Pale morning light filtered through the narrow stone window, casting mottled shadows across the sparse room. Sengoku woke at his usual time but didn't immediately sit up. He kept his eyes closed, mentally chasing the lingering sensation in his fingertips from the previous night's training.
He raised his right hand. Drawing on the chakra coiled within his core, he channeled a fraction of it to his index finger. A faint, pale-blue thread sprouted from the tip.
Forming the construct still felt sluggish, like forcing rusted gears to turn, demanding absolute mental focus lest the energy immediately disperse. But as the seconds ticked by, the difference became clear.
'Three seconds... four seconds...'
Usually, the chakra would violently destabilize by this point. Today, it trembled fiercely, fighting against dissipation.
'Five seconds.'
With a soft pop, the thread shattered into glowing dust.
Sweat beaded on Sengoku's forehead. Maintaining the thread for just five seconds was a heavy mental burden, but a microscopic ripple of satisfaction cut through his usual apathy. The structure had been undeniably more stable than yesterday. The sluggishness in his control had lessened by a fraction. For Sengoku, this tiny, measurable progression was infinitely more motivating than any hollow words of encouragement.
He threw off his thin blanket and got to work. He pulled his morning rations from the stone storage cubby: strips of dried meat, a puck of rock-hard wheat bread, and a leftover boiled tuber provided by the academy. The food was coarse and flavorless, but dense with necessary calories. He ate mechanically, treating the meal purely as fuel.
Once his stomach was full, he headed to his usual training ground near the academy. The massive, wind-eroded sandstone formations cast long, cooling shadows in the early light, though the desert air was already warming.
He spent the entire morning running through basic physical conditioning. He repeated strikes, blocks, and evasive maneuvers until his clothes were soaked with sweat and his muscles burned in protest. He executed every motion with mechanical precision, ruthlessly wringing every drop of potential out of his six-year-old frame.
By noon, the sun was directly overhead, baking the sand to a blistering heat. Sengoku retreated to his house, chopped up his remaining tuber and dried meat, and boiled them into a quick stew to replace his depleted calories. As he rested, his muscles twitched involuntarily—the natural biological feedback of extreme exertion.
In the afternoon, he shifted his focus from physical endurance to the delicate art of chakra control.
Standing before a relatively smooth vertical sandstone wall, he focused his energy. He gathered chakra at the soles of his feet and stepped upward. It was still a clumsy process. His output constantly fluctuated between too much—which repelled him from the stone—and too little, which broke the adhesion entirely.
Three steps up, the chakra flow stuttered. Gravity took hold, and Sengoku plummeted back into the loose sand.
He stood up, dusted himself off, and tried again. Climb, fall. Climb, fall. It was an endless, grueling loop.
When his legs finally refused to support him, he moved to the shade, chewed on a dry ration bar, and sat in a lotus position to replenish his drained coils. Once he recovered a fraction of his energy, he transitioned back to practicing chakra threads.
The afternoon attempts were noticeably harder. Physical exhaustion was beginning to fray his mental focus. The blue light at his fingertips flickered erratically, snapping around the five-second mark every time. Yet, Sengoku didn't feel a shred of frustration. He treated every single failure as a fresh data point, adjusting his output in an attempt to extend the thread's lifespan by even a hundredth of a second.
When the setting sun finally painted the sky in bruised hues of orange and purple, the oppressive heat began to lift. Sengoku stopped. His chakra was virtually empty, his body battered, and his mind entirely drained. But a deep, anchoring sense of accomplishment settled in his chest. Looking at his scraped hands, he felt that his baseline control over his own energy had fundamentally deepened.
Dinner was another round of flavorless, nutrient-dense academy rations. After eating and scrubbing his bowl, Sengoku lit his small oil lamp.
The yellow halo of light became the center of the dark stone room. He unrolled Basic Puppet Crafting and Maintenance across his desk and pulled out the scratched, heavy metal joint he had purchased at the Wind Market.
Thanks to his enhanced intellect and relentless studying, Sengoku could now easily identify standard puppet components. But the scrap metal in his hand defied conventional logic. The sheer density of its internal structure and the hyper-efficient, non-standard design of its gears went far beyond the foundational theories in his scroll.
Under the flickering flame, he traced the deep gouges on the metal casing, studying the exposed, fractured connection points.
"The routing of these conduction pathways..." he murmured, his finger hovering over a complex groove. "It wasn't designed for fluid motion. It's built entirely for instantaneous, explosive kinetic output."
Curious, Sengoku condensed a needle-thin point of chakra at his fingertip and carefully guided it into one of the exposed, microscopic nodes on the metal block.
Instantly, he met overwhelming resistance. The internal pathways were heavily damaged and jammed with decades of grit. The chakra struggled to move even a millimeter. The metal remained dead and inert in his palm.
But as he pushed his focus to the absolute limit, trying to navigate his chakra through the microscopic labyrinth, Sengoku realized something profound. He could 'feel' the intricate internal blueprint of the mechanism through the resistance.
The true value of this broken scrap wasn't in repairing it to be used as a weapon. Its value was right here, right now. Forcing his chakra through this blocked, hyper-complex internal maze was the ultimate, high-resistance training tool. Every attempt to thread his energy into the broken joint was a masterclass in extreme chakra control.