes twisted and deformed.

"It's here!" Suzaku revealed its true form, flames erupting from its body. "The seal is about to break!"

Lu Lingxi Yao immediately took out the jade flute, and the nine volumes of Heavenly Music Score resonated within her body. Nalan Rongzhi held the Demon Sword, and the Azure Dragon also revealed its true form.

An evil power seeped out from the seal, causing the entire Heavenly Sound Realm to tremble. Countless distorted musical notes condensed in the air, transforming into black sonic blades.

"This is demonic sound!" The Vermilion Bird spread its seven-colored wings, and flames rose. "It was this power that corrupted the Heavenly Sound Realm back then."

Lu Lingxi held the jade flute to her lips, and the power of the Nine Heavenly Sounds Scroll circulated within her body. The clear and melodious sound of the flute rang out, dissolving the black sound blades.

"Watch out!" Nalan Rongzhi suddenly shouted. A cloud of black mist surged out of the seal and condensed into a huge phantom. The phantom emitted a piercing shriek.

"It's the Lord of Demonic Sound!" Vermilion Bird said solemnly. "It was it that corrupted the Heavenly Sound back then, and it was only through the combined efforts of me and other divine beasts that we were able to seal it away."

The Azure Dragon roared to the sky, its dragon might sweeping across all directions. "I never thought that after ten thousand years, I would have to join forces with an old friend again."

The phantom of the Lord of Demonic Sound grew increasingly solid, with countless black musical notes swirling around it. These notes contained terrifying power that even distorted space itself.

"Yao Yao, let me help you." Nalan Rongzhi swung his demonic sword, and the black sword energy intertwined with Lu Lingxi Yao's Heavenly Sound Power.

The Vermilion Bird spread its wings and soared into the sky, its seven-colored flames transforming into runes that reinforced the crumbling seal. The Azure Dragon also took to the air, its dragon might shaking the four directions.

Lu Lingxi's flute playing became increasingly ethereal, perfectly blending the power of the Nine Heavenly Music Score. Countless notes condensed in the air, transforming into a dazzling galaxy.

"Now!" Suzaku suddenly shouted, "Use the power of Heavenly Sound to purify the demonic sound!"

Lu Lingxi nodded, and the sound of the flute suddenly became high-pitched. The notes in the starry river burst out with dazzling light, enveloping the phantom of the Lord of Demonic Sound.

However, the Lord of Demonic Sound let out a sinister laugh, and the black musical notes suddenly surged, colliding violently with the Heavenly Sound. The entire Heavenly Sound Realm shook in this terrifying impact.

"Oh no!" Suzaku exclaimed, "Its power is even greater than it was back then!"

At this critical moment, Nalan Rongzhi suddenly stepped forward, his demonic energy surging, "Perhaps, we can try this."

The demonic sword in his hand suddenly emitted an eerie light, and a special power flowed into Lu Lingxi Yao's body.

In an instant, the celestial music and demonic energy merged perfectly, transforming into an unprecedented power. Lu Lingxi Yao's flute playing also changed, possessing both the purity of celestial music and the sharpness of demonic energy.

"This is... the voice of the Heavenly Demon!" Suzaku stared in shock at the scene.

The phantom of the Lord of Demonic Sound began to collapse under this power, letting out an unwilling roar, but it was too late, the Heavenly Demonic Sound had already completely enveloped it.

A dazzling pillar of light shot into the sky, and the phantom of the Lord of Demonic Sound completely dissipated in the light. The Heavenly Sound Realm returned to peace, and countless pure musical notes flowed in the air.

"It's over." Zhuque breathed a sigh of relief. "I never expected that Tianyin could merge with demonic energy and create new power."

Lu Lingxi leaned against Nalan Rongzhi's chest, a tired yet happy smile on her face. "This is our bond, isn't it?"

Azure Dragon smiled with satisfaction as he watched this scene, while pure musical notes shone brightly in the starry sky of the Heavenly Sound Realm, as if celebrating this victory.