Seigetsu Senju and Mei Senju studied the formula Kawadera Uchiha had provided.
Mei Senju stared at the formula and said quietly, "Seigetsu, there were once some rumors within the clan. Later, the Second Lord sealed them away, so ordinary clan members never learned of them."
"What rumors?"
"The Second Lord secretly conducted a large number of human experiments during a certain period, obtaining a great deal of extremely important experimental data.
Those experiments were cruel. At first, I didn't believe the Second Lord was that kind of person and thought they were rumors spread by the Uchiha Clan.
However, after studying medical ninjutsu for so many years, I began to understand.
Those rumors might have been true.
I believe the most important evidence is that the Senju Clan's level of medical ninjutsu suddenly skyrocketed during a certain period, reaching an entirely new level.
Ordinary medical ninjutsu can only treat conventional injuries. Data from extreme situations is even more important.
In the end, medical ninjutsu still has to obtain data from human bodies."
Seigetsu Senju nodded repeatedly. It seemed the Second Lord was not as honorable as the propaganda made him out to be.
The Second Lord promoted the Will of Fire and turned the Senju Clan into its standard-bearer, yet he himself committed such cruel acts as human experimentation.
What he said and what he did were completely contradictory, yet the Senju Clan could now only follow his teachings.
Mei Senju said, "As far as I know, the Second Lord's serums were divided into three levels. The higher the level, the more potent the effects.
The first level is this kind of conventional stimulation serum.
The second level was supposedly made using the Katsuyu Sage's mucin body fluid.
And there was another kind..."
Seigetsu Senju was astonished. This stimulation serum,