Naruto: Max Comprehension, Starting from Self-Created Ninjutsu

Ye Chen transmigrates to the Naruto world. Bad news: He's on the verge of death from severe injuries. Good news: He has obtained max comprehension. Even Tsunade, one of the Sannin, is helpless. At this moment, his heaven-defying comprehension kicks in! By absorbing the Mystical Palm Technique released by Tsunade, Uchiha Chen successfully creates an A-rank medical ninjutsu: Self-Healing Technique...

[You continuously observe the training methods of the Uchiha clan. You have an epiphany and create the Innate Breathing Method.]

[You continuously observe the activation patterns of the Uchiha clan's Sharingan. You have an epiphany and create the Rinnegan Training Method.]

Uchiha Madara: "As expected of my Uchiha clan. You have already surpassed me. I shall call you the strongest!"