Chapter 0/Nexulverse

## The past

Millions of years in the past, the story begins when a war erupted between two races: monsters and humans. The humans emerged victorious and managed to seal the entire monster race inside a mountain, which the monsters referred to as 'the underground.'

Several years passed, and the monsters remained sealed. However, a monster scientist named "Nexul" fortunately discovered the knowledge of how to escape the underground using the seven souls that had imprisoned them. He promptly informed the king, earning himself the title of royal scientist.

As more years elapsed, two monsters named Ducky and Hex mysteriously came into existence. They exhibited exceptional knowledge and powers at a very young age, surpassing even the royal guardsmen. Despite this, they struggled to control their newfound abilities. They were rumored to be creations of Nexul, designed to hunt human souls, but only Nexul knew the truth of their origin.

67 years passed, and impatience grew among the monsters, excluding the royal guards and scientists, who became increasingly furious with the king for not making progress in unsealing the underground. Finally, the king decided to reveal the truth: the monsters needed to hunt down the last human soul to unseal the underground.

15 months later, the last human fell into the underground. Every monster who encountered the human was filled with violence and desires for freedom. However, the human displayed kindness and compassion. Tragically, Hex killed the human, carrying their lifeless body to the king. The king was impressed by Hex's swift action and did not hesitate to extract the human's soul, using all seven souls to free the monsters.

The monsters rejoiced but chose to continue living in the underground, as it had become their home. Nexul was proud of Hex for killing the last human, while Ducky harbored jealousy and hatred for not having played a more significant role.

Ducky slammed his arm against a wall in frustration, exclaiming, "Why is he always surpassing me?"

A mysterious voice replied, "Interesting, you emit such a significant amount of hatred."

Ducky, intrigued, asked, "Huh?"

The voice continued, "Let's make a deal. I'll offer you power and authority."

Ducky eagerly accepted the offer.

The entity and Ducky formed a contract, granting Ducky tremendous power. He started killing other monsters upon the entity's orders. Ducky noticed a terrified monster witnessing his actions.

Ducky: "Hmpf, I'll spare you, but I want you to let the king, Nexul, and why not that pathetic Hex know about this."

The monster, trembling in fear, did as Ducky said. As it traveled through Snowdin, it encountered Hex.

Hex: "Greetings-"

The monster kept running, avoiding Hex due to not recognizing him.

Hex: "Huh? That was... oh well."

After the monster reached the king and Nexul, it was extremely tired and immediately informed Nexul and the king, leaving them shocked.

Nexul exclaimed, "What? That damned—"

The king calmed him down, saying, "Calm yourself, Nexul. I will handle this."

The king assigned Hex and his royal guardsmen to stop Ducky from his rampage. Ducky, who had lost his mind, was killing innocent monsters upon sight.

Hex and his comrades immediately found Ducky due to him leaving a trail of monster dust.

Hex asked, "Ducky... Why?"

Ducky replied, "Shut up! You know nothing. With this power, I can finally surpass you."

Hex reluctantly agreed to confront Ducky.

Hex and the guards engaged Ducky in battle, but he effortlessly defeated them, causing Hex to rage uncontrollably. Hex punched Ducky's face, sending Ducky flying into buildings at the speed of light. The entity appeared, teleporting away with Ducky.

Feeling guilty for not delivering justice to his comrades, Hex resolved to defeat Ducky for their sake.

Eleven months later, Hex trained with Nexul, focusing on controlling his emotions, particularly his rage.

Nexul advised, "Remember to control your emotions, such as rage. It can make you reckless and predictable."

Ducky, on the other hand, continued his training and secretive killings to gain more power.

He complained, "He's still surpassing me! I need to train more."

The mysterious voice offered to help him achieve the "AU Jump" ability, which would enable him to travel to different universes and gain more power.

Nine months later, both Hex and Ducky learned the AU Jump ability. When they encountered each other again, but unfortunately, Ducky teleported to another universe to escape.

Hex, frustrated, muttered, "If I hadn't wasted time, I could have captured him. I guess I'll stick with the plan for now."

In a different universe, Ducky had successfully evaded Hex's pursuit, leaving Hex feeling increasingly frustrated. Ducky, on the other hand, was embarking on a journey of unparalleled power and ambition. He explored this new world, utilizing his newfound abilities to their fullest extent. With each monster he defeated, his strength grew exponentially, and his insatiable hunger for power and dominance only intensified.

Back in their original universe, Hex continued his rigorous training regimen under Nexul's guidance. His determination to become strong enough to halt Ducky's relentless rampage burned brighter with each passing day. Hex had learned to harness his powers with precision and control his emotions, knowing that his confrontation with Ducky was inevitable.

One fateful day, Nexul revealed a critical piece of information to Hex, "Ducky has been traveling across universes, gaining more power. You must find a way to follow him and put an end to this madness."

Hex nodded, fully comprehending the gravity of the situation. With Nexul's unwavering support and guidance, he delved deeper into the mysteries of the AU Jump ability. He mastered the art of traversing different universes and harnessed its full potential.

"In the heart of the multiverse, where the boundaries between realities blurred, Hex and the Guardian of Balance prepared for their imminent confrontation with Ducky. Their journey through the vast cosmic expanse had brought them to a realm where the very fabric of existence seemed fragile and malleable.

The universe that Ducky had chosen as his dominion was a swirling maelstrom of chaos and power. His alliance of formidable beings stood at the pinnacle of strength, having conquered countless worlds and amassed unimaginable abilities. Yet, as they reveled in their newfound dominance, they remained oblivious to the encroaching threat from Hex and the Guardian.

Hex's training had honed his abilities to perfection. His control over the AU Jump ability was unparalleled, allowing him to navigate the multiverse with precision. The Guardian, a timeless entity tasked with preserving balance, had shared invaluable wisdom with Hex, teaching him the secrets of harmonizing his powers with the very essence of existence.

As they ventured deeper into the realm dominated by Ducky, they encountered pockets of resistance. Beings from across the multiverse, aware of Ducky's tyranny, rallied behind Hex and the Guardian, forming an unlikely alliance against the chaos that threatened to engulf them all. Together, they forged a bond of unity and purpose, determined to halt Ducky's destructive march.

In the heart of this tumultuous universe, Ducky's power knew no bounds. He had harnessed the energy of countless worlds, becoming an entity

## The past / 20 years

Twenty years have passed since the tumultuous events in the underground. Much has changed, and the story continues with a new chapter.

The monsters had adapted to their newfound freedom over the past two decades. They flourished in the underground, building a thriving society beneath the mountain that once held them captive. Trade, culture, and technology had progressed, and it had become a place of wonder and innovation.

Nexul, the royal scientist, continued his groundbreaking research. He had made significant discoveries that expanded the monsters' understanding of the universe. With the aid of advanced technology, they had established communication with other worlds, fostering diplomatic relations and cultural exchanges.

Ducky, once consumed by jealousy and hatred, had undergone a transformation. After being separated from the mysterious entity, he had taken a path of redemption. Driven by guilt and a desire to make amends, he had dedicated his life to protecting his fellow monsters. Ducky had become a guardian of the underground, and his powers were now used to maintain peace and security.

Hex, on the other hand, had grown into a wise and respected leader. His journey to different universes had brought him wisdom and experiences that had honed his character. He served as a diplomat and representative of the underground, working tirelessly to strengthen alliances and maintain harmony among the multiverse.

The mysterious entity that had once granted power to Ducky had not disappeared entirely. It lingered in the shadows, observing the changes in the underground. It had learned from its past actions and sought to make amends as well. The entity had become a source of knowledge, offering guidance and counsel to those who sought it, all in an effort to balance the scales of power.

One day, a disturbance in the multiverse threatened to destabilize the delicate peace that had been achieved. A rift had opened, connecting the underground to a realm of darkness and chaos. The underground's inhabitants were faced with a new challenge, one that would test their unity and strength.

Ducky, Hex, Nexul, and the entity joined forces to investigate the rift. As they delved into the unknown, they discovered a formidable adversary, a being of unparalleled power that threatened to engulf their world in darkness. It was a being born of their past, a remnant of the war between monsters and humans.

The underground's survival now depended on the bonds forged over the years. Ducky, Hex, Nexul, and the entity must confront their own past and work together to prevent the impending catastrophe. The fate of the underground and the multiverse hung in the balance, and the legacy of their actions would shape the future for generations to come.

In the heart of this new crisis, the underground's inhabitants rallied once more, proving that unity and resilience could overcome even the greatest of challenges. As they faced the looming darkness, they held onto the hope that had sustained them for twenty years, knowing that their combined strength would lead them towards a brighter future.

## The past /30 years

Thirty years have passed since the events of the previous chapter. The underground had continued to thrive and evolve, but it was not without its share of changes and challenges.

Nexul, the brilliant royal scientist, had passed away, leaving behind a legacy of knowledge and innovation. His contributions had laid the foundation for the underground's progress, and his memory was honored by all. The underground had become a hub of scientific exploration, with new generations building upon Nexul's work.

The king, too, had succumbed to old age, and a new ruler had taken the throne. The underground's governance had transitioned smoothly, maintaining the principles of equality and fairness that had been established over the years.

Ducky, who had once walked a path of redemption, had become a revered figure in the underground. His transformation from a harbinger of chaos to a guardian of peace had inspired many. Ducky's leadership had been instrumental in maintaining the stability of the underground, and his powers had been used to protect and defend the realm from external threats.

Hex had continued his role as a diplomat, representing the underground in the multiverse. His wisdom and experiences had made him an invaluable asset in maintaining diplomatic relations with other worlds and ensuring the continued prosperity of the underground.

The entity, which had once been a source of power and later wisdom, had continued to offer its guidance to those who sought it. Its presence had become a symbol of balance and unity, a reminder of the underground's journey from darkness to light.

However, the peace that had been established was not without challenges. New generations of monsters, born into a world where the horrors of the past were distant memories, sometimes questioned the need for vigilance and cooperation. The older generations, including Ducky and Hex, worked tirelessly to impart the importance of unity and the lessons learned from their history.

A new threat emerged, one that tested the underground's resolve. A malevolent force from a distant universe sought to conquer and subjugate all in its path, including the underground. The underground's inhabitants had to come together once more, using the knowledge and wisdom passed down through the generations.

Ducky, Hex, and the entity, despite the passing of time, took on the mantle of leadership once again. They guided the underground in its defense against the looming threat, drawing upon their experiences and the unity that had been the cornerstone of their society.

The battle was fierce, and the outcome uncertain, but the underground's determination remained unshaken. It was a testament to the enduring strength of a society that had learned from its past and embraced the values of peace, unity, and the pursuit of knowledge.

As the underground faced this new challenge, it did so with the knowledge that its history had prepared it for anything. The legacy of Nexul, the sacrifices of the past, and the wisdom of the entity had shaped a society that was ready to confront any obstacle and protect the future it had worked so hard to build.

## The past / 1 month

One month had passed since Hex had mysteriously disappeared. The underground was in a state of concern and anxiety as they searched for their respected diplomat and leader. Ducky, who had once harbored jealousy and hatred, was now the one leading the efforts to find Hex.

Ducky's journey took him through various universes, but his search for Hex proved to be more challenging than expected. Instead of finding his friend, Ducky encountered genocidal beings in these alternate realities, who were bent on destruction and chaos. These malevolent entities sought to attack Ducky, viewing him as an intruder in their domains.

Ducky's encounters with these genocidal beings were harrowing. He found himself in battles against powerful adversaries, testing the limits of his abilities. Despite the danger and adversity, Ducky's resolve remained unshaken. He fought not only to find Hex but also to protect the stability and peace of the underground.

The battles were grueling, but Ducky's transformation from a harbinger of chaos to a guardian of peace had made him a formidable force. He drew upon the lessons he had learned in the past, honing his powers to protect himself and confront these genocidal beings head-on.

While the search for Hex remained ongoing, Ducky's encounters with these malevolent entities had unintended consequences. He had gained insights into the nature of chaos and destruction, and the dark side of power. These experiences challenged his understanding of the balance he had strived to maintain.

Despite the dangers and the toll it took on him, Ducky remained undeterred in his quest to find Hex. His journey through these alternate universes had given him a deeper understanding of the multiverse and the importance of preserving peace and stability.

As Ducky continued his search, he couldn't help but wonder about the fate of his friend Hex and the significance of the challenges he had faced. The underground awaited his return, and the balance that had been maintained for so long hung in the balance.

One month forward, Ducky's determination had only grown stronger, and his pursuit of Hex and the quest to protect the underground remained steadfast. The underground had learned to adapt and overcome adversity, drawing upon the lessons of their history and the resilience that had defined their society.