Deep inside a dark cave, Nagato was using Yin-Yang Release to strengthen Deva Path Pain.
"ало?" Uchiha Obito appeared out of nowhere beside Nagato.
Nagato looked at Uchiha Obito, who had appeared so suddenly, and asked, "Mr. Madara, what is it?"
Uchiha Obito looked at Nagato and said gravely, "Nagato, getting around must be difficult for you now, right?"
After a moment of silence, Nagato replied, "Mr. Madara, when I forced the Demonic Statue of the Outer Path to obey me, it drained my vitality. As a result, my legs could no longer be healed."
Back then, forcing the Demonic Statue of the Outer Path to obey him had allowed it to drain his vitality. That was what had left him as emaciated as he was now.
"I know about that." Uchiha Obito nodded. "For most people, restoring vitality would be extremely difficult. But for me, it's nothing."
Nagato suddenly raised his head, which had been bowed slightly, and looked at Uchiha Obito with excitement. "Mr. Madara, is that true?"
With his legs crippled, he had become little more than a useless invalid. Before he created the Six Paths of Pain, Konan had been the one taking care of him.
If he could regain his health, Nagato certainly wouldn't pass up the opportunity.
Only when he was healthy could he bring out the true power of the Rinnegan.
The Six Paths Technique was, after all, a way of splitting off the Rinnegan's many abilities. It was a measure of last resort.
The Rinnegan's power was greatest when concentrated in its wielder.
"Of course it's true." Beneath his Tiger-Pattern Mask, Uchiha Obito's lips curled into a smile. "If we transplant Senju Hashirama's cells into you, they can make up for the vitality you've lost."
"Senju Hashirama's cells?" Nagato looked puzzled. "Wasn't