Otsutsuki Kaguya's Karma? Otsutsuki Kaguya's Projection
Though trapped in another dimension, Black Zetsu still sensed a familiar presence descend. It instantly jolted him awake.
"It's Mother!"
"Mother is about to be revived!"
"Uchiha Jobu! And you, Otsutsuki Kaguya! You can both die!"
Black Zetsu sensed Otsutsuki Kaguya's presence despite the impassable barrier between them. It came from the same source as him, so he could feel it clearly.
If not for that barrier, Black Zetsu would already have rushed out and knelt at Otsutsuki Kaguya's feet to tell her of the bitterness and hardship he had endured for a thousand years.
But it had all been worth it. Now, Otsutsuki Kaguya was bound to return. The only question was whether it would happen sooner or later.
Uchiha Jobu felt that the Ten-Tails Chakra entering his body was not entirely pure. Otsutsuki Kaguya's will seemed to be hidden within it.
He recalled a special ability of the Otsutsuki Clan. When facing death, one of them could convert their body into data, back it up, and implant a copy in another living being.
A human was the best choice, especially a descendant with some Otsutsuki blood. Such a host would let the data restore itself to one hundred percent more quickly.
"Karma?"
The Otsutsuki Clan called this ability "Karma."
They copied themselves, converted their bodies into data, and implanted that data in another living being. The being who received it became the "vessel" for an Otsutsuki's revival.
Uchiha Jobu suddenly remembered more about Karma. First, an Otsutsuki had to choose a suitable vessel, preferably a descendant with Otsutsuki blood or someone whose body could withstand the implanted data.
If the vessel could not survive the process of restoring that data through Karma, the Otsutsuki could not fully revive.
"You hid your Karma