After evolving Obito's Mangekyō Sharingan into the Eternal Mangekyo Sharingan, Shinji did not rest. He immediately used the Susanoo Lamp to evolve Shisui's and Hiruko's Mangekyō Sharingan into Eternal Mangekyo Sharingan as well.
This brought the number of Eternal Mangekyo Sharingan in Shinji's possession to three pairs.
Tap, tap, tap.
Shinji propped up his chin with one hand and lightly tapped the ground with the fingers of his other hand, quietly calculating.
The Eternal Mangekyo Sharingan was only one step away from evolving into the Rinnegan, so he was considering whether to spend some effort evolving all three pairs of Eternal Mangekyo Sharingan into Rinnegan—even Six Tomoe Rinnegan.
But he also understood that evolving the Mangekyō Sharingan into the Eternal Mangekyo Sharingan only required increasing the strength of the Yin Release Chakra. Evolving the Eternal Mangekyo Sharingan into the Rinnegan, however, involved the Power of All Things born from the union of yin and yang.
The difference between the two was like heaven and earth!
That was why Shinji was not entirely certain whether the Eternal Mangekyo Sharingan could be forcibly evolved into the Rinnegan through the Susanoo Lamp's fusion ability.
However, there was no way to reach a conclusion without trying.
Thus, Shinji steadied his mind and activated the Susanoo Lamp once more, attempting to use its fusion ability to forcibly evolve Obito's pair of Eternal Mangekyo Sharingan, which contained Kamui, into the Rinnegan.
To others, the Power of All Things was extremely rare—a precious force capable of qualitatively increasing the strength of their Chakra. But to Shinji, who had already advanced to Kekkei Mōra, the Power of All Things was readily available.
Therefore, while activating the Susanoo Lamp's fusion ability, he infused the Power of All Things he had created into Obito's pair of Eternal Mangekyo Sharingan.
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