Prologue

A million years had passed since Rimuru Tempest's reincarnation, during which he had achieved unprecedented power and knowledge. Yet, with his greatness came an unending monotony. Bored and seeking new purpose, Rimuru cast his gaze upon various worlds until one caught his interest: Earthland, home to the Fairy Tail guild. It was a realm filled with magic, adventure, and, intriguingly, sorrow. One young girl's sorrow drew him in, promising a break from the tedium of his existence.

The Heartfilia estate stood grand and imposing, a testament to the wealth and status of its inhabitants. Inside, five-year-old Lucy Heartfilia played in the garden, her laughter echoing through the halls. Her parents, Layla and Jude Heartfilia, watched from a distance, their smiles filled with love and pride.

As the sun began to set, a foreboding shadow fell over the estate. Unseen by the Heartfilia family, sinister figures crept closer, their intentions hidden beneath dark cloaks. Lucy's laughter was abruptly silenced by a chilling scream from inside the house.

"Stay here, Lucy," Layla instructed, her voice trembling as she handed her daughter a cherished locket. "Whatever happens, stay hidden."

Lucy clutched the locket tightly, her small frame shaking with fear as her parents rushed inside. Peering through the window, she saw her parents confronting the intruders. Their faces, twisted in anger and fear, would be forever etched in her memory.

"You will pay for this intrusion!" Jude shouted, brandishing a sword.

"Foolish," one of the attackers sneered, revealing a cruel, scarred face. "Your wealth means nothing here."

Before Lucy's terrified eyes, the battle erupted. Her father fought bravely, but he was outnumbered and overpowered. With a sickening thud, he fell, blood pooling around him. Lucy's heart pounded in her chest, tears streaming down her face.

"Jude!" Layla screamed, rushing to her husband's side. But her grief was short-lived. The leader of the assailants raised his hand, and a dark energy enveloped Layla, snuffing out her life like a candle.

Lucy stifled a sob, her tiny hands clamped over her mouth. The intruders searched the house, but in their haste, they overlooked the trembling child hidden in the garden. As the last of their footsteps faded away, Lucy crept out, her heart heavy with sorrow and rage.

She knelt beside her parents' lifeless bodies, her small hand reaching out to touch her mother's cold cheek. "Mama... Papa..." she whispered, her voice breaking. "I promise... I'll find them. I'll make them pay for what they did to you."

In his timeless domain, Rimuru sensed the girl's anguish and her fierce resolve. It was a feeling that pierced through his boredom, stirring a long-dormant sense of purpose. This was no ordinary child; her pain and determination set her apart.

"Interesting," Rimuru mused, his curiosity piqued. "This isn't part of the usual timeline. I think it's time for a visit."

Rimuru arrived in the world of Earthland, his form materializing near the Heartfilia estate. He found Lucy sitting alone, clutching the locket, her eyes red and swollen from crying. Despite her grief, there was a fire in her gaze that Rimuru hadn't seen in millennia.

"You seem troubled, young one," Rimuru said gently.

Startled, Lucy looked up to see the blue-haired figure standing before her. "Who are you?" she asked, her voice small and fearful.

"My name is Rimuru Tempest," he replied, his voice soothing. "I couldn't help but notice the pain in your eyes. What happened to you?"

"My... my parents," Lucy stammered, fresh tears spilling down her cheeks. "They were murdered. I don't know who did it, but I remember their faces. I promised myself I would find them and make them pay."

Rimuru knelt beside her, his expression compassionate. "Revenge is a powerful motivator, but it can also consume you. What if I offered to train you? To give you the power you need to achieve your goal, and perhaps even more?"

Lucy blinked, surprise mingling with her grief. "Train me? But... why would you do that?"

"Because I see potential in you," Rimuru said. "And because I believe you can achieve great things, not just for revenge, but for a better future."

After a moment of contemplation, Lucy nodded determinedly. "I'll do it. I'll train with you."

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