Seeing the intensity of the training continue to rise day after day, a quiet unease began to take shape in my mind.
It was only a matter of time before minor burns would appear, caused by stray bursts of energy that veered off course. A misjudged thrust could result in a deep puncture wound. Additional weapon drills might leave sharp gashes across flesh. A heavy blow could send vibrations through bone all the way to the marrow—hairline fractures and twisted joints already occurring far more often than I was comfortable with.
I did not want their progress to be halted by injuries that could, in truth, be prevented.
In the span of those seven days, during the narrow slivers of rest between training sessions, I created a Cursed Tool designed specifically for healing.
As long as a limb was not completely lost beyond recovery, nearly any wound could be restored—burns that peeled away layers of skin, deep stab wounds, clean weapon slashes, blunt-force trauma, severed limbs, even cracked bones and dislocated joints could return to their original state.
The Cursed Tool took the form of a cylindrical iron drinking bottle. Its surface was plain and undecorated, yet it felt solid and heavy in the hand, its weight reassuring. A persistent coolness lingered within the metal, as though it quietly absorbed the surrounding heat and stored it in silence.
Embedded inside was a network of interconnected curse programs, forming a stable and precise energy-conversion mechanism. Each component was carefully structured, ensuring that the flow of power would not fluctuate or destabilize under pressure.
Every day, the bottle produced clear, transparent healing water. To an untrained eye, it appeared no different from ordinary water. Yet within it flowed structured energy—refined, balanced, and meticulously stabilized—working from within the body to repair damaged tissue at its source.
Whether drunk or poured directly onto a wound, the liquid worked within seconds. The moment it touched torn skin or seeped into the body, a gentle warmth spread rapidly, soothing the throbbing pain that pulsed beneath the surface.
Damaged tissue began to reconnect. Severed muscle fibers wove themselves back together like threads drawn into a tight stitch. Fine cracks in bone gradually sealed, as though time itself had reversed to a moment before the injury occurred. Open wounds dried, bleeding ceased, and the marks faded until only smooth, unbroken skin remained.
Within a single day, the bottle could produce approximately 360 milliliters of healing water per fill, and this process could be performed up to five times. Each time the liquid was depleted, the bottle did not become inert.
By channeling Cursed Energy into its cylindrical iron body, the internal curse mechanism would reactivate, converting that negative energy into stable Positive Energy in the form of clear liquid.
However, its limits were absolute. The bottle could only be refilled a maximum of five times per day. After the fifth refill was completed, the internal circuitry would cease responding, as though it had fallen into a deep slumber.
No matter how much Cursed Energy was poured into it, the bottle would remain unresponsive until the day truly changed at exactly midnight. When the hands of time crossed that boundary, its internal mechanisms would fully reset, restoring its functionality without degradation.
[Name of Cursed Tool: Positive Energy Bottle]
[Type: Active]
[Function: 1. This bottle is capable of converting Cursed Energy into Positive Energy in liquid form. By channeling negative energy into the iron container, the user can transform it into stable, pure, and safe healing water. The conversion process occurs through an internal curse program that filters and balances the energy before condensing it into liquid.]
[2. The Healing Water can restore all minor to moderate injuries, including burns, puncture wounds, slashes, blunt-force trauma, cracked bones, and twisted limbs. As long as the injured limb is returned to its original shape and position, the tissue will reconnect and heal rapidly within seconds. The effects are visibly clear: swelling subsides, skin color returns to normal, and pain nearly vanishes instantly.]
[3. The healing water can be refilled up to five times per day. Once the day changes precisely at midnight, the refill capacity will automatically reset to full, allowing the bottle to function once again without any loss of performance.]
[Rules: 1. The healing water cannot restore a limb that has been completely severed and lost, or one that has been utterly destroyed with no remaining structure to reconnect. This bottle is also incapable of saving a victim who suffers full-body burns that result in instantaneous death. If a severed limb is not a vital part and remains intact, as long as it is promptly placed back in its original position and then doused with the healing water, it can most likely be reattached. However, this bottle cannot grow a new limb from nothing. In cases of severe burns that are not immediately fatal, the healing water will significantly accelerate the body's natural regeneration process, allowing damaged tissue to recover far faster than it normally would.]
[2. Cursed Energy can only replenish the healing water up to five times within a single day. This limit is absolute and cannot be exceeded by any means. Once the limit is reached, replenishment can only be performed again after the day has truly changed at midnight.]
[3. This bottle merely converts Cursed Energy into Positive Energy in liquid form. The liquid works by accelerating and strengthening the body's natural healing mechanisms, not by creating new tissue out of nothing. It cannot heal injuries that cause instantaneous death. It may be used by pouring it directly onto the wounded area to focus its effect, or by having the victim drink it so that the healing energy circulates through the body's energy pathways and repairs the damage from within.]
That was one of the most useful Cursed Tools I managed to create during those seven days.
With the existence of the Positive Energy Bottle, I could train Shizuka and Rika at high intensity without constantly being shadowed by the fear that a single mistake would bring their progress to a halt.
Pain would remain part of the process, but it was no longer a threat that could end everything.
In truth, I did not create just one bottle. During those relentless seven days, amid the lingering traces of Cursed Energy that hung heavily in the air, I managed to complete three bottles at once.
Two of them I would keep for myself, stored neatly within my storage space to support training and to prepare for unexpected emergencies. The remaining bottle would be handed over to Mei Mei when she arrived later.
With Mei Mei's ability to manage transactions, read the market, and exploit the vast and slippery underground network she controlled like a shadow stretching through the city, I was certain that bottle would be sold at a price bordering on the absurd.
She knew exactly whom to approach, when to withhold, and how to make buyers compete against one another without even realizing they were being maneuvered.
After all, a Cursed Tool capable of healing wounds within seconds was not something one could simply stumble upon. The Positive Energy Bottle was far more than an ordinary healing concoction.
The moment the iron cap was twisted open and the softly glowing liquid touched the body, a slash would close as though pulled together by invisible threads, cracked bones would knit with a faint sound almost too subtle to hear, and the pain would recede like a wave drawn back into the sea.
The effect was swift, clean, and nearly without a trace, as if the wound had never existed in the first place.
Yet the Positive Energy Bottle was not the only result of those seven days that drained both my body and mind.
I also succeeded in completing another Cursed Tool, one far more complex and far more dangerous if it were to fall into the wrong hands: the Ten Gates Gauntlet.
True to its name, it was a pair of jet-black gloves marked with thin lines resembling cracks in glass stretching across the back of each hand. Those lines would glow dimly whenever Cursed Energy flowed through them.
Its function was to create a transparent door visible only to its user. There was no blinding flash of light, no thunderous boom, no dramatic distortion of the air like most teleportation techniques.
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