Although Araki and Nagato had discussed quite a lot in Nagato's mental world, communication in the mental world was not the same as in the physical world. It depended entirely on the speed of thought.
In the real world, it might take several seconds for a person to say a single sentence, but forming that sentence in the mind might require only milliseconds. All the other time was lost in the process of converting thought into bodily movement and finally producing sound.
So, despite how much they had talked and for how long, in reality, in the eyes of Kakuzu and Zetsu, all of it had taken only a few breaths.
They saw the translucent Araki emerge from Nagato's body, turn into a streak of light that scattered the huge Water Ball suspended in the sky, and merge back into his own body.
Then Nagato's next actions left the two of them baffled.
He clearly looked completely uninjured, yet he no longer continued attacking. Instead, without saying a word, he flew back in the direction he had come from.
"Leader,"
Kakuzu looked somewhat confused and could not help asking, "Where are we going?"
"Back to the Land of Rain."
Nagato's voice was as cold as ever.
But for some reason, hearing that icy tone suddenly gave Kakuzu a sense of reassurance.
"What about the Three-Tails and the Six-Tails?"
Zetsu also could not help asking about the subject he cared about most.
"We cannot capture them."
"Why?"
"Because I am no match for Araki."
"How could that be!"
This exchange shook Kakuzu deeply.
Ever since he had joined the Akatsuki, he had witnessed the unmatched power of the Rinnegan with his own eyes many times. It truly was a power great enough to make him sincerely submit, and calling it divine