In Amegakure, once the shadow of war had passed, the ceaseless rain once again became the defining rhythm of the little village.
Unable to withstand Obito's repeated urging, Naruto finally accepted Asura's invitation to talk face-to-face.
From Obito's misery, Naruto was certain their meeting would be a battle of words, so he did some homework, gathering ancient documents from various regions and brushing up on the history of Ninshu.
The following evening, in an Amegakure teahouse, the first and last Asuras held a historic meeting.
True to his reputation as the founder of Ninshu, Asura opened with a lofty question. "Naruto, what do you think war can bring people besides pain and misfortune?"
Naruto immediately realized that he had come looking for a fight.
The worst thing he could do in a conversation was let the other person dictate its pace. He had to seize the initiative.
So Naruto swirled his teacup and asked unhurriedly, "Asura, how did you prevent illness in your era?"
For a moment, Asura could not figure out what Naruto meant by that question, but he still answered earnestly. "Ninshu had ninjutsu developed specifically to treat illnesses. They could cure disease and ward off afflictions..."
Naruto smiled faintly. "But those were only emergency measures, weren't they? You only treated an illness after someone fell sick."
Asura nodded. "Yes."
Naruto took a small sip of tea and said, "But in our era, there's a way to prevent illness called a 'vaccine.' It works by introducing a tiny amount of a pathogen into the body, causing it to produce antibodies and preventing the illness from developing..."
Asura said, "That..."
Naruto returned to the original question. "War works the same way. Small-scale, targeted wars can serve as rehearsals for future wars, allowing us to use war to prevent war..."