Nostra Family Manor.
Inside the infirmary, with Kite's arrival, the space had been transformed into a top-tier patient room. The renovation cost considerable money, but for the Nostra Family, such expenses fell well within acceptable range. After all, the room served treatment purposes—one could never predict when family members might need it. Particularly Light's daughter. Nowadays, if something might benefit her, he spared no effort.
Pairo wasn't present; his physical condition had been thoroughly examined. The current task was creating suitable potions.
Kite surveyed the exquisitely packaged bottles and jars before her, nodding with satisfaction. "These are the materials I identified that should allow you—using your Nen ability—to create targeted repair potions."
Kevin examined the collection. Some items he didn't recognize—products that had undergone chemical extraction, fusion, and processing. Certain plant medicinal properties lacked online or book records; these were conclusions Kite had drawn from personal experience.
He was secretly learning. For his Nen ability, understanding each material's effect was essential to formulating appropriate potions.
"As we discussed," Kite began, "given your potions' potency, we need two distinct formulations for treatment. This approach is aggressive but will produce rapid results—make him completely new."
The method: first, a potion to thoroughly clear out Pairo's damaged residual tissue—the deformed, irregular growth resulting from years of unresolved issues. Sweep it all away at once.
Essentially, a specialized poison. It needed to be both potent and gentle simultaneously, with precision down to the neural level.
After clearing the deformed pathology, a second restorative potion would handle repair and regeneration.
[Healing Potion] might seem suitable, but Kite had tested it and deemed it insufficient. The potion worked, but its comprehensive, rapid healing mechanism was too crude for this highly precise surgical application. Healing Potion served sudden external and internal injuries—rapid healing to preserve life. What they needed now was targeted precision.
This approach could resolve Pairo's problem quickly. He would suffer during treatment—a necessary price.
Before acquiring materials, they'd communicated extensively, finally reaching this feasible conclusion. Kite stood at the pinnacle of the medical world; she approved this method. The entire treatment plan was primarily her design, tailored after fully understanding Kevin's Nen ability. Kevin served mainly as the instrument.
"Now, let's test my initial formula concept."
Following Kite's guidance, they began processing materials.
"Velvet Poison—extracted from velvet poison grass. Appears gentle but deadly; a dissolving poison." Kite explained while working. "The plant's surface has fine thorns. Upon piercing skin, it releases poison that immediately dissolves internal structures. Orally, however, it causes no problems."
Some materials required special channels to obtain.
"Use this machine to extract and concentrate the toxin. This quantity should yield approximately 200 grams."
The machine operated quickly, producing about 200 grams of stored venom.
Other materials underwent various treatments—some kept fresh, others dried and stored, some reduced to powder.
"This is a Honey Poison Sac—from a large insect species, the poisonous variety. Its specific substance composition depends on the insect's environment." Kite held up the specimen. "I've documented cases where the environment transformed into a nutrient pouch. If you want to create special potions in the future, pay attention to this insect type. They're relatively easy to raise—just require large areas of same-attribute plant environment. Building that takes effort, but it's doable."
Kite offered suggestions from her experience.
Kevin remained silent, nodding and taking diligent notes. Sister, keep talking, he thought. Intense learning in progress.
These past days communicating with Kite had advanced his potion-making understanding by leaps and bounds. He itched to create more useful new potions but suppressed the excitement—he needed to continue learning.
Soon, the processed materials stood neatly arranged before them by category.
Kite produced a small container holding a piece of skin and flesh—a sample taken from Pairo's body. This biological material would serve as a [Fusion Agent].
Kevin had never considered using such material as a Fusion Agent, but Kite's bold idea intrigued him. She believed that if Kevin offered custom services in the future, this type of Fusion Agent would prove indispensable. Everyone's physical condition differed; using flesh and blood as a Fusion Agent—or even as part of auxiliary materials—might make potions more compatible with the user's body. Customization targeted specific needs, and without accounting for individual physiological differences, various problems could arise. This depth of medical knowledge required continuous study to fully grasp.
Kevin took a deep breath and materialized the Potion Crafting Table.
He placed the appropriate materials on the table and checked the result description.
[Organism Dissolution: Capable of dissolving necrotic parts hidden within the body of a specific target, but will also cause dissolution damage to some non-necrotic targets.]
"No." Kite shook her head firmly.
This wouldn't work. Internal dissolution that accidentally damaged important parts could paralyze Pairo directly. Worse, he might die on the spot. The risk was too high—not something Kevin would impose on Pairo.
They readjusted the materials.
The target specification was correct; the description already indicated the potion could internally dissolve necrotic parts. They just needed to eliminate the random damage. The materials themselves were suitable—the issue lay in dosage and fusion method.
After multiple adjustments, they achieved the perfect formula.
[Gold Scale: Velvet Poison (Extraction - 15g)]
[Silver Scale: Honey Insect Poison Sac (Powdered - 115g)]
[Copper Scale: Biological Sample (Whole Piece - 3g)]
[Finished Product: For specific biological individuals, dissolves deformed and necrotic parts within their bodies. Requires target guidance.]
Exactly what they wanted.
Kevin began the fusion process; within minutes, the potion was complete.
"Now for repair and growth," Kite said with relief. "This part is relatively easier."
True. The dissolution phase carried higher risk, requiring repeated adjustments. Repair and treatment were simpler—even excessive effect wouldn't matter, as long as the necessary parts were successfully repaired. Moreover, Kevin already possessed several healing potions for different scenarios. He had ample experience; when one thought of potions, healing effects naturally came to mind first. He'd initially learned and developed in this direction.
Drawing on Kite's medical understanding, they worked efficiently. Consuming some relatively precious materials, they created a potion that exceeded their expectations.
[Result: Consumes stamina and nutrients. Repairs life forms.]
"Repair?" Kite frowned doubtfully. "Isn't this description too general?"
The statement was vague. What did "repairs life forms" mean? Which aspects could be repaired? How should "repair" be defined? As a top medical expert and legal scholar, Kite couldn't accept such ambiguous definitions. She needed precise, clear explanation.
If they couldn't clarify, this conceived potion would be abandoned—and they'd spend significant time rethinking and reconstructing.
Kevin offered a reminder. "You can't view Nen ability products entirely through a medical lens—especially mine. Its tendency toward real-world scientific basis makes you forget its essence."
Kite paused, then nodded. "You're right. I was thinking too scientifically, too meticulously."
She wasn't just a top medical expert—she was also a top Nen user. Nen abilities, for the most part, carried inexplicable fantastical elements. They were products jointly determined by a person's experience, will, and body. They often conformed to practical scientific principles but could transcend common sense in certain aspects.
Specialization and Conjuration types exemplified this. Specialization abilities often produced phenomena completely inexplicable by modern science—attempting to explain them was wishful thinking. Conjuration abilities had distinct characteristics; conjured items often exhibited extreme enhancements in certain aspects and could even bring about specific "rules." Like conjuring an ordinary rope that, under certain conditions, could definitely restrain a target.
Even if the opponent's strength far surpassed one's own, they couldn't break free.
"Then what do you think 'repair' means in your potion's context?" Kite pressed.
Kevin had been considering this from the start. "Two possibilities. First—the most dramatic—complete bodily restoration, potentially including limb regeneration. But that seems unrealistic. To some extent, it qualifies as repair, but limb regeneration更像 recovering something lost rather than repairing existing damage."
Kite nodded thoughtfully. "So repair requires existing damage and repairable components. Understood."
Kevin continued. "Second possibility: scenarios where a body part is severed or damaged. For example, if an arm is cut off, reattaching it involves repairable components. Drinking the potion could reattach the arm perfectly. That's a more scientifically grounded effect, closer to repair's original meaning."
"From modern science's perspective, perfect arm reattachment is impossible—various problems and sequelae always arise. But with Nen abilities, many different powers can achieve perfect repair." Kite's experience in this area informed her question. "Do you think your potion can achieve that effect?"
Kevin smiled. "Whether it works is actually easy to determine. The materials we used are undoubtedly C-grade." He felt a certain craving from all three materials. The fusion agent for the repair potion was Golden Base Petals—the ordinary type he'd previously named, distinguished from higher-quality Gold Vein Petals.
"Now it depends on production time and Nen consumption." His current Nen reached 21,000. He could create even the most top-tier C-grade potions—unless it was B-grade, specifically mid-to-high-end B-grade. If production required that much Nen and time, then the potion could achieve limb regeneration.
Without hesitation, he began crafting.
Nen surged into the alchemy table. Kevin sat motionless, eyes closed, as Nen drained continuously.
Forty minutes passed—the longest he'd spent on a single potion in ages. This indicated the potion had reached C-grade peak level.
"How is it?" Kite asked, having waited patiently.
Kevin extracted the finished product. "The second possibility we discussed."
Kite nodded, unsurprised. "Then demand for this potion will be enormous." She knew Kevin planned to open a shop. Every customer would want to carry one—a potion capable of reattaching severed limbs. While some Nen users possessed limb repair abilities, they might not arrive in time or be reachable when needed. This represented a common, highly probable emergency scenario.
Carrying such a potion would solve the problem completely. Kite felt no particular attachment to it—she possessed similar repair capabilities herself.
Kevin examined the potion with satisfaction. Finally, a decent high-grade product to offer. An unexpected pleasant surprise.
With both potions successfully created, it was time for Pairo's treatment.
Everyone gathered upon hearing the news.
Kite's face hardened at the crowd. "Everyone out. During treatment, family waits outside."
They withdrew quietly, leaving only Pairo in the patient room.
Pairo's young face showed nervousness.
Kite's expression softened. She offered a gentle smile. "It's not as scary as you imagine. With your uncle's potion, the treatment process will be very safe. The effects should exceed our expectations—no need to worry." She patted his shoulder and guided him to the hospital bed.
She chatted casually, soothing his emotions. Being both lawyer and doctor made her exceptionally skilled at comforting others.
Pairo took a deep breath, working to ease his tension. Thanks to his training controlling the Scarlet Eyes, his emotional regulation improved steadily.
Pairo removed his clothing, left in only a pair of special shorts. Lying on the hospital bed, medical equipment began detailed scans of his body. Kite operated the instruments, and Kevin could perceive her infusing Nen into the machines.
After anesthetic injection, within two seconds, Pairo's eyes closed.
Under Kite's precise guidance, one needle inserted into Pairo's lower limbs, another into his eye socket—the lesion sites previously identified by scanning. Subtle Nen flowed slowly inward.
Soon, targets remained positioned at the diseased locations. This was key—guiding the medicine to designated spots for dissolution.
"Administer the medicine."
Kevin acted immediately, injecting the potion directly into Pairo's esophagus through a special syringe. Absorption was instantaneous.
"Strange," Kite murmured. "You can't observe the working process within the body." She'd hoped to witness the medicine's action. Nen abilities used existing materials, not pure Nen—logically, there should be liquid volatilization. But there was none. The potion seemed to possess a unique property, taking effect immediately upon entry, bypassing any action phase.
Fifteen minutes passed as the medicinal effect fully exerted itself. Guided by the target points, necrotic parts dissolved instantly.
"If he weren't anesthetized," Kite muttered to herself, "he'd be screaming in agony." These parts weren't merely necrotic—they'd grown crooked, irregular. Dissolving them was bone-chillingly painful. The sensation of something piercing through flesh and bone, beyond control.
After a moment, she continued. "Alright. The repair potion can be used now."
Another potion entered Pairo's system via syringe. The repair effect manifested immediately.
Pairo's body bore two wounds: one a cutting wound, the other from the previous flesh removal. Under their gaze, the cutting wound gradually repaired—not through clotting and healing, but through wound edges drawing together and disappearing.
The flesh removal wound showed no change.
"Second possibility, just as you said." Kite concluded.
The phenomenon confirmed it.
Treatment concluded.
Though Pairo remained unconscious, detailed rescanning revealed complete recovery. He was now a healthy child. Eye and leg problems resolved—though newly repaired areas required time to heal fully.
As anesthetic gradually faded, Pairo stirred groggily, sitting up.
"I—I, huh?" He froze mid-sentence, extending a hand to wave before his eyes.
"My eyes." Previously, age had brought increasing blurriness—difficulty seeing, symptoms unlike ordinary nearsightedness. But now, everything before him was incredibly clear, as if the entire world had brightened, sharpened. Like a monitor upgraded.
"I'm better? I'm really better?!" Excitement filled his voice. Only he knew the painful, difficult process of slowly becoming disabled.
Kevin stepped forward quickly, helping him up.
Pairo's feet touched ground. He tried walking, then quickly circled the room, even jumping twice. No more sickly dragging.
"Different. Completely different. Like returning to childhood." Pairo's emotions intensified. It had been so long since he'd experienced such free jumping and running. Age had worsened his leg problems, but now—aside from slight residual anesthetic weakness—his body felt like before that cliff fall.
"Thank you, thank you, Uncle." Pairo hugged Kevin tightly, tears streaming.
Kevin smiled, gently patting his head. "Alright, hurry outside. Kurapika's waiting anxiously."