The first visible manifestation of his evolution was in his eyes. One morning—if such a thing could be said in a place without a sun—while he was "playing" with currents of energy, he saw his reflection in a crystalline surface he had shaped himself. His blue eyes had transformed. They were no longer simply blue, but contained a kaleidoscope of colors—swirls of azure and violet, dotted with shimmering stars, as if the entire galaxy had settled within his pupils. These were the Eyes of Infinity.
With these eyes, he saw beyond the visible. He perceived flows of energy, potential, the fundamental structures of the dimension itself. He could see the very essence of creation and destruction blending in an eternal dance. These eyes were not merely tools of perception; they were a gateway to absolute control.
Next came the transformation of his body. The limitless energy of the dimension infused every cell, every atom of his being. His physique surpassed all known limits. He was no longer just a child; he had become a manifestation of energy itself. His strength was immeasurable, capable of reshaping the dimension with a mere gesture. His speed defied perception, allowing him to move instantly across the expanse. Pain, hunger, fatigue—all had vanished. He was a being of pure vitality, beyond even the comprehension of the Ōtsutsuki.
Through instinct and experimentation, he learned to manipulate the very concepts of existence:
Life and Death:
He discovered he could infuse energy into inert forms and grant them life, or withdraw it to return them to nothingness. A simple motion of his hand could make ethereal flowers bloom or wither in an instant.
Time:
The energy flows obeyed his will. He could accelerate the movement of luminous particles, slow them to stillness, or even reverse their course—molding time like clay.
Creation and Destruction:
With a single thought, he could materialize entire landscapes made of light and energy—shimmering mountains, rivers of stars—or dissolve them with a breath.
Chaos and Order:
He could shatter even the most stable energy patterns, turning them into chaotic spirals, or reorganize them into perfectly harmonious structures.
Space:
The vastness of the dimension became his playground. He could teleport in the blink of an eye, fold space to bring distances together, or create pockets of reality.
Elemental Laws and Gravity:
There were no classical elements in this dimension, but he learned to manifest them from raw energy: fire in its purest form, water as luminous liquid, wind that made energy filaments dance. He could reverse gravity, create force fields that repelled or attracted.
Despite this overwhelming power, Kaien remained joyful, friendly, and helpful by nature. He had never known hatred, fear, or greed. His solitude was not a burden—it was an opportunity for exploration and discovery. He created miniature worlds, populated them with energetic creatures of his own making, and played with the laws of the universe with disarming innocence. He laughed often—a light, melodic laugh that seemed to make the dimension itself resonate.
He did not seek power for its own sake, but for the joy of creation and wonder. His curiosity was insatiable. He explored the furthest reaches of his dimension, never finding its limit. He grew—not through the biological rhythms of the human world, but by absorbing more and more of the essence of infinity. He was the child of this dimension, its master, and its embodiment.
Years, as humans would define them, passed. Kaien, now appearing as a teenager—though his true age was impossible to measure—felt a change. A subtle pulse, distant yet persistent, echoed deep within his being. It was a call, a familiar whisper, the signature of an energy he instinctively recognized: chakra. His chakra, linked to that of his origin world, acted like a magnet. The connection, faint since his arrival, was strengthening—pulling him toward an unknown destination.
He felt a gentle melancholy at the thought of leaving his infinite "home," but also a new excitement. He had always been alone here. What awaited him on the other side of this growing connection? The world he came from was calling him. Without even knowing it, he was about to return at the exact moment when another Uzumaki—a boy with blond hair and blue eyes like his own—was preparing to take his exam at Konoha's Ninja Academy.
A rift, thin as a scar of light, began to open in the luminous vastness. Kaien gazed at it, his Eyes of Infinity shining with intense curiosity. He did not hesitate. With one final look at the dimension he had shaped, he leapt toward the tear in space—ready to rediscover the world that had forgotten him.