"Something's wrong. Why is Sasuke's chakra growing colder and colder?"
Because he had once possessed a Mangekyō Sharingan, Kakashi understood the Sharingan more deeply than even many members of the Uchiha Clan.
As the saying went, the eyes were the windows to the soul.
And as the manifestation of Yin Release chakra, which represented the power of the soul, the Uchiha Clan's Sharingan was even more a mirror of the heart. Thus, from Sasuke's icy gaze, Kakashi keenly sensed that something was wrong with him.
"Sasuke!"
After a brief hesitation, Kakashi called out to Sasuke.
Sasuke, who was in the middle of training Purple Electricity, asked impatiently, "What is it?"
Kakashi said with concern, "Relax. This is only a Chunin Exam, and this Chunin Exam is especially unusual. Even if you lose, it's no big deal. No one will blame you."
Sasuke snorted coldly. "What do you know!"
With that, Sasuke ignored Kakashi and lowered his head to resume training Purple Electricity.
Kakashi opened his mouth, but ultimately chose to remain silent.
Sasuke's current obsessive state was just like his own after he had witnessed his father's suicide, so he understood very well why Sasuke was unwilling to compromise with himself.
At that moment, Kakashi carefully observed Sasuke as he trained and became even more certain that the ocular power of Sasuke's Sharingan was rapidly increasing.
Could this be what the Second Hokage mentioned in the classified files? Once an Uchiha suffers intense stimulation, their brain secretes a special kind of chakra that enhances the Sharingan's ocular power?
After becoming an Advisory Elder and acting Hokage, gaining sufficient authority, Kakashi had reviewed every document in Konoha's Archive related to the Sharingan. Naturally, this included the Second Hokage's records of his human experiments on the Uchiha Clan.
The Second Hokage's research