Because he had sensed that all-too-familiar fluctuation of Dust Release from the halo in Uchiha Yan's palm.
He knew it perfectly well.
It was real.
That brat had really figured out Dust Release.
It was utterly ridiculous.
Yet the facts were right before his eyes.
"How does he know Dust Release too? Did he copy it while we were fighting just now?"
"Impossible! Absolutely impossible!"
"Right! That brat knows Flying Thunder God. He must have snuck into Iwagakure while I wasn't paying attention and stolen my Dust Release scroll!"
"Yes! That must be it!"
Unfortunately, that was nothing more than self-deception.
He knew better than anyone that the scroll had always been kept close to him and had never left his sight.
There was simply no possibility of it being stolen.
So, even if he refused to admit it, perhaps the first guess was the truth.
But he absolutely refused to accept it.
How could there be someone in this world with such monstrous talent?
No human could possibly do something like that.
It was not just Ōnoki. Everyone on Konoha's side was dumbfounded as well.
"What's going on? Lord Yan is using Dust Release, right? It has to be Dust Release, right? How does he know it too? Isn't that the Tsuchikage's exclusive secret technique?"
"Could Lord Yan have secretly learned it from the Tsuchikage?"
"Do you believe that?"
"It does sound unlikely... If he had secretly learned it, the Tsuchikage would have exploded long ago. There wasn't even a hint of news before this."
"Could he have learned it just by watching during the fight?"
"That's even more ridiculous. If someone could learn such a terrifying Kekkei Tōta secret technique with one look in battle, what secrets would be left in the Ninja World?"
"Others might not be