Orochimaru's research on the Sharingan could be described as highly advanced and meticulous.
When members of the Uchiha clan experience intense emotional stimulation, their brains release a unique chakra that directly affects their eyes. In this state, the pitch-black pupils transform into blood-red tomoe patterns.
Generally, the Sharingan awakens as a single tomoe in each eye. However, individuals with exceptional talent and a high affinity with chakra can skip stages. Under significant trauma or emotional stress, they may directly awaken double tomoe, or even triple tomoe Sharingan.
In the original records, Sasuke awakened his Sharingan with a single tomoe during the night of the Uchiha clan massacre. On the other hand, Obito Uchiha activated his with two tomoe right from the start. Curiously, Obito never displayed a three-tomoe Sharingan. After witnessing Rin's death, he jumped straight from a two-tomoe state to the Mangekyō Sharingan.
Of course, the most astonishing case is the Sage of Six Paths, Hagoromo Ōtsutsuki. He evolved his Sharingan from a three-tomoe pattern directly to the Rinnegan. But that makes sense; he was the son of Kaguya Ōtsutsuki, the progenitor of chakra herself.
Orochimaru was confident in his theory that the ultimate evolution of the Sharingan is the Rinnegan.
Now, in his possession, he had an actual pair of Rinnegan.
With this invaluable sample, along with the cloning technology Kurama had shared earlier, Orochimaru was ecstatic. He extended his long tongue, licking his lips with anticipation.
There was potential for these Rinnegan to become reproducible.
Still, even with the possibility of mass production, Orochimaru knew the reality was more complex. How many bodies could withstand the divine power of the Rinnegan?
Nonetheless, the research possibilities thrilled him. Since working under Kurama's guidance, Orochimaru had shifted from his obsession with achieving immortality and hoarding power, to uncovering the fundamental truths of chakra and reality.
He believed the era of shinobi was destined to be replaced by an era of knowledge, of science. That belief only intensified with every discovery.
Kurama handed him the Rinnegan and clapped his hands. "Go on, Orochimaru. You're the best man for this."
"Thank you, Lord Kurama," Orochimaru replied, bowing. His eyes glimmered with determination. He would not let Kurama down.
He remembered vividly the previous experiment where Kurama demonstrated cloning: creating a perfect replica of Orochimaru himself. To Kurama, the legendary Rinnegan seemed no more valuable than standard ninja tools like kunai or shuriken.
And yet, Kurama had entrusted them to him.
Once Kurama left the Root laboratory, he headed to Konan's safehouse.
"Lord Kurama, you're back," Konan greeted him with a warm smile.
"Yeah, everything's pretty much wrapped up. What, did you miss me already?"
Kurama grinned, lifting Konan's chin with a smirk.
Konan answered seriously, "I still don't think this ends with Nagato. There's someone behind all of this."
"Ah, you mean the masked man."
Kurama chuckled. The man behind the mask wasn't worth stressing over. There were bigger matters to deal with.
Later that night, Kurama used his chakra to help Konan recover physically. She shot him a playful, exasperated glance.
"Lord Kurama, go mess with someone else for a while. If this keeps up, my body won't be able to take it."
"Next time, I promise, I'll be gentle... maybe."
He eventually returned home — Kushina's place. As he stepped inside, he paused, surprised.
Tsunade, Kushina, and Mikoto were all gathered in the living room.
Tsunade and Kushina stood confidently, arms folded across their chests, while Mikoto looked bashfully away, cheeks tinged pink.
"What's going on here...?"
Kushina smiled. "Welcome back, Lord Kurama."
"Yeah, welcome home," Tsunade added with a mischievous glint.
Kurama sniffed the air. A rich, aromatic smell wafted from the kitchen.
A feast had been prepared. The three women had cooked an extravagant meal for Kurama to celebrate his victory over the Six Paths of Pain.
Kurama blinked.
Seriously?
Those reanimated puppets barely even warmed him up.
Honestly, he believed Tsunade, Kushina, and Mikoto together could have taken down Pain without breaking a sweat.
Still, he wasn't one to turn down a celebration.
After dinner, the four of them sat outside, leaning back in their chairs, watching the stars.
Mikoto broke the silence. "Lord Kurama, Obito has left the clan. No one has seen him since."
"He's now officially labeled an A-rank missing-nin," Tsunade added. "Still no leads."
Kushina lowered her gaze. "He was manipulated by someone in the shadows."
"Manipulated?"
Kurama decided it was time to let them in on some of the truth.
He told them about Infinite Tsukuyomi — the genjutsu that would trap the world in a dream.
Of course, he withheld details about Rin, and more importantly, his deeper intentions surrounding the revival of his mother, Kaguya Ōtsutsuki.
Revealing everything at once would only overload them. Truth needed to be dispensed gradually.
"Infinite Tsukuyomi... there's such a concept?" Mikoto murmured, her brow furrowed.
The idea unsettled her. That someone from the Uchiha clan could be so deluded, so childish, as to believe in such a world.
"Kurama-sama," Kushina said firmly. "Next time, let's find this Zetsu and Obito brat together. Let's drag them out of their holes. It's boring when rats keep hiding in the dark."
Kurama smirked. "Sounds fun."
Tsunade, however, had other plans.
This whole dinner was part of her setup. She had arranged for Kushina and Mikoto to be there for one reason.
Revenge.
"You've had your fun," Tsunade whispered near Kurama's ear. "But tonight... it's your turn to cry."
Kurama raised an eyebrow, amused.
Tsunade cracked her knuckles, and both Kushina and Mikoto moved closer to him.
"You used to bully me alone," Tsunade said, her voice low and serious. "But now, it's three against one. And don't you dare call us unfair. You're Lord Kurama, after all."
Kushina grinned, "Yeah, this time I'm not siding with you. Tsunade said if I do, she'd call me a traitor."
Kurama tilted his head toward Mikoto. "And you? Surely they pressured you into this. Right? Blink twice if you need rescuing."
Mikoto's face was beet red. Her head lowered until her chin nearly touched her lap.
She exhaled, ready to respond.
But before she could utter a word, Kushina tugged her over.
The trap had been sprung.
Lord Kurama... may the gods have mercy on your soul tonight.
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