"Father said it's different above the 200th floor of Heavens Arena... does that mean it involves Nen?"
"Is everyone above the 200th floor a Nen user?"
Killua frowned slightly, his mind drifting back to the woman from the airship.
If that's the case, then I really was way behind back then...
"But why didn't Father just tell me directly?"
"And why didn't he teach me Nen?"
Kaizen uses Nen. Father definitely does too. Big brother Illumi, even second brother Milluki...
Killua thought back to the last time he visited Zoldyck Manor, recalling how he'd tried to threaten Milluki. His face flushed a bit at the memory.
If second brother already knows Nen, then there's no way I could beat him, right?
And I actually dared to threaten him...
He scratched his head, embarrassed.
I bet he laughed at me behind my back.
But strangely, Killua remembered that Milluki hadn't laughed to his face. That thought unsettled him more.
Kaizen also said we have to wait for the teacher the Hunter Association arranged. What's the deal with that?
Killua's frown deepened.
...
"Kaizen's partner looks strong," Gon remarked, eyes glued to the screen.
On it, Nina nimbly dodged another attack. She slipped past the woman's guard, stepped to the side, and delivered a clean punch to the waist.
The referee raised his hand.
"Effective hit! Full ten points. Match over!"
"Winner: Nina!"
The woman lowered her fists, reluctantly conceding.
"I lost... I concede."
As soon as the referee called it, Nina exited the arena, quickly disappearing down the hallway.
"Let's go too," Kaizen said, rising from his seat.
Tessia and Ponzu followed behind him.
...
"Kaizen!"
At the end of the passage, Nina came running up.
"Nina."
She turned her gaze to Ponzu. "Is this Ponzu?"
"Nice to meet you, Nina," Ponzu said with a smile.
Kaizen cut in, "Let's head back first."
The group of four returned to Kaizen's floor. The training grounds, which had been mostly empty, were soon filled with activity.
Polar Bear trailed after Nina like a shadow.
...
"Kaizen, how long are you staying this time?" Nina asked, her voice hopeful.
"About ten days," Kaizen replied. "And during those ten days, I plan to run us through some specialized training."
"Our team has been together for a while, but we've never done a proper team battle. Up until now, it's been mostly solo fighting. We're lacking in coordination."
"But now, we're almost fully formed."
Ponzu handles intel gathering.
Nina specializes in infiltration.
Tessia handles close combat.
Siper and Sally are snipers—long-range suppression.
Siper might not improve drastically in a short time, but she still has her role. Sally assists her as a deputy.
Against most average enemies, this team setup is enough to win decisively.
If they run into tougher opponents, Kaizen—hidden in the shadows—is the trump card.
His original idea behind forming this team wasn't for direct combat. It was to build a support system—people who could gather intel, draw out enemies, and act as both scouts and bait.
Because in the world of Nen, information is everything.
A well-informed Kaizen could plan and strike more effectively. Especially when the enemy is also organized as a team.
No matter how strong Kaizen becomes individually, numbers still matter.
Hearing all this, Tessia's eyes sparkled.
"When Shizuku and the others return, let's all go over our abilities together," she said. "A team needs absolute trust. Once we lay everything out, we'll assign roles properly based on our Nen abilities."
Kaizen turned to Nina. "By the way, how's Kastro coming along?"
"He's mastered all four basics—Ten, Zetsu, Ren, and Hatsu—and developed his ability," Nina said, glancing at Tessia. "Actually, his ability is kind of modeled after Tessia's."
"Modeled after Tessia?" Kaizen raised an eyebrow.
If he's copying Tessia, then Kastro is already off-track compared to his original path—where his ability had disappointed even Hisoka.
Not that it surprised Kaizen.
That's exactly why he got involved with Kastro in the first place.
One: he didn't want to waste Kastro's potential.
Two: Kaizen suspected Kastro might be worth keeping in reserve as a team member.
"What did his ability become?"
"A tiger," Nina said. "Well, not exactly. It's a hybrid form—a humanoid tiger. He walks upright but has claws and fangs like a beast. His size increases too."
"Defense is impressive."
She took out her phone. "I took a picture."
Kaizen took the phone and glanced at the screen.
A strange feeling of familiarity washed over him.
The form looked almost identical to a character from a video game he'd played in his past life.
Perfect World. That monster-class transformation… it's not just similar—it's exactly the same.
Still, compared to the lame clone ability that once made Hisoka roll his eyes, this version of Kastro was far better suited for combat.
And definitely stronger than in the original timeline.
"He named the ability White Tiger Transformation'" Nina added. "Right now, he's at D-rank, but his growth is incredibly fast."
Kaizen nodded.
Talent-wise, Kastro was definitely above average—even more so than Sally, if the future played out like the postscript hinted.
After all, anyone who caught Hisoka's attention—especially before they'd fully matured—was bound to have promise.
As Nina spoke, Kaizen found his interest growing.
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Fanfic is completed on patreon.com/FanficsHub (1047 chapters in total)