Surging Chakra Reserves

In the mountains, there was no sense of time; the years passed unnoticed.

Hidden away in the laboratory within this realm, Minamoto Takuya had never ceased his pursuit of power.

The journey of assimilating Hashirama Cells was his day-after-day cultivation.

In this long and arduous tug-of-war, he had already achieved a startling breakthrough.

Starting with the ordinary cell regions around the periphery, he steadily advanced as though conquering one sturdy fortress after another.

Tough organ cells had failed to stop him, and even the resilient bone cells had ultimately bowed before his will and skill.

Yet just as the dawn of victory seemed within reach, Minamoto Takuya had no choice but to temporarily halt his nearly frenzied advance.

It was not cowardice, nor was it surrender.

What stood before him were the final and deadliest barriers: the heart and the brain.

The fragility and importance of those two regions went without saying. They were life's most crucial engine and command center.

Minamoto Takuya knew full well that even with strength far beyond that of ordinary people, the slightest error during the assimilation of either area would leave him with only one outcome: utter destruction of body and soul.

Even Six Paths Madara, who had once stood at the pinnacle of the Shinobi World, had been completely stripped of his power and vitality by Black Zetsu's sinister God's One Stab when he had been closest to success, hadn't he?

That bloody lesson from the past constantly reminded him of the weight of the risk.

Besides, only by entering the legendary realm of Six Paths was there even a faint precedent for returning from the Underworld.

Like the deceased Obito Uchiha, who had returned from the Underworld and briefly lent his power to Kakashi Hatake, allowing him to use Perfect Susanoo.

But