As the first light of dawn kissed the horizon, the boy of the Zulter family stirred from his slumber, his mind still reeling from the tumultuous dreams of his past life. With a groan, he pushed himself upright, blinking away the remnants of sleep that clung to his eyelids.

Yet, before he could fully grasp the reality of his awakening, the heavy wooden door to his chamber creaked open, revealing the silhouette of a servant standing in the threshold.

"Up already, are we?" the servant sneered, his voice dripping with disdain. "Don't think for a moment that just because you're the son of this powerful family , you're any better than the rest of us. You'll still nothing but a trash."

The boy's brow furrowed in confusion and indignation at the servant's insolence. Though his memories of his former life as the Demon King were fragmented and distant, the arrogance and authority that had once been his were not easily forgotten.

"Watch your tongue," the boy retorted, his voice laced with a newfound resolve.

But the servant only laughed, a cruel sneer twisting his lips. "Respect? From the likes of you? You're nothing but a lowly servant's son, unworthy of the air you breathe, let alone respect."

With a surge of anger coursing through his veins, the boy's hand shot out, seizing the servant by the collar with a strength that belied his young age. In that moment, the echoes of his past life surged to the forefront of his mind, a reminder of the power that lay dormant within him.

"You dare insult me?" the boy growled, his eyes flashing with a dangerous light. "You will learn the consequences of your actions."

With a swift and decisive motion, the boy cast the servant aside, sending him sprawling to the floor with a cry of shock. And as the servant scrambled to his feet, his expression twisted with fear and desperation, the boy advanced upon him with a purpose that brooked no argument.

In a swift and merciless strike, the boy's hand lashed out, delivering a blow that sent the servant reeling. And as the life drained from the servant's eyes, a cold sense of satisfaction settled over the boy, mingling with the tumult of emotions that roiled within him.

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For in that moment, he realized that he was no longer merely the third son of a noble family. He was the reincarnation of the Demon King, and those who dared to defy him would face the full extent of his wrath.

As the echoes of the servant's final breath faded into the stillness of the chamber, the boy stood amidst the aftermath of his actions, his gaze hardened with resolve. And though he knew that the road ahead would be fraught with challenges and adversity, he was prepared to embrace his destiny as the harbinger of a new era, where the sins of the past would be washed away in blood and fire.

After dispatching the insolent servant and asserting his dominance, the boy, now fully aware of his past identity as the Demon King, called upon the other servants to attend to his chamber. With a commanding tone, he ordered them to clean the room thoroughly, leaving no corner untouched.

Once satisfied that his orders were being carried out, the boy slipped away from the commotion, seeking solace in the quiet confines of another chamber. Here, away from prying eyes, he could focus on his true purpose: to reclaim the power and mastery of his former self.

With a deep breath, the boy closed his eyes, delving deep into the recesses of his consciousness. Drawing upon the ancient knowledge that lay dormant within him, he sought to unlock the secrets of the Heavenly Demon Book, a tome of forbidden sorcery that had once elevated him to the pinnacle of power.

Though his current form was but a shadow of his former glory, the boy was undeterred. With unwavering determination, he immersed himself in the arcane teachings of the book, channeling the mystical energies that coursed through his veins.

Hours turned into days as the boy labored tirelessly, pushing himself to the brink of exhaustion in his pursuit of mastery. And with each passing moment, he could feel the dormant power within him stirring to life, like a slumbering beast awakening from its long slumber.

At last, after what felt like an eternity of toil and struggle, a spark of triumph ignited within the boy's soul. With a surge of exhilaration, he felt the first tendrils of power coalescing around him, a faint echo of the strength that had once made him the undisputed ruler of the continent.

But this was only the beginning. With newfound determination, the boy resolved to continue his training, to ascend once more to the heights of power and reclaim his rightful place as the Demon King.

As he emerged from his secluded chamber, a glimmer of anticipation danced in his eyes. The journey ahead would be long and arduous, fraught with peril and uncertainty. But the boy, now reborn as the vessel of the Demon King's soul, was ready to embrace his destiny and carve his legacy upon the annals of history.