What had unfolded before his eyes left Minato Namikaze shocked and horrified, yet thrilled and excited.
Those emotions mingled together, making his expression look rather strange and comical.
Then he began trying to teach his monstrous younger brother other skills.
Water Walking.
After demonstrating it just once, he watched River complete it smoothly and effortlessly. It posed no difficulty whatsoever for him.
Tree Walking.
With his body perpendicular to the tree at a ninety-degree angle, River completed this just as easily.
"Your control over chakra is just as practiced and refined."
Minato Namikaze gaped, utterly dumbfounded.
"Do you have any training that's more challenging?"
"This doesn't seem very difficult."
River spoke with a smile.
Minato Namikaze was speechless. Looking at his younger brother, he felt that River was a monster. He had never seen anyone with such an incredible ability to learn.
Even the ninjas hailed as geniuses in Konoha lacked River's terrifying capacity for learning.
"Once I get back, I'll help you keep training."
In the end, Minato left those words behind and departed the courtyard.
A smile on his face, River watched his newfound older brother leave before finally looking away.
"This body is still nowhere near its limits."
"It's also a long way from the physical condition I had in the Pirate world!"
River spoke softly.
He needed to keep conditioning this body. At the very least, it couldn't fall too far short of his previous one.
So River made a set of training weights, strapped them to his back and limbs, and began putting his body through a grueling regimen.
He had undergone this kind of training before.
The training at Marine Headquarters was brutal. The conditioning of the human body was beyond imagination, demanding every ounce of effort to squeeze out its latent potential.
The