The Naruto World had an underworld.
After a ninja died, their soul would return to the underworld, and Tobirama Senju's Forbidden Art: Impure World Reincarnation could pull those souls back out of the underworld.
The souls could return, but every soul summoned through Impure World Reincarnation lacked any memories of the underworld.
Death!
For Madara Uchiha, it was merely as if he had just taken a nap. When he opened his eyes, not only had the plan he formulated failed to follow the trajectory he set,
but instead, it gave him the impression that the world was changing too fast, leaving his old-man thinking unable to keep up and making him feel somewhat obsolete.
"The Uchiha Clan managed to produce seventeen pairs of Mangekyo in the exact same generation; that number truly shatters the clan's record," Madara Uchiha marveled.
Originally, when he saw Inabi's and Tekka's Mangekyo, although he was somewhat shocked, it was still within his acceptable range. However, seventeen pairs of Mangekyo Sharingan genuinely made him feel as though his worldview had been upended.
As the orthodox clan head of the Uchiha Clan, he naturally understood very well the attribute that the more people from the Uchiha Clan died, the stronger their battle prowess became, but it should never have reached such an absurd degree.
The death of several thousand Uchiha clansmen would at most catalyze three pairs of Mangekyo, and it was absolutely impossible for seventeen pairs to appear.
"According to Itachi's analysis, the reason the Uchiha were able to produce so many Mangekyo is most likely because shortly before the Night of the Uchiha Clan Downfall, Setsuna Uchiha suddenly produced thousands of secret pills left behind by the ancestors and had the entire clan ingest them."
"Those secret pills most likely possessed the ability to increase