My Fire Style turned transparent?

He thought, picked up his pen again, and wrote "Phoenix Sage Fire," "Phoenix Flower Crimson Claw," "Dragon Flame Song," "Great Fire Annihilation" in his notebook... When he had time to experiment later, he would observe the "paths" of these Fire Style ninjutsu.

Yakushi Nonō came in carrying a lunchbox. It contained rice, pickled cucumbers, and two thin slices of ham.

"Thank you," Uchiha Kin said politely, taking the lunchbox and immediately starting to eat.

He ate without any ceremony. Unlike others who habitually put their hands together and said, "Itadakimasu" (I will eat), he didn't have any preamble. Yakushi Nonō watched him wolf down his food, a faint smile appearing on her face.

Yakushi Nonō teased, "Every time I see you eat like a ninja, I find it amusing. Are you afraid it'll run away?"

"Yes, I do think that," Uchiha Kin replied casually.

"I heard from Jasmine that when you spar at school, you never form hand seals..." She started laughing herself as she spoke. This kind of "playing by ear," ambushing, and tricking was truly ninja-like. She sat down opposite Uchiha Kin, resting her chin on her hand. "I just did a quick check of the wards on my way here. You don't need to go after you finish eating."

Uchiha Kin paused. "Why didn't you say so earlier? I already checked once when I came, and then I came to see you."

"You didn't say so earlier!" Yakushi Nonō was also speechless. After a moment's thought, she understood. "Were you deliberately playing a trick on that ninja who was following you?"

"I didn't! Don't talk nonsense! How could a Konoha ninja like me, with such a strong Will of Fire, do something like tricking a comrade?"

"Impossible, absolutely impossible!" Uchiha Kin would never admit to such an accusation.

After finishing breakfast, Uchiha Kin stood up and said, "Nonō, I'm leaving." He turned back, grabbed his notebook, and found a secluded spot in the field hospital to begin his experiments.

He moved his four Byakugan to different positions as needed for observation, dividing them into four parts for monitoring.

Then, without forming any hand seals, relying solely on his experience and willpower, he slowly guided his chakra, making it move along the planned path.

Under the surveillance of his Byakugan, he carefully manipulated the chakra. From the very beginning, it started only at the designated point in the chakra pathway and moved along the correct route. There was no loss of chakra whatsoever throughout the entire process, and it flowed out smoothly.

Fire erupted from Uchiha Kin's mouth. The air seemed to distort slightly, and a transparent, tongue-like flame was released.

Then, this distortion rolled and formed a sphere about two meters in diameter, resembling a piece of transparent jelly. The light passing through it distorted the scenery. A wave of intense heat washed over him, scorching hot.

"This, is the Great Fireball Technique?" Uchiha Kin frowned, somewhat surprised.

Normally, no, all the Fire Style ninjutsu he had seen had flames that were either orange-red or bright yellow. But this transparent flame was...

Relevant knowledge flooded his mind: That's right, the transparency of the flame was related to the burning material, how completely it burned, and whether there were impurities in the fuel!

Logically, Uchiha Kin thought, "Ordinary Fire Style ninjutsu, because it doesn't start from this correct path, its chakra isn't pure but mixed.

"With impurities, it has that obvious flame color. Mine, however, is from a single path, the chakra is pure, and it burns completely, hence it's almost transparent."

Uchiha Kin closed his mouth, and the flames immediately stopped. The fireball, lacking a continuous supply, dissipated instantly.

After analyzing the direct chakra data observed by his Byakugan, Uchiha Kin reached a conclusion: "The chakra consumption is one-twentieth of the conventional Great Fireball Technique, yet the pressure on the meridians is the same.

"Therefore, using the same Great Fireball Technique, with me as the standard, if I use this method to perform twenty of them now, it would be equivalent to one of the old ones."

This kind of sustainability was a revolutionary improvement to a ninja's combat power. Ninjutsu that others considered a trump card for critical moments, he could now use as a regular move.

Next, he proceeded to the next experiment. He stuck a kunai into the ground and sprayed a stream of transparent flame onto it.

The kunai turned red in an instant and melted into molten iron.

"So fast?" Uchiha Kin was surprised.

Then, he took out his notebook and calculated the flame's temperature based on the time it took for the kunai to melt.

3200℃

"This temperature... it's more than half higher than ordinary Fire Style ninjutsu. This power is astonishing."

Afterward, he observed the various Fire Style paths recorded in his notebook one by one and discovered that their overall paths were actually consistent.

There were only minor variations in some places, such as deviations from one meridian to another, involving other areas, etc. But overall, they were consistent with the correct path.

He recorded them one by one, then put away his notebook and pen. His Byakugan had already spotted a nurse approaching him. The nurse ran over and reported, "Lord Kin, hurry over and take a look! Those three patients from yesterday have woken up."

"Alright," Uchiha Kin replied. He then supplied more chakra to his Byakugan, allowing him to see through the tent and spot Tiger, Deer, and Sheep—three individuals merged into one. He couldn't discern their expressions, but they appeared agitated.

He followed the nurse quickly and entered the tent. Tiger was about to stab himself in the throat with a kunai but was stopped. Among the other two, one was trying to run out, while the other was yelling, "It's all your fault! You're the ones who...

"I don't want to be a monster! Why did you turn me into such a monster? Did you ever consider my feelings?"

As soon as Uchiha Kin entered, he glanced at the three and said, "What's all the shouting about? This is a field hospital. We don't have time to grow human skin for you, nor can we possibly skin someone else to give to you for your sake!

"And the three of you, being able to break down, make a scene, and curse like this, it's because of me—because of me, you are still alive.

"For these few skins, some lightly injured ninja in the hospital risked danger to hunt in the mountains. They worked hard to bring them back for you.

"Does your attitude honor the sacrifices of your comrades?" Uchiha Kin's questioning silenced the three.

Yakushi Nonō also arrived promptly and asked, "What's going on?"

Uchiha Kin said, "I'll handle it." He looked at the three and gave them a choice, "Now, you can think about it yourselves. If you don't want this fur, it's easy; just take it off.

"However, I must remind you. This animal fur provides you with considerable defense, and when combined with certain ninjutsu, it will have remarkable effects.

"If you choose not to have it, you will give up this advantage in ninjutsu. Of course, you will also return to your previous state.

"It—you—can choose. You haven't become monsters."