Inside the laboratory.
Shihōin Naraku and Tsunade watched Jiraiya, who had just had his left arm attached.
The arm had been grown from Jiraiya's cells and Hashirama cells.
"It looks a little strange..." Jiraiya remarked, examining his left arm.
"It's healing quickly. Now we'll have to see whether Jiraiya can adapt to it."
"If there's no significant rejection, that means the experiment was a success."
A wisp of pale smoke rose from the severed area, and the wound where the left arm had been attached had already begun healing at a speed visible to the naked eye.
This was what made Hashirama cells so powerful.
Whatever else they offered, this rate of recovery was truly incredible.
To attach this left arm to Jiraiya's body intact, the site of his severed arm, which had already healed, had been torn open again.
This was to allow nerves, muscles, and other bodily tissues to connect with Jiraiya's new arm.
It looked somewhat bloody, but with the enhancement provided by the arm containing Hashirama cells, the injury healed extremely quickly.
Tsunade looked with satisfaction at Jiraiya, who no longer showed any sign of injury, then began examining him.
"No problems. It's healed quickly and well."
"Actually, my own recovery was pretty impressive to begin with." Faced with Tsunade's kindness, Jiraiya knew she was concerned about him, but still could not resist making a remark.
"Shut up!"
Tsunade shot Jiraiya a fierce glare, the warning in her eyes unmistakable.
This idiot. The Fourth Shinobi World War was about to break out. Enhanced recovery was practically another guarantee of survival in wartime.
So many people wanted an opportunity like this and couldn't get one.
"Let's observe him for two days first. The previous experiments were very successful, but we still need to take rejection seriously."
Seeing