Sasori cooked.
This was something that had taken Finn a week to fully accept and that Orochimaru was encountering for the first time. A man who had excised his own living heart and embedded it in a puppet body, who had no digestive system and no need for nutrition, who would never experience hunger again — this man set down his research with unhurried care whenever mealtime arrived, went to the kitchen area of the base, and prepared food with a level of attention and craft that suggested he had been doing it for years before he stopped being able to eat.
He watched from the side while Finn and Kakuzu ate. He didn't speak much during these intervals. But the quality of his attention had a particular character — not observation, exactly, but something closer to satisfaction. As though the act of preparation was sufficient in itself, independent of any personal participation in the result.
Orochimaru looked at the food, then at Sasori, then ate without further comment. Some things were simply easier to accept than to understand.
"Now that the Third Raikage situation is resolved," Orochimaru said, after a few minutes of eating, "I'd like to return to the question of your blood."
"I was waiting for that," Finn said. He took another bite and swallowed. "I'll cooperate fully. No dissection, but aside from that, ask whatever you want. Honestly, I'm curious what you'll find."
Orochimaru set down his chopsticks slightly. "You don't know the mechanism yourself?"
"I know what I am. The mechanism is something I've never had anyone qualified to explain to me." Finn looked across the table. "We're partners now. I don't need to keep this vague anymore." He paused. "Kakuzu and Sasori have achieved something like immortality, but theirs is constructed — external methods, replaceable components, maintained through ongoing effort. Mine isn't any of those things. I don't use techniques. I don't replace parts. I don't need to do anything. The state just... is. I am the immortality, not something that achieved it."
The effect on Orochimaru was immediate. His eyes had the quality of someone seeing a door open in a wall they had assumed was solid.
Kakuzu and Sasori both glanced at Finn with expressions that carried the specific quality of: we suspected as much. The age revelation, the blood sample's behavior, the things Orochimaru had said about the vitality in the sample — the pieces had been sitting in front of both of them for some time.
"Natural immortality," Orochimaru said. "Inherent rather than acquired." He picked up his chopsticks again, took a distracted bite, and chewed without appearing to notice he was doing it. "How many people like you exist?"
"In the world I come from? At least twenty that I know of personally. Probably more."
"Twenty." Orochimaru paused. Then: "What world you come from?"
There it was. Finn had known the phrase would catch someone.
Kakuzu set his bowl down and said, without any particular urgency, "I've had questions about this for some time. Haki isn't in any record I've encountered in decades of moving through the ninja world — not in ancient texts, not in classified village archives, not in anything I've found in the dark world. The power simply doesn't exist here. And when we first met, your height was wrong. It decreased over months, and it's been normal for a while now, but the early months were inexplicable." He looked at Finn levelly. "You're not from this world."
Sasori's expression had moved from attentive to something that was working through the full implication in real time. Not from this world. Older than he looks, by twenty years at minimum. A power system that leaves no trace in any local records. A blood sample that behaved like the laws of cellular biology didn't apply to it.
Finn looked at the three of them and made a decision he had been building toward for some time.
He wasn't going to tell them he was a transmigrator — that he had lived a previous life in a world that was neither this one nor the pirate world, that the question of his origin had multiple layers. That was too complicated and too private. But the alien framing was serviceable, accurate in the important respects, and considerably simpler to work with.
"The ninja world," he said, "is a planet. One planet, in a universe that contains an effectively uncountable number of them. Some develop life. Some develop civilization. I come from one of those — a world almost entirely covered by ocean, where the sea defines everything about how people live and how power works." He paused. "Before I arrived here, I was an Admiral of the Marine. The Marine is the dominant military organization of my world. An Admiral is one of its three highest combat positions."
"What's an Admiral?" Sasori asked.
Kakuzu and Orochimaru both had the expressions of people who had already moved past that question toward the more interesting ones.
"I'll explain it to you separately," Finn said to Sasori. "The short version is that it's equivalent to being one of the three or four strongest military figures in the world, responsible for enforcing order across most of the known ocean." He looked at Orochimaru. "You were going to ask about immortality, not my rank."
"Yes," Orochimaru said immediately. "The mechanism."
"In my world, there are objects in the ocean called Devil Fruits. Each one contains a unique power — some elemental, some physical, some stranger than either. Eating one grants the ability. One of those abilities, the rarest category, produces genuine immortality. In my world, there's a legend about a Fountain of Youth — anyone who drinks from it gains eternal life and stops aging. The legend turned out to be accurate. I drank from it."
He watched Orochimaru's face process this — the initial acceptance, then the skepticism underneath it, visible even through Orochimaru's considerable control over his own expressions.
"I know how that sounds," Finn said. "But consider: you're looking at a forty-one-year-old man who appears to be in his twenties. You've examined blood that retained full cellular activity after three weeks in a standard container. And I know something about this world that most people in this world have forgotten, which I'll get to in a moment. The evidence is what it is."
Orochimaru was quiet for a moment.
"You said there's at least one more immortal in this world," he said.
"Yes. Not from here either, and sealed away in a location most people would find surprising." Finn looked around the table. "Have any of you heard the name Kaguya Ōtsutsuki?"
Kakuzu and Sasori both shook their heads.
Orochimaru thought for a moment, then said slowly, "There's a figure — in very old texts, mythological in character. The Rabbit Goddess. I've encountered the name a few times in research, but the references are fragmentary. She's essentially a piece of ancient folklore."
"She's not folklore," Finn said. "She's an alien. She arrived on this planet thousands of years ago, from a different world than mine and traveling by entirely different means. At some point she became the most powerful being on this planet — ruled it, effectively. She was called the Rabbit Goddess because of her appearance, but her actual name was Kaguya Ōtsutsuki."
The table was quiet.
"She had two sons," Finn continued. "The elder was named Hagoromo Ōtsutsuki. You know him, even if you don't know his name — he's the Sage of Six Paths."
"The Sage of Six Paths is real?" Orochimaru said. He had the expression of someone whose model of the world was being updated faster than was comfortable.
"Completely real. Hagoromo and his brother Hamura eventually came into conflict with their mother over how this world should be governed. They fought her and won. The seal they used to contain her is the moon — the entire moon is the containment structure. She's been inside it for thousands of years, still alive, because nothing in this world is capable of killing her."
"Is she still conscious?" Kakuzu asked. It was a practical question.
"As far as I know. Though 'conscious' after thousands of years of sealed isolation is a complicated concept."
"How do you know this?" Orochimaru asked.
"That's my secret to keep," Finn said.
Orochimaru looked at him for a moment, then let it go. Everyone at this table had areas they didn't discuss fully. Pursuing it would be tactless and probably unproductive.
"I can offer you something verifiable," Finn said. "The major clans of the ninja world — the Senju, the Uchiha, the Hyuga — they all share a common origin. They're all descendants of Kaguya's lineage, through her sons. Different branches that developed different expressions of the same fundamental inheritance. If you trace the bloodline relationships carefully enough, the connections are there." He paused. "The Kaguya clan of the Land of Water is another example. Their name is not a coincidence."
Orochimaru's expression had shifted into something that was less skeptical and more genuinely engaged. This was the kind of claim that could be tested. Bloodline research was something he could actually do.
"I'll look into it," he said.
"Take your time. The evidence will still be there."
Finn looked around the table. "I'll say this plainly: the ninja world is not as stable as it looks right now. The things that are coming — the forces moving underneath the current situation — are going to make this war look like a preface. My interest in building strength isn't arbitrary. It's because I know enough about what's ahead to understand that being unprepared for it is not an acceptable condition."
"Dangerous," Kakuzu said. Not a question.
"Interesting," Orochimaru said, overlapping with him. He seemed to realize this and added, "Also dangerous, presumably. But interesting first."
Finn smiled.
Orochimaru tapped the table absently, reorganizing his thoughts. "The Fountain of Youth," he said. "You drank from it. Do you have any remaining supply?"
"No," Finn said. "I came here without any. I arrived unexpectedly — there was no preparation, no packing. Even if there had been, carrying something like that into an unknown world would have been an invitation for trouble."
Orochimaru's expression underwent a brief, suppressed movement that looked very much like someone contemplating what it meant to be within arm's reach of the solution to the problem they had dedicated their life to, and then learning it had been left behind by accident.
He recovered smoothly. "Then the research direction is clear. You are the sample." He set down his bowl with finality. "After dinner, I'll need another blood draw. And if you're willing, a small tissue sample. I want to approach this from a different angle than the initial analysis."
"Cut off whatever you need," Finn said. "I won't miss it."
Orochimaru looked at him with an expression that was as close to warm as his face typically got.
He genuinely liked this man's approach to his own body.