Fish of the Northern Deep

The moment Fugaku opened his mouth, Uchiha Mai closed his eyes.

Come on, the guy across from him had Three Tomoe. Its boost to genjutsu far surpassed One Tomoe. Who would dare make eye contact with him? Better play it safe.

Showing off was one thing, but tactically, he still had to take his opponent seriously.

In Naruto, aside from a few especially fancy ones, genjutsu was nowhere near as varied as ninjutsu. Its practical combat effects also fell far short of ninjutsu and taijutsu.

Most ninja used genjutsu only as a supporting tool.

The reason genjutsu seemed so powerful was purely because the Sharingan carried it.

To put it bluntly, genjutsu used spiritual power to manipulate and disrupt an opponent's five senses and chakra. To achieve that, one generally needed to make contact with the opponent through their "five senses."

The Sharingan provided an extremely powerful boost to genjutsu and required no hand seals. A simple exchange of glances was enough to affect an enemy.

Some genjutsu masters, such as Itachi and Shisui in the original story, did not even need to make deliberate eye contact on the spot. A mere unconscious crossing of gazes could plant a "mark" within someone's mind.

Days or even half a month later, when you fought them, they could manipulate your five senses and chakra through that mark even if you deliberately avoided meeting their eyes.

Overall, this was a type of technique heavily dependent on control, understanding, and Kekkei Genkai. Without a relevant Kekkei Genkai, Yuhi Kurenai represented the limit of genjutsu in the original story.

Uchiha Tekka was a genius who had awakened Three Tomoe at the age of twelve or thirteen, but Uchiha Mai did not believe he was gifted enough to reach the level of Itachi or Shisui from