Uchiha Madara's Rinnegan Took Shape Amid Surging Battle Intent
At first, Uchiha Jobu had wanted to find Black Zetsu so he could study just how miraculous and extraordinary a life-form created through Yin–Yang Release could be.
He never could have imagined that his first encounter with Black Zetsu would be with one created by Uchiha Madara.
"You're saying this guy isn't an extension of my will? He's the son of some old woman named Princess Kaguya?"
Uchiha Madara's face was full of disbelief.
When this mass of black stuff had first appeared, it really had possessed a strange power. Uchiha Madara had nearly believed that it was an extension born from his own will. He had never expected it to be something an old woman had given birth to.
Izuna Uchiha closed his Tenseigan and rubbed his eyes helplessly. "Jobu, are you sure you haven't mistaken him for someone else? This guy is the Sage of Six Paths' younger brother?"
Uchiha Jobu nodded without hesitation. "Otsutsuki Kaguya gave birth to three sons. Her eldest was Otsutsuki Hagoromo, the Sage of Six Paths praised in ninja legends. Her second son was Otsutsuki Hamura, founder of the Otsutsuki Branch on the moon."
"As for the third son, he's the one you're looking at. His name is Black Zetsu, a monster created from pure Yin–Yang Release combined with a portion of Princess Kaguya's will."
"Incredible! Truly incredible! Yin–Yang Release can create life itself. The Sage of Six Paths possessed the power of the Otsutsuki Clan—no wonder people regarded him as a sage!"
"After all that, what are we supposed to do with this guy now? Kill him? How do you even kill something like this?"
Uchiha Madara pondered how he could kill Black Zetsu.
Black Zetsu said furiously, "Damn it! I never thought