"Here. The heart is the source of chakra circulation and the core of life force. Implanting Hashirama Cells here will let them integrate with your body to the fullest extent, allowing the power of the Sage Body to permeate every inch of your flesh and blood, and even... directly affect your Sharingan."
"Then here it is." Toru Kujyo agreed without hesitation.
Kabuto Yakushi adjusted his glasses, took an emerald-green test tube from the metal case beside him, and fitted it into the precision Injection Apparatus. The needle gleamed coldly beneath the lights.
"First vial, 97.3% purity. Beginning injection." Kabuto Yakushi's voice was calm and professional as he deftly inserted the needle into the skin on the left side of Sasuke's chest.
The emerald-green liquid flowed in slowly. Sasuke let out a muffled grunt, feeling an icy yet savage life force surge into his body through the needle. Like a primordial beast waking from its slumber, it tried to tear down the existing order within his body.
Orochimaru and Kabuto Yakushi stared fixedly at the monitor beside them. Heart rate, blood pressure, chakra fluctuations... every reading was fluctuating wildly, yet the magnitude of those fluctuations remained eerily below a critical threshold.
"No rejection..." A trace of disbelief crept into Kabuto Yakushi's voice. "Even a clone of the First Hokage would suffer severe rejection upon first exposure to Hashirama Cells of such high purity. His body... actually accepted this power perfectly?"
"A genius... this is a true genius!" Orochimaru's breathing quickened, an obsessive gleam shining in his eyes. "The Uchiha Clan's powerful Yin Release Chakra has achieved such a perfect balance with the Yang Release power of the Hashirama Cells! Incredible. This is simply the most perfect body since the Sage of Six Paths!"
They did not know that this was not