On a secluded mountain area in Shells Town,
"Kyle, is this how Observation Haki is trained?"
Gon touched the fresh, hot bump on his head, wincing in pain.
Kyle gently tapped his palm with the wooden stick in his hand, smiling. "That's right. Haki is divided into three types: Observation Haki (Kenbunshoku), Armament Haki (Busoshoku), and Conqueror's Haki (Haoshoku).
The first two can be mastered through training, but only those with the qualities of a king can awaken Conquerors."
Kyle's Nen Ability, the "Book of Resonance," was quite special. It could only create a resonance after signing a contract and taking the other party to another world.
In the Hunter World, he couldn't share Gon's training results.
Each world had its own unique rule system, and his ability happened to compensate for this.
As long as a contract was signed and they went to another world, the contractor would gain a body corresponding to the natives of that world, allowing them to train Haki and Nen Ability simultaneously.
This was why Kyle brought Gon to this mountain to train in Observation Haki.
Observation Haki and the En of the Hunter World had a similar effect, both greatly enhancing perception.
"Observation Haki is a sensory ability," Kyle explained. "It allows you to perceive danger even when you can't see, and thus avoid it in time."
"We only have three days. We must learn to dodge my basic attacks within this period."
Gon touched the bump on his head, and thinking of the upcoming battle with Hisoka, his eyes became firm again.
Kyle blindfolded Gon and began the "special training" again.
Each time the wooden stick fell, Gon's pain and insights were simultaneously transmitted to Kyle.
He trained Gon as if he were training himself, and all the physical pain was borne by Gon—this made Kyle swing the stick with an almost fanatical passion.
He completely disregarded the fact that Gon was being tormented.
Only extreme pressure could lead to a faster understanding of Observation Haki.
Gon's talent was astonishing.
In the first hour, he could only occasionally dodge based on his Hunter instincts, taking countless blows.
But through 'resonance,' Kyle could clearly feel that Gon's perception was slowly spreading out like a spiderweb, becoming increasingly sensitive to air currents and killing intent (attack intention).
Finally, after countless times the stick whipped by, Gon's head instinctively tilted, and the wooden stick brushed past his ear—he completely dodged it for the first time!
This was followed by the second time, the third time... He seemed to finally be able to sense the trajectory of the attacks and began to easily dodge Kyle's intentionally slowed normal attacks.
And Kyle, through resonance, also perceived Gon's progress, and immediately adjusted his attack speed, gradually increasing the difficulty of the training...
---
Inside a room in Heaven's Arena,
Killua practiced his Nen Ability, occasionally glancing at where Kyle was activating his ability.
"Didn't Kyle say he'd be back on the third day?"
Just as he was wondering, the space in the room suddenly began to fluctuate, and a light curtain slowly formed.
Kyle and Gon tumbled out of the light curtain.
Kyle's face was pale, clearly having expended a great deal of energy; Gon, though bearing some scars, had remarkably bright eyes.
"Gon!" Killua immediately rushed forward. "What was that other world like?"
Another world—a concept usually only found in novels—actually existed, pushing Killua's curiosity to its peak.
"It was amazing!" Gon excitedly said, "There's a power system called Devil Fruit and Haki there. Although it's different from our Nen, it's essentially very similar."
"Haki? Devil Fruit? Tell me more!"
Killua's eyes lit up, completely oblivious to Kyle, whose face was pale at the moment.
Kyle could only silently walk to the sofa and begin to recover his expended Nen.
Kyle closed his eyes to meditate, finding that although the consumption was still huge this time, his total Nen quantity had significantly increased compared to before.
It seemed that each time he opened the crossing channel, it was like undergoing extreme training, which could increase his total aura.
"Is this Observation Haki?"
Killua stood behind Gon, tentatively launching an attack, but Gon, as if he had eyes in the back of his head, easily dodged the assault.
"That's right, it can sense your attack intent. Even without using your eyes, you can perceive the attack trajectory through the airflow," Gon said proudly.
Killua's lips curved slightly, and his attack speed suddenly increased three to four times. Although Gon could sense the attack, his body couldn't react in time, and he was punched and sent flying into the wall.
"Killua!" Gon jumped up, covering his nose, and chased after him, and the two immediately started wrestling.
Kyle had wanted to recover quietly, but flying pillows occasionally hit him.
After enduring it three or four times, he could no longer hold back and directly joined the fight.
When the three were tired from fighting and collapsed on the ground, Killua turned his head and looked at Kyle with a serious expression: "Kyle, I want to sign a contract with you too."
Kyle looked at Killua, not surprised.
The desire to explore the unknown was human nature, especially for a youth like Killua.
"Really?" Surprise flashed in Kyle's eyes.
After Killua made his request, he actually felt a hint of apprehension.
He came from a family of assassins, and his nerves were very sensitive; he had once questioned Kyle.
However, the genuine surprise in Kyle's eyes dispelled his slight unease like sunlight.
This unreserved acceptance warmed Killua's heart, and he nodded solemnly: "Mm."
"That's great, you'll be the third member of my Pirate Crew," Kyle said with a smile.
"Pirate Crew? Kyle, you're going to be a pirate?" Killua was a bit surprised.
"That's right, pirates are very common in that other world, and there are many, many monsters among them. From what I understand, those monsters are all gathered in a place called the New World."
"New World?" Killua asked curiously.
"Yes, there are four of the strongest Pirate Crews there, known as the Four Emperors (Yonko)."
Hearing Kyle say this, Killua immediately understood what was going on and said with a serious expression, "Are the Four Emperors very strong?"
"Of course, they all possess the qualities of a king, and three of them are Devil Fruit users."
"If we convert our Nen into their Haki, their aura level would probably be over a million."
"Over a million?! That's a monster-level existence..." Killua's pupils contracted slightly.
As a Zoldyck prodigy, he understood the terrifying gap that number represented even better than Gon.
But the shock lasted only a moment, and his eyes immediately became sharp and solemn, as he quickly began to analyze the power disparity between them and the enemy.
Kyle's serious expression shifted again, and he said confidently, "But we will definitely surpass them."
Killua looked at Kyle's confident smile and did not refute it.
After all, Kyle's ability could share their training results. Once there were more people in the crew, all the training results from the other world, when stacked onto Kyle alone, would surely allow Kyle to become strong quickly.
Surpassing those monsters was only a matter of time.
Moreover, he was quite confident in his own talent; since he could train Haki, he was confident he would definitely not lose to the natives.
"I'm already starting to look forward to it."
"There are still 14 days until Gon and Hisoka's battle. Should we go for a trip? I also want to train Observation Haki."
Killua naturally didn't want to fall behind. Gon's method of sensing just now was completely different from his pure reliance on an assassin's intuition for dodging.
"My ability has a three-day cooldown. I'll have to wait three days before I can use it again," Kyle said helplessly.
"Kyle, have you ever thought about us buying a ship?" Killua said excitedly, stroking his chin.
Hearing Killua say this, Kyle shook his head and smiled wryly, "That's difficult to do. I can't take such a large ship with me."
Just as Kyle was feeling helpless, he suddenly thought of someone—Owl from the Shadow Beasts.
His ability, Mysterious Convenient Kerchief(Fun Fun Cloth), could shrink large objects.
As long as he found him, he could use his ability to bring the high-tech ship he bought to the Pirate World.
That would surely become a product of a new era!