As mentioned before, the Sharingan was an exceptionally special bloodline limit. As eyes that reflected the soul, the ultimate Mangekyo ocular techniques were determined jointly by one's bloodline genes and one's mind! The same bloodline could awaken entirely different Mangekyo in different people.
The circumstances under which Obito and Kakashi awakened their Mangekyo were highly unusual. They awakened them simultaneously after witnessing Rin's death. Not only did they share remarkably similar states of mind, but their close proximity also created a wondrous spiritual resonance, resulting in two different yet perfectly complementary ocular techniques—Kamui!
The doubled despair and spiritual energy layered atop one another, creating the most unique ocular technique in the Uchiha Clan's history! Their closed hearts had produced a rare alternate dimension, while their two Mangekyo were perfectly matched, capable of both offense and defense! Once combined into complete Kamui, it could be considered one of the strongest Mangekyo ocular techniques!
Throughout the history of the Shinobi World, aside from Nawaki's "Pure Land Purgatory," no ocular technique had ever consisted of two perfectly complementary techniques of the same origin. He knew full well that if he could obtain this technique in its entirety, it would be far more than one plus one equaling two—it could achieve absolute perfection in a certain field!
If "Pure Land Purgatory" was the perfect genjutsu, then "Kamui" was the perfect space-time ninjutsu!
Thus, even after obtaining the Rinnegan, Nawaki could not help developing a keen interest in Kamui.
To acquire Kamui's ocular-technique template, he needed not only Obito's genes, but also the Wish Power System to scan the Mangekyo's structure.
Naturally, such a scan could not be completed during that brief clash. In truth, Nawaki had long since concealed himself underground with the Mayfly Technique, personally witnessing the entire battle that night while having