"This young body does have greater potential, but being resurrected from the dead doesn't come without a price."
Netero shook his head.
"Nen Abilities have restrictions and vows that can act as multipliers, but at their core, Nen Abilities must follow the principle of equivalent exchange."
"Whether it's an ordinary Nen Ability or a Vow and Limitation, it must follow that same principle."
"A Vow and Limitation merely doubles the price you pay."
Clearly, as the world's strongest man in the Hunter world, Netero understood Nen Abilities more deeply than Nara Dan did.
Using an ordinary Nen Ability already came at a cost: the expenditure of aura, as well as certain commonplace restrictions.
For example, Feitan had to be injured, while Chrollo had to hold the Bandit's Secret in his hand.
A Vow and Limitation merely doubled that cost. Examples included Kurapika later sacrificing his lifespan and making a vow that wagered his life, as well as Gon exhausting his potential ahead of time and losing the ability to use Nen ever again.
That was how they could unleash power a hundred or even a thousand times greater than before.
Nara Dan raised an eyebrow and looked at Netero again, suddenly realizing something.
"Could it be, Chairman Netero, that you..."
Ging seemed to have guessed the price Netero had paid for his Rejuvenation, too. He looked at Netero, deep in thought.
Netero nodded.
"That's right. Even now, I can't use Nen."
"I can't even sense its presence."
Nara Dan understood. He'd just reached the same conclusion himself.
As the world's strongest Nen User, Netero wouldn't have lost his control over Nen just because he'd taken on the form of a boy.
In fact, reopening his Shoko and Awakening his aura would have been easy for him with a single thought.