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

As the aura of the Lord of Demonic Sound dissipated into the sky, the Heavenly Sound Realm returned to tranquility. The Vermilion Bird, enveloped in seven-colored flames, transformed into a stunningly beautiful woman. Her phoenix eyes narrowed slightly, and a hint of arrogance graced her lips. She sized up Lu Lingxi Yao, "Although... you defeated the Lord of Demonic Sound, you are still far from being able to subdue me, a divine beast of the Nine Heavens who has existed for ten thousand years."

Lu Lingxi Yao remained calm, a faint smile playing on her lips. "If Senior Zhuque is not convinced, how about we have a friendly spar?"

A hint of surprise flashed in Zhuque's phoenix eyes, followed by a cold laugh, her voice clear and cold as a spring, "What an arrogant little girl! Today I'll show you what the true power of a divine beast is!"

Before she finished speaking, flames surged around her, instantly transforming her into her true form. She unfurled her seven-colored wings, each feather radiating dazzling light, illuminating the entire Heavenly Sound Realm as if it were a fairyland.

Lu Lingxi Yao remained expressionless, her slender fingers gently caressing the jade flute. The power of the Nine Heavenly Music Score surged within her. The moment the flute sounded, the notes in the world seemed to come alive, dancing to her melody. The Vermilion Bird flapped its wings, and countless flames transformed into sharp blades, pouring down.

The sound of the flute suddenly changed, the heavenly sound and demonic energy perfectly merging into a captivating demonic sound. The blazing fire blades quickly melted under the impact of the sound waves. Zhuque let out a surprised exclamation, a hint of astonishment flashing in her phoenix eyes, "I didn't expect you to be able to neutralize my attack so easily."

"Interesting." The Vermilion Bird's eyes burned with fighting spirit, and its voice carried a hint of excitement. "In that case, I'll show you the true power of the Nine Heavens Divine Beasts!"

She let out a loud phoenix cry, which shook the void. Seven-colored flames swirled in the air, transforming into mysterious runes that wove together a massive fire array. Flames rose from the center of the array, and the temperature increased accordingly.

However, Lu Lingxi's flute playing became increasingly ethereal and clear. The sound of the Heavenly Demon transformed into sound waves, colliding with the raging flames. The two forces surged within the Heavenly Sound Realm, causing the Milky Way to reverse and the sun and moon to lose their light.

Just as they were locked in this fierce standoff, Lu Lingxi's spiritual power suddenly surged, and a vast aura burst forth from her body, causing the void to tremble.

"This is... a sign of a breakthrough!" Azure Dragon exclaimed, his eyes filled with disbelief.

Nalan Rongzhi's expression changed, his voice filled with worry and joy, "Yaoyao is about to break through to the Supreme Spirit Realm!"

Before the words were finished, dark clouds gathered in the sky, and lightning snaked around. A purple lightning pillar as thick as a mountain crashed down from the heavens, striking Lu Lingxi Yao directly. The power of this lightning tribulation was so great that even the Vermilion Bird, who had lived for ten thousand years, showed a look of shock.

"This tribulation lightning... is actually comparable to the tribulation of an ancient god!" Zhuque murmured to herself, her phoenix eyes filled with astonishment.

Faced with such a terrifying tribulation, Lu Lingxi remained calm. She gently stroked the jade flute with her jade hand, and the Heavenly Demon Sound transformed into an indestructible barrier, absorbing all the power of the tribulation. However, this was only the beginning. The second tribulation struck down with a bang, ten times stronger than the first, and the lightning contained power enough to destroy the world.

Seeing this, Zhuque's disdain vanished. She suddenly transformed into human form and came before Lu Lingxiyao, her voice filled with sincere admiration, "I am willing to sign a contract with you and become your contracted beast."

"Why did you suddenly change your mind?" Lu Lingxi asked calmly while resisting the lightning tribulation.

"Because you deserve it." Suzaku smiled sincerely. "To remain calm under such a terrifying tribulation of lightning, you are indeed qualified to be my master."

Before the words were finished, the third lightning tribulation descended, this time transforming into a ferocious lightning dragon that roared and pounced on Lu Lingxi Yao. Without hesitation, the Vermilion Bird spread its seven-colored wings and joined the Azure Dragon to protect Lu Lingxi Yao.

Nalan Rongzhi brandished his demonic sword, and demonic energy condensed into a solid barrier. With the combined efforts of the four, they finally withstood the earth-shattering tribulation. After the ninth tribulation, Lu Lingxi Yao's aura changed, and she had broken through to the Supreme Spirit Realm.

Zhuque took the initiative to bite her jade finger and lightly touched Lu Lingxi Yao's brow, "With my blood, I establish an eternal pact. From now on, Zhuque is willing to follow my master by my side, through life and death."

A dazzling seven-colored light flashed, the contract was completed, and Lu Lingxi felt the surge of power within her body, a relieved smile appearing on her face.