The wound healed before their eyes. In three seconds, not even a scar remained.
"See? That's the healing effect of yang release chakra." Uchiha Makoto wiggled his finger. "The Yang Seal stores that energy for use in battle. It lets you heal injuries quickly and reduce side effects."
Kakashi stared at his finger in silence.
On the third day, he explained how the two poles worked together.
"The Yin Seal stores chakra, and the Yang Seal stores life energy. Sounds great, right?"
He formed hand seals, casting the Water Ball Technique in one hand and the Fireball Technique in the other.
Two small balls hovered above his palms, one giving off cold vapor, the other radiating heat.
"Just like this," Uchiha Makoto said. "Water in the left hand, fire in the right. You have to keep them balanced. Too much on one side and too little on the other, and they'll explode."
He carefully controlled the two balls, keeping them stable.
Kakashi watched with a deep frown.
"That's difficult," he said.
"Extremely difficult." Uchiha Makoto nodded. "That's why it takes incredible control. And..."
He paused, then added, "You need a special constitution. If an ordinary person tried this, their chakra pathways would have ruptured and killed them long ago."
"And you can do it?" Kakashi asked.
"I can." Uchiha Makoto grinned. "Why else would I research this? Do I have a death wish?"
Kakashi fell silent.
Whether he believed him, Uchiha Makoto couldn't tell.
On the seventh day, Uchiha Makoto demonstrated a prototype of the "Instant Burst Style."
He found a rock about half a person's height, stood three meters away, and took a deep breath.
He clenched his right fist, gathering chakra around it, compressing it, then compressing it again.
Then he threw a punch, but not directly at