"The resurrection method I mentioned earlier has no such side effects. It is true resurrection."
That method was naturally the Rinnegan's ability, Rinne Rebirth. It required the caster to sacrifice themselves in exchange for another person's life.
But this method was even more demanding than the previous one. There was only one pair of Rinnegan left in the world, and it was in Nagato's possession in Amegakure. Could Nagato possibly be persuaded to willingly trade his own life for the Second Hokage's?
Tobirama fixed his gaze on Makoto, waiting for him to reveal the next resurrection method.
However, Makoto had no intention of telling him yet. He merely said, "I need to go back and look through some materials."
If he told Tobirama about this method now, would Tobirama do something to Nagato?
Makoto could not be certain. The Second Hokage was no kindhearted man.
Amegakure was still of great use to Konoha.
Tobirama frowned inwardly, but there was nothing he could do. After all, Makoto had always held the initiative.
Still, learning about soul splitting meant his trip had not been wasted.
He did not immediately return to the laboratory. Instead, he went to the place in the village where scrolls were stored, searching for the Uzumaki Clan records Makoto had mentioned.
After spending a full day and night there, he found roughly the same things Makoto had described.
The Shinigami truly existed. The Uzumaki Clan's Reaper Death Seal was an advanced Sealing Jutsu that summoned the Shinigami to aid in battle.
The Shinigami was the deity who governed the cycle of life and death, sending the souls of the dead to the Pure Land.
He suddenly understood what was going on with the pair of twins in the laboratory, and why Orochimaru had tried to fuse their souls