Rinnegan.
Tobirama entered the Alliance laboratory and inspected the Shinobi World's current top-secret research project.
Ever since Madara had awakened this supreme ocular jutsu, the Alliance had launched related research as well.
The two beings who had actively fused their chakra
had already conclusively verified the necessary conditions for the experiment.
The observation log on Hashirama and Madara came to an end when they left Konoha.
For ordinary people, obtaining Ashura and Indra cells was exceedingly difficult. Yet for Tobirama, it was a simple matter. So long as he tactfully discussed the greater good with Elder Brother, Madara would naturally contribute tissue samples.
The container holding Madara's flesh and blood reflected Tobirama's blurred face. His usually stern expression relaxed in a rare moment.
The true boundary between life and death had been experienced when the Sage of Six Paths crossed the river of time and reappeared in the world.
With that thought, Tobirama's gaze flickered. Through the transparent glass, his fingertips sought to grasp the key to all creation.
"Thump."
Clear, rippling fluorescence shone from his fingertips into those crimson eyes. Tobirama lightly flicked the invisible barrier, then reluctantly withdrew his arm.
So much experimental material lay within reach. How could he not be tempted by this power of reincarnation, which could peer into the very origin of chakra?
Just like those shinobi who had colluded with the northwestern nations for their own interests and those of their clans.
The ripples spreading across the water resembled the multiple concentric rings within the Rinnegan, tugging at Tobirama's thoughts.
"Hah—"
It was too difficult.
As a researcher, Tobirama understood perfectly how difficult it was to assemble the power of the Sage of Six Paths.
The previously perfected White Zetsu had been taken away by the Sage of Six Paths. Tobirama had no