He... Was Very Good

Black Tracker.

That was the name of Norris's Nen Ability.

Normally, when a Nen user released aura from their body and used it to conjure an object or a Nen Beast...

They could cancel the ability and draw the aura back into their body, avoiding needless consumption.

But as the aura returned, it would reveal its path to some degree.

So if Norris's Black Tracker was discovered by the person it was watching, it would dissipate instead. That way, the target had no aura trail to follow back to him.

This also meant that each use of his Nen Ability consumed a fixed amount of aura.

The number of times he could watch someone was limited.

If his target was a Zodiac as highly alert as Piyon or Kanzai, he had fewer chances to watch them, and each attempt would be effective for far less time.

But the ability's design at least ensured that Norris himself would not be found.

That was the source of his confidence.

So what if his target noticed?

He would just use the ability again, over and over.

He would keep watching, keep getting under their skin, right under their noses—and they still would not find him.

That was more or less how Norris approached surveillance.

Moyu's appearance shattered both his understanding and his confidence.

How had Moyu detected him?

Before he lost consciousness, Norris could scarcely believe it. The sudden turn of events was so far beyond anything he had expected that it left him stunned and bewildered.

Moyu looked at Norris, who had fallen flat on the ground.

Despite landing the first blow, he still had his Shadow Clone pin Norris's lower back with a knee and restrain both his hands.

Moyu had shown himself at a distance and spoken for a reason.