How Does The SI Obtain The Rinnegan In 'One Rinnegan To Rule Them All'?

'One Rinnegan to Rule Them All' takes a clever approach to power escalation—the SI doesn't just stumble into the Rinnegan; they engineer it. After years of studying forbidden scrolls and experimenting with chakra fusion, they discover a loophole: implanting a sliver of the Ten-Tails' chakra (extracted from a White Zetsu hybrid) into their existing Mangekyou Sharingan. The transformation sequence is wild—their original eye literally dissolves and reforms over days, with the SI hallucinating fragments of Kaguya's memories throughout the process. What I love is how the story balances the Rinnegan's absurd power with consequences; every use drains their lifespan, forcing strategic choices in battles. The way they eventually use the Preta Path to absorb a tailed beast's chakra mid-fight? Chef's kiss.

In 'One Rinnegan to Rule Them All', the SI's journey to obtaining the Rinnegan is a brutal and transformative one. It starts with a near-death experience during a mission gone wrong, where the protagonist is left bleeding out in the ruins of a battlefield. This triggers a desperate awakening of the Uchiha bloodline, unlocking the Mangekyou Sharingan in a moment of sheer survival instinct. But that's just the beginning. The real turning point comes when the SI deliberately seeks out the remnants of Nagato's chakra, hidden in the ruins of Amegakure. Through a dangerous ritual involving forbidden Uzumaki sealing techniques and a blood pact with the remnants of the Gedo Statue, they force an evolution of their eyes. The process is excruciating—like having molten lead poured into their skull—but when the pain fades, the Rinnegan's concentric circles blaze to life, granting godlike power at a terrible cost.

What makes this acquisition unique is how it ties into the lore. The SI isn't just handed the Rinnegan; they essentially hijack the natural order by combining Uchiha and Senju chakra in a way that mirrors Madara's original method, but with modern ninja-tech shortcuts. There's a fantastic scene where they use stolen Hashirama cells from Orochimaru's labs to catalyze the transformation, their body nearly disintegrating from the conflicting energies. The author does a brilliant job showing the psychological toll too—the Rinnegan's visions of the Sage's memories nearly shatter the SI's sanity before they learn to control it. By the time they master the Deva Path abilities, you can see how this power reshapes both their combat style and their role in the ninja world's shifting politics.