Reality swiftly dealt him a heavy blow.
Minamoto Takuya discovered the greatest flaw in Jugo's Sage Body.
He had previously thought that he was the one absorbing that Natural Energy, but that was not the case at all! The body itself had absorbed it!
Jugo's seemingly formidable "Sage Body" could not actively absorb Natural Energy from heaven and earth at all! Every influx of energy was a spontaneous, uncontrollable passive absorption by the body itself!
Although Minamoto Takuya could still forcibly mix chakra with the energy that passively entered the body, his inability to control the quantity and rate of incoming Natural Energy made it exceptionally difficult to precisely determine the perfect ratio for Sage Chakra!
Perhaps this was also the fundamental reason Jugo had never been able to master true Sage Mode!
This discovery made his heart sink, multiplying his troubles.
Sure enough, Jugo's innate physique was far inferior to the Sage Body of the First Hokage, Hashirama Senju, who could wield Sage Art with ease.
Minamoto Takuya "opened" Jugo's eyes.
Now that he had discovered this problem, there was no point in continuing. It would only accelerate the berserk transformation once the energy became uncontrollable.
Still, it was not entirely hopeless. A solution rapidly took shape in his mind.
He could create a special sealing barrier for Jugo that would isolate external Natural Energy.
Then, even if Jugo could only absorb it passively, the Natural Energy entering his body would become controllable and constant under the barrier's restrictions—limited to only the portion inside the barrier.
At that point, he could use Jugo's own chakra to gradually test and correct the proportions, solving every difficulty with ease!
His thoughts suddenly became clear, but another problem soon followed. His path of Sage Art cultivation had only just begun, yet he