Before Tsunade could even react, Orochimaru reached out and yanked up her sleeve, then immediately drove the needle straight into her arm.
At the same time, he explained, "I've already tested the 'Hashirama No.1' serum many times. There definitely won't be any problems."
Hearing this, although Tsunade still had a trace of doubt in her heart, seeing how confident he was, she temporarily set her worries aside.
However, when she heard what Orochimaru said next, she couldn't help but feel speechless, even rolling her eyes.
"If something really goes wrong beyond my calculations, killing you and reviving you again would be the simplest solution."
Orochimaru's tone remained cold and indifferent, as if human life in his eyes was nothing more than pieces on a board to be manipulated at will.
Even though she was dissatisfied with his extreme attitude, Tsunade knew very well that when it came to matters like this, Orochimaru never lied.
After all, when it came to scientific research and experiments, he had always been extremely rigorous and serious.
At that moment, Orochimaru quickly pushed the syringe into Tsunade's body. The whole process only took a little over ten seconds.
Immediately after, without the slightest pause, he picked up another dose of "Hashirama No.1."
He stabbed it straight into Nawaki's arm and completed the injection at an extremely fast speed.
As the drug gradually entered her body, for the first half minute, Tsunade didn't feel anything unusual.
But just after those thirty seconds passed, she suddenly felt a surge of heat rising from within, her body temperature rapidly increasing.
As the most professional medical ninja, Tsunade immediately noticed the changes in her body.
After making a quick assessment, she was shocked to find that her body temperature had risen by at least three degrees.
Such a temperature clearly fell into the range of a high fever.
Not only that, Tsunade's body also began to show other symptoms of discomfort: A faint sense of weakness spread throughout her body, every muscle aching as if it had been struck hard by a heavy hammer.
In just a short moment, the previously energetic Tsunade became like a wilted plant, her entire body suddenly turning listless.
Beads of sweat rolled down from her forehead, soaking her hair.
Nawaki, standing beside her, had a completely different reaction. He only felt a warm, comforting sensation wrapping around him, as if he were basking in gentle spring sunlight.
That warmth flowed through his limbs and body, making his already heavy eyelids even harder to keep open.
Finally, his head slowly drooped, his eyes closed, and he fell into a deep sleep.
Orochimaru glanced at Nawaki and gave a slight nod, a look of "just as expected" flashing through his eyes.
Then, unhurriedly, he began connecting various monitoring instruments to the two of them.
After everything was set up, Orochimaru stared at the constantly changing data on the screen. After thinking for a moment, he turned to Rengoku and said, "Based on the current monitoring results, Nawaki is fine. He has entered the first type of evolution response. Once he wakes up, he will return to normal."
After that, Orochimaru shifted his gaze to Tsunade, "Tsunade's condition is different. What she's showing is the seventh type of response, so you'll need to supply her with life force."
At this moment, Tsunade felt as if all the strength in her body had been drained away. Her body grew softer and weaker by the second.
Even speaking became difficult, "If it's about replenishing life force, wouldn't drinking the Water of Life be enough? Why does it have to trouble Rengoku?"
Orochimaru let out a light snort, "In your current physical condition, you simply can't effectively digest and absorb the energy contained in the Water of Life."
"You can only be supplied with that kind of attribute-less life force. That's the only way to ensure your safety and the effectiveness of the treatment."
Tsunade knew that her body really didn't feel well right now, so she stopped arguing with Orochimaru and simply nodded lightly.
A glow appeared in Rengoku's hand as he placed it against Tsunade's chest.
In theory, the Dragon Life Reincarnation Technique could input life force through any part of the body, but in practice, delivering it through the body's center allowed for the fastest recovery.
Because the internal organs distributed energy throughout the body.
But Tsunade's front was really hard to work with. Her chest was too large, so Rengoku deliberately moved his hand slightly higher to avoid touching it.
When Rengoku officially activated the Dragon Life Reincarnation Technique, a strange feeling instantly rose within him.
He felt as if the life energy continuously surging from his body had suddenly fallen into a bottomless pit.
Tsunade's body was absorbing every bit of energy Rengoku output through the technique like a massive whirlpool.
Rengoku's expression changed, and the chakra in his body began to surge like tides.
Karin, standing nearby, noticed something was wrong and quickly stuffed her arm into Rengoku's mouth.
At this moment, Rengoku had no time to worry about whether this would leave bite marks on Karin's arm.
Because he was already being drained by Tsunade's terrifying pull, his vision going dark, the world spinning around him.
Driven by instinct to survive, he immediately bit down on Karin's arm.
Karin let out a muffled groan as an indescribable sense of weakness swept through her body.
She could clearly feel the vigorous life force within her rapidly draining at an astonishing speed.
Without hesitation, Karin reached out and opened the container of Water of Life she had prepared nearby, tilting her head back and drinking it all in one go.
Although under normal circumstances, Tsunade could have recovered directly by absorbing Karin's life energy, according to Orochimaru's calculations, every time Rengoku absorbed a large amount of Karin's chakra, it would cause a certain degree of evolution in his Sharingan.
From a personal emotional standpoint, Karin strongly resisted the idea of others biting her body to extract her life energy.
Because of this, the current complicated transfer process had been formed.
At this moment, Orochimaru's eyes remained locked on the monitoring screen, not missing a single subtle change.
At the same time, his hands didn't stop moving. He efficiently lifted the unconscious Nawaki and gently placed him into a medical chamber nearby.
Then, with practiced ease, Orochimaru pressed a few buttons on the top of the chamber. Accompanied by a soft mechanical sound, the chamber slowly closed and sealed shut.
Right after that, the inside of the chamber suddenly released a cloud of pale green mist. These vapors seemed to possess some kind of special property, quickly spreading and filling the entire enclosed space.
Nawaki, who was already asleep, breathed in the mist, his breathing becoming even steadier and deeper. He looked like he was sleeping even more peacefully than before.
After successfully settling Nawaki, Orochimaru paused briefly, then turned and walked to a nearby cabinet, taking out another container of Water of Life and handing it to Karin.
The Water of Life she had just drunk had already been almost completely used up, so after taking it, she immediately drank it down again.
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