Dosuke's original intention for developing the medical solution was to give ordinary civilians those who couldn't afford treatment a chance to benefit from healing techniques.
Even in a village like Konoha, medical resources were limited. Commoners simply didn't have the money to pay a medical-nin for treatment.
He had put the research on hold before going to the battlefield, but the attack by Sunagakure's Scorch Release user, Ye Cang, and the words of Yamamatsu Taiga had changed his perspective.
He realized that if the medical solution existed, it could save countless low and mid-rank ninja, the ones most likely to die on the battlefield. High-ranking jōnin, due to their superior strength and importance, received immediate treatment from the camp's medical-nin if injured. If the solution couldn't be mass-produced and remained limited, it would be allocated to the upper echelons first, leaving the survival rate of the lower and middle ranks unchanged.
This thought put Dosuke in a sour mood. He had hoped Tsunade might have another method, but now it seemed the task was still too difficult.
Just as Tsunade and Dosuke were about to give up on solving the production issue, a gentle, ethereal voice spoke.
"Tsunade, little Dosuke, are you troubled by the blending of this liquid?" The immense form of the Slug Sage slowly shifted closer, its attention on the test tubes before them.
"Great Sage! Can you prepare it?" Dosuke was the first to react.
Of course! When he had trained in the Shikkotsu Forest, the Slug Sage had been the one to prepare the legendary Hero's Water. If it could create that, surely it could blend the base solution for the medical solution.
The thought instantly lifted his spirits. With a start, Dosuke stood up and grabbed the test tube.
"Great Sage, please see if you can replicate this liquid!"
Seeing Dosuke's actions and hearing the Slug Sage's question, Tsunade also caught on. She rushed to the Sage's side.
"Very well," the Slug Sage said, sensing the liquid in Dosuke's hand. Its ethereal voice held a note of calm assurance.
Hearing those words, despair turned to exhilaration.
"Did you hear that, Sensei?!" Dosuke exclaimed.
"I heard it!"
Just when hope seemed lost, a new path had appeared.
"Hahahahaha!"
"Hahaha!"
Tsunade grabbed Dosuke and spun him around in a circle.
The Slug Sage watched the two celebrating with a gentle, lidded gaze.
"Great Sage, how much of this liquid can you produce in a day?" Tsunade asked loudly, having set a dizzy Dosuke back on his feet.
"I am not entirely certain, but it should suffice for your needs." The Sage's voice was music to Tsunade's ears.
As expected of a sage who has lived for millennia. Amazing! Tsunade looked at the immense slug with admiration.
Upon testing, perhaps because the medical solution incorporated fluids secreted by slugs, the Slug Sage proved extraordinarily adept at its production. It could create a vast quantity of the base liquid in a single batch.
By Tsunade's estimate, it was enough for about a thousand bottled doses. Currently, the Konoha force on the Sunagakure front numbered around 5,000 ninja. Excluding logistics personnel, it could essentially mean one dose for every frontline fighter.
Looking at the chakra-gathered liquid before her, Tsunade was thrilled.
"Sensei, the next task will be organizing Konoha's medical-nin to produce the healing chakra seals," Dosuke said to her.
On the Land of Rivers battlefield, the medical-nin's chakra was already stretched thin treating the wounded. The best solution for producing the seals was to have the medical-nin at Konoha Hospital handle it. In the future, Tsunade would perfect such seals herself, even developing the S-Rank Strength of a Hundred Technique. Sealing techniques wouldn't pose a problem for her.
While Tsunade was attempting to blend the solution earlier, Dosuke had explained the seal formula for the Mystical Palm Technique to her. The true difficulty had never been the seal itself, but achieving the precise ratio of the base solution.
"Don't worry, Dosuke," Tsunade said, her mood visibly brighter now that the solution's production was solved. She gave him a thumbs-up, winking with one eye and grinning to show her white teeth. The expression made her look youthful, playful, and charming.
"Sensei, I should return to the front. If anything comes up, please have Charan contact me." With the liquid problem resolved, a weight had been lifted from Dosuke's shoulders.
Without waiting for a formal goodbye, Dosuke formed the seals for the Reverse Summoning Technique.
Poof!
He vanished, returning directly to the Konoha camp.
"Now that the medical solution issue is resolved, we can essentially supply one to every fighter." Dosuke nodded to himself in satisfaction.
This news needed to be relayed to Orochimaru immediately, it would be crucial for planning the next phase of the campaign.