All the plans went to waste.
Initially, everything was going perfectly, exactly according to his plan. It was only necessary to wait for Uchiha Madara's Rinnegan to awaken, and it was time to act — to trick him into reviving his mother.
However, a group of so-called aliens from a parallel world completely destroyed his plans. You could even say she literally trampled his plans into the mud.
— Where did parallel worlds come from in this world? And it would be fine if they just existed, but can someone explain to me what "Uchiha Yue destroyed the world" means?
— What do you mean, "Mangekyo Sharingan is a force that surpasses all things, and contains the power that can destroy the world"?
"And what kind of nonsense is it that 'Rinnegan is just a kind of Mangekyo Sharingan that can't hold a candle to him'?"
Somewhere in the Shinobi world, Black Zetsu was rereading the information he had gathered with disbelief. He saw only one phrase between the lines: the world is destroyed. Someone named Uchiha Yue, a walking disaster, relying only on the power of his Mangekyo Sharingan, brought the entire Shinobi world to the brink of destruction. Is the world about to perish?
No, the world has already died!
And what about Black Zetsu? Who is this guy? Ootsutsuki Kaguya? Who's heard of her? Endless Tsukuyomi? What kind of technique is this?
This is exactly what drove Black Zetsu to despair. No one knew about his existence, about his plans, about his mother. What did that mean?
This meant that his plan had failed. He couldn't revive his mother. At that moment, something went wrong with Rinnegan, and he missed his chance.
Of course, there was another possibility: he revived Mother, but she was quietly and imperceptibly defeated at the hands of Uchiha Yue and finally died.
However, this thought, as soon as it appeared in his head, was immediately discarded by him. Impossible! It was only necessary for Mother to be reborn, and all the problems would be solved. Some Uchiha Yue... how could he, even if he was powerful, be an opponent for his mother?
After all, the so—called Sharingan is just an echo of her power.
— How can a Mangekyo Sharingan compare to a Rinnegan? Something's not right here. Why did everything happen like this?
— Calm down. I need to calm down!
Black Zetsu lowered his head. From some scraps of information, he realized that the aliens from the parallel world knew about Rinnegan. Moreover, the owner of the Rinnegan was trampled by someone named Jigen.
He clenched his fists, forcing himself to calm down.
After analyzing everything again, he came to the conclusion that Rinnegan had indeed been successfully created, but due to the existence of Uchiha Yue, the plan to copy him from a parallel world had failed. He was unable to gather the Tailed Beasts and revive his mother. This Uchiha Yue was indeed incredibly strong, to the point of absurdity. Like an impregnable wall, he sealed off the path to Mother's rebirth.
At the thought of this, Black Zetsu breathed a sigh of relief. The failure did not happen to him, and if the failure was caused only by this reason, then it could still be accepted. Fortunately, this is not…
Black Zetsu didn't even think about the latter possibility. It was just out of the question!
Uchiha Yue was able to destroy the world only because his mother was not reborn. The destruction of the world — just think! He knew that his mother was capable of it too.
Moreover, the failure of his copy in the parallel world gave him an advantage here.: his own plan was not revealed. Even if he appears in the Shinobi world, no one will know that he is Kaguya's will. That was good.
"Phew, I was so scared. Don't worry, Mother, I will definitely revive you. And some Uchiha Yue doesn't deserve any attention at all!
"Now I need to rethink my plan!"
— By the way, what about my second version? Did he really die there?
"If Mother had revived me, then some Uchiha Yue would have been the kind of person who could be killed with a single kick. Perhaps my mother will even be interested in this man.…
After thinking about this, Black Zetsu relaxed and continued thinking with ease.
— No, you're wrong, my other self!
But at that moment, a familiar and yet alien voice rang out from behind him. Black Zetsu froze, and then abruptly turned around. Behind him, it is unknown when, another Black Zetsu appeared.
"Are you... my version of a parallel world?" What am I wrong about? What do you mean?
"So you came to this world too." Did you bring a Rinnegan with you? Maybe we can revive two mothers at once!
Seeing the dark silhouette, Black Zetsu relaxed a little, instantly realizing who was in front of him.
"Mother... couldn't resist Uchiha Yue. No, she couldn't... my mother... had already died by his hand. My other self, you're wrong!
— Uchiha Yue is not a human being. He's a monster. This Mangekye Sharingan has a power that surpasses all things!
— It's impossible to defeat him!
The black Zetsu from the parallel world looked broken. With a trembling voice, he approached his local version, and there was immense despair in his eyes.
He still remembered the scene when his mother, clutching him in her hand, told him to run. He remembered how she disappeared forever into that impenetrable darkness.
Without the slightest chance of resistance. Like a stray dog, she was killed instantly.
The scene he imagined—how the reborn mother destroys Uchiha Yue—never happened!
- what? What are you saying? Has Mother lost? Did you lose to some Uchiha Yue who doesn't even have a Rinnegan and only has a tiny drop of Divine Tree blood in his veins? What a joke!
— This just can't be happening! How could the invincible mother lose? I don't believe it! You're kidding, right?
— You can't joke with such things, my other self!
His doppelganger's words made the local Black Zetsu raise his voice. He clung tightly to his doppelganger and began to shake him. Even though it was another world, he still couldn't imagine his invincible mother losing to some Uchiha Yue. A moment ago, he thought that everything wasn't so terrible, that it was only necessary to revive his mother, and everything would be fine. Even if Uchiha Yue appeared in their world, he could be defeated by his mother's power.
—And now you're telling me that his mother is no match for him?" This is a joke, right?!
However…