Whenever the Impure World Reincarnation Jutsu came up, there was one man who had to be mentioned.
Tobirama: "Jutsu."
Hashirama: "Water?"
Tobirama: "No."
Hashirama: "Forbidden!"
Tobirama: "..."
The exchange above was excerpted from [Chronicles of the Hokage Generations].
That was right.
This man was the one who had invented that forbidden technique.
The Second Hokage, Tobirama Senju.
A man whose own experiences proved that what went around came around.
At that thought,
Obito couldn't help bursting into laughter.
"Hahahahahahahaha!"
Watching Obito suddenly howl with laughter, Orochimaru looked uncertain and alarmed.
"Hiss, hiss, hiss... Lord Obito, why... why are you laughing?"
Obito waved a hand as he laughed.
"Nothing, nothing. I just remembered something funny."
"Then let's do as you said. Come on, show me what you've got. My heart's pounding, love... ahem, let's begin."
Utterly baffled, Orochimaru walked out of the laboratory.
He was convinced there was something wrong with Obito Uchiha's head.
Soon,
Orochimaru returned to the laboratory with a death row prisoner in each hand.
"Lord Obito, I'll use these two to demonstrate the Impure World Reincarnation Jutsu for you."
Obito nodded slightly and gave a quiet "Mm."
Right in front of Obito, Orochimaru snapped one prisoner's neck.
"The Impure World Reincarnation Jutsu is a ninjutsu that summons the souls of the dead from the Pure Land of the Underworld into the impure soil of the Living World."
"It requires a certain amount of flesh from the deceased and a living person's body to serve as a vessel for their soul."
As Orochimaru explained this to Obito,
he took out a kunai and gouged a chunk of flesh from the freshly killed corpse.
Then,
he took out a scroll, spread it open, and smeared the large chunk of bloody flesh onto it.
"Once the deceased's flesh has been