"Kabuto." Chisen spoke the name in exactly the same tone he used to deliver a diagnosis at the operating table-not a guess, but a confirmation. "The word 'vessel' has a specific definition in Kabuto's research framework.
He conducted extensive God Tree cell transplantation experiments in his underground facility in Pheasant Feather Valley. The core of those experiments was to encase God Tree chakra in a vessel capable of holding it.
He mentioned that goal in his notes-creating a new vessel capable of fighting a tailed beast jinchuriki head-on.
We assumed he had stored all his experimental data in the deepest levels of the underground facility, and that it had been buried when the main root was severed.
But if he had another experimental site outside his Pheasant Feather Valley base-" "The Nameless Island in the Land of Water," Neji finished for Chisen. "After we interrupted Kabuto's research in Pheasant Feather Valley, if he still had a backup facility elsewhere, he could easily have accelerated his experiments in the time since the valley fell.
With more than three weeks and the living God Tree cell samples still in his possession, he had enough time to advance a half-finished subject to the point where it could produce a tailed-beast-level chakra burst."
"But where would he get a vessel that could hold tailed-beast-level chakra?" Tenten cut in from beside them. Her voice was quiet, but direct. "Jinchuriki need a special constitution. Not just anyone can withstand that much chakra.
Even Konoha's Nine-Tails Jinchuriki, Uzumaki Naruto, can only contain the Nine-Tails because he has both the Uzumaki Clan's bloodline and the Fourth Mizukage's Sealing Jutsu supporting him.
Where would Kabuto find someone with that kind of constitution?"
The question silenced everyone for a moment.
The sound of rain swelled again, filling the gap.
Chisen