After leaving Karin's apartment, Shinji began preparing for the eye transplant surgery ahead.
First, he slipped into the Forest of Death and readjusted the Mangekyō Sharingan he was using in a hidden cave, replacing it with the right eye of his grandmother, Chiri Uchiha, which held the Naobi Dojutsu.
After placing his grandmother's Mangekyō in a nutrient tank, he began to consider his options.
He was currently using Fugaku Uchiha's pair of Mangekyō, which gave him the Mangekyo Dojutsu Amaterasu and Izanagi.
In other words, until Karin had fully restored his grandmother's Mangekyō Sharingan, he wouldn't be able to use Naobi to contact anyone.
Still, this period shouldn't last long.
With her powerful Sage Body now that she'd entered a stable phase, it would take Karin no more than a week to restore sight to a Mangekyō Sharingan.
"Once Karin restores my grandmother's Mangekyō, I can use the Susanoo Lamp to fuse their Dojutsu directly."
He felt a surge of excitement.
But he knew that the closer he got to this moment, the calmer he needed to be.
Then he considered the fusion process.
Without the Susanoo Lamp Dojutsu, even if he had a pair of Mangekyō Sharingan belonging to a blood relative, he would still have to fuse them through a transplant operation.
But a transplant usually required a long period of adjustment.
In the original timeline, Sasuke had spent a long time recovering at the secret base Obito had prepared for him after receiving Itachi's Mangekyō.
Shinji couldn't be sure of the exact duration. He could only guess that it took somewhere between several weeks and a month.
And it was impossible to use one's eyes during the fusion period. Since Shinji lived in Konoha, he couldn't possibly fuse an Eternal Mangekyo Sharingan through a transplant operation.
Even