[Scaling] Obito's Aura

“I expect that I know everything about the Uchihas.” The masked man’s
bouncing was replaced by a no-nonsense step as he moved toward Itachi. He
walked very much like a ninja now. “My objective is that old man’s life. If
you sit and watch quietly, I will spare yours.”
“I’m a ninja of Konoha—” He felt a pressure like he was being choked, but
he desperately forced his throat open enough to spit out the words.
Like a frog under the watchful eye of a snake, his body wouldn’t move the
way he wanted it to. Perhaps because of the man’s wordless pressure.

Perhaps his instincts, sensing the difference between his own abilities and
those of the man, refused to let him fight. Or perhaps all the blood in his body
had collected in his head, as his brain frantically tried to analyze the
inexplicable phenomenon that was the man’s body.
Whatever it was, the fact remained that he could not move.

I can’t come up with a clear solution to a situation I’ve been put in ...
This was the first time in his life anything like this had ever happened to
him.
The masked man came up beside him. On his approach to the daimyo, it
felt like he stopped next to Itachi. “Could you say what you said before one
more time?” The man cocked his head to one side.

“I am a ninja of Konoha,” Itachi said, hoarsely.
“Does that indicate the you wish to die?”
Die ... he thought vaguely.
“You can become a good ninja. There’s no need for you to rush to your
death here. Still, if you say you wish to die, then I won’t try to stop you.”
Move, Itachi ordered his body.

“Ngh!” As the half-groan escaped him, Itachi managed to move just his
right arm. He beat at the mask with his right hand, bereft of even a kunai.
Just like Tenma’s hand, his fist slipped through the face, and came flying
out the back of the man’s head. He was sure the man was standing there
before him, but no sensation of touch was communicated to his brain. The
fear that he had already fallen prey to the man’s genjutsu grew in Itachi’s
heart.

Itachi Shinden: Book of Bright Light Chapter 2 Part 3