After deciding to invest heavily in Yachihoko, Shinji took out Fugaku Uchiha's pair of Mangekyō Sharingan.
The pair of Mangekyō Sharingan contained two powerful Mangekyo Dojutsu: Amaterasu and Izanagi.
Izanagi in particular was a Dojutsu that involved fate. To a certain extent, it was far more valuable than ordinary Mangekyo Dojutsu.
Staring at the pair of Mangekyō in the small nutrient tank, Shinji tapped his fingers on the table.
Fusing two pairs of Mangekyō Sharingan into a pair of Eternal Mangekyo Sharingan wasn't as simple as just gathering them together.
It also depended on whether the two users were related by blood—in other words, whether the Chakra natures of the two pairs of Mangekyō were similar.
Without a blood relation, the chance of a successful fusion would be greatly reduced.
But Shinji had already found a way around this restriction: he could replicate Karin's path to fusing Eternal Mangekyo Sharingan!
The method was simple.
Wear down the Mangekyō Sharingan to be fused until they were completely blind, even draining their Chakra and leaving them half-damaged.
Then use the fusion recipient's Chakra to nourish and revive the half-damaged Mangekyō Sharingan, bringing them back from the dead!
That way, the revived Mangekyō Sharingan would have a kind of blood relation with the fusion recipient—or, in other words, their Chakra natures would be very similar. This would meet the requirements for merging them into a pair of Eternal Mangekyo Sharingan.
Although the method was crude, it had been tested in practice and was proven to work. So as long as Shinji was willing to use Fugaku Uchiha's pair of Mangekyō Sharingan, a little preparation would let him give Nameless a pair of Eternal Mangekyo Sharingan.
A few days later.
In the secret laboratory, Shinji opened the nutrient pod where Nameless had been sleeping.