Eye of Heaven vs. Sharingan

"Come on, you ugly thing, this princess is going to beat you into a real dead fish," Fini said to Kisame, puffing out her chest.

"This is exciting! Even though you're a woman, I won't hold back. I'll show you that being ugly doesn't mean you're weak." Kisame roared, immediately pulling out his Samehada.

The two of them circled around Issui and Itachi at a distance and went off to fight.

Issui said to Itachi, "Now we can fight with all our might. When I first came to Konoha, you hadn't defected yet, and you were always considered a genius ninja. You graduated from the Ninja Academy at age 7, ranked first in the entire academy, Sharingan at age 8, became Chunin at age 10, joined the Konoha Anbu at age 11, and became the head of the Konoha Anbu at age 13. You were truly an amazing genius. As for me, in order to catch up with you and Kakashi-senpai, I successfully awakened the first stage of the Bloodstained Eye of Heaven at age 6, graduated from the Ninja Academy at age 8 and became Genin, became Jonin at age 10, and became Special Jōnin at age 11. People say that geniuses admire each other, and I've been wanting to spar with you for a long time, Itachi!"

"Is that so? You're not bad either. Do you really want to fight? I don't want to fight you." Itachi sighed.

"Is that so? But I still want to spar with you. I also want to test my own abilities. Didn't you say that to Sasuke?" Issui said calmly.

"Oh, there's no other way, Snake-Sheep-Monkey-Boy-Horse-Tiger, Fire Style: Great Fireball Technique!!!" Itachi took the initiative to launch his attack.

"Water Release - Water Curtain!!!" Issui was not to be outdone.

The fireball and the water tent collided, canceling each other out, and disappeared simultaneously.

"Snake-Dragon-Rabbit-Tiger, Fire Style: Dragon Fire Technique!" Itachi unleashed another Fire Style attack.

"Water Release: Water Flow Technique!!!" Issui had no choice but to defend against Itachi's Fire Style attack once again.

This attack shows that although it appears that Issui was not hit by Itachi's Ninjutsu and that Itachi's attack had no effect, it's important to note that Itachi always launched the attack first, followed by Issui's. Both of them have the ability of the Eye of Insight, which allows them to know each other's Hand Seals and techniques. However, Itachi has two advantages: first, Itachi's Hand Seals are faster than Issui's; and second, Itachi is leading Issui by the nose.

Issui can only defend against Itachi's attacks, but if the time goes on, Issui's mentality will waver, and Itachi will take the opportunity to find a favorable moment to knock Issui to the ground.

"Zi-Yin-Xu-Chou-Mao-Yin, Fire Style: Phoenix Flower Jutsu!!!"

"Water Release: Water Severing Wave!!"

In this round, both of them unleashed their Ninjutsu simultaneously. However, Issui's Water Release attacked from behind Itachi, while Issui, facing Itachi's Fire Style, was turned into a burning wooden stake by the Fire Style attack. It actually used a substitution jutsu to block the Fire Style attack, and then appeared behind Itachi to launch Water Release attack.

However, Itachi wouldn't be defeated so easily. His body, which was attacked by Water Release, was turned into several pieces of wood, which turned out to be Substitution Technique.

"Not bad, you discovered the situation I created, disrupted it, and then counterattacked in time. I must say, your combat experience is not bad, but it's just not bad. Snake-Sheep-Monkey-Boy- Fire Style: Great Fireball Technique!" Itachi gradually emerged from the shadow of Issui tree behind him.

"Bang!"

The Issui, attacked by the Fire Style, turned into a wooden stake once again, but this was no ordinary wooden stake; it was covered with a large number of Explosive Tag.

"Boom~"

The immense force of the explosion sent Itachi flying.

"Snap!" This Itachi was a Shadow Clone.

The two figures were no longer on the battlefield, as if they had planned to disappear at the same time. In this exciting battle, neither of them used any powerful Ninjutsu; they fought with only low-level Ninjutsu, including Substitution Technique, Shadow Clone Technique, Explosive Tag, C-rank Fire Style, and Water Release.

Perhaps if this were an ordinary ninja, the battle would already be over. However, for two people with powerful Kekkei Genkai, this is merely the prelude to the real battle.

Issui stood behind a tree, using his third eye to observe the itachi's location from all angles. He discovered two itachi, confirming that one was the real one and the other was a clone.

"Eye of Heaven, Frost— Ice Creation, Ice Serpent."

Issui created a small snake made of ice that slithered rapidly toward an Uchiha Itachi, while Issui remained in place to observe with his Byakugan.

The ice serpent drew closer and closer to Itachi. Once it saw that Itachi was within its attack range, it suddenly unleashed an Ice Shuriken.

"Smack!"

This is Shadow Clone, so the next one must be the real one. However, Issui didn't make a move. Instead, he sent Ice Serpent to the other Itachi's location. He wouldn't act rashly and let Itachi know his true location. It was better to be careful.

"Smack!"

This is another Shadow Clone. Hmm, damn it, it already knows my location. I'm not on the ground...

"Fire Style: Great Flame Flower Technique!!!" Itachi appeared above Issui's head, spewing out three meteor-like fireballs from his mouth. The visual spectacle was extremely dazzling, yet it carried an aura of great danger!

When did another Shadow Clone appear? It then leaped into the air and launched Fire Style attack at Issui. If Issui were hit by this Fire Style attack, he would probably be crippled even if he didn't die.

"Tiger-Dragon-Tiger-Rat-Ox, Eye of Heaven: Flame, Flame Body!" With no other option, Issui could only use the Flame Body Secret Technique. There was no time to dodge this Fire Style attack; this was the only way. Itachi's combat strategy and tactics were far superior to Issui's.

"Boom!"

It struck the ground with the force of a meteorite, causing considerable turbulence and a huge explosion.

Itachi stood on the ground and said, "Come out. Although you were indeed hit by my Fire Style and you didn't dodge, you couldn't have been injured so quickly. If that's the case, you wouldn't be the genius ninja who survived the First and Second Hokage."

Issui body engulfed in flames emerged from the inferno. "Haha, this is truly exciting, Itachi. You're very powerful and violent. Are you trying to kill me so quickly? But you're right, it would be too embarrassing for me to die like this."

Itachi's red Sharingan narrowed. "Oh, a body of flame, so this is your Kekkei Genkai. How surprising. I've heard that the water avatars of the Kirigakure Hozuki Clan are similar. They're somewhat alike. In that case, my Fire Style won't work on you. Only physical attacks, Water Release, and Sharingan Dōjutsu will do."

Issui shook his head. "No, you're wrong about one thing. My flame body is immune to physical attacks. What will you do then?"

Itachi asked in surprise, "Completely immune to physical attacks?"

Issui nodded. "Yes, there wasn't even the slightest bit of damage."

"That's troublesome. My remaining genjutsu won't work on you because your eyes are already closed. You're just using your bloodline limit eyes to see, and they're even more useful than your eyes. So, all that's left are Water Release and Sharingan eye techniques?" Itachi said calmly, as if the existence of these things had no effect on him.

"I've heard that the Uchiha Clan has an even more advanced eye than the Sharingan, the Mangekyō Sharingan. Historically, only Madara Uchiha and his brother Uchiha Izuna are recorded as having Mangekyō Sharingan. I suppose your eyes, genius Uchiha Itachi, have also evolved to this level. I'm really looking forward to it. And the condition for activating the Genjutsu Tsukuyomi you used on Kakashi is that you must have the Mangekyō Sharingan, right?" Issui said with a smile.

"Oh, really? You know about this too, and you're very knowledgeable about it. Even ordinary Uchiha members don't know this. It seems you have a thorough understanding of Uchiha history. Well then, let me show you— the Mangekyō Sharingan — Amaterasu!!!"

Itachi used this highest-level Fire Style. He didn't believe that Issui's flame body could be immune to Amaterasu. This was the flame of the sun, the highest-level incarnation of flame, and there was nothing it couldn't burn.

The black flames adhered directly to the Issui -covered body, but contrary to Itachi's expectations, the black flames fused with the Issui's body!

"Wow, this feels so good! A little more, it's delicious!" Issui's thoughts weren't wrong. The black Amaterasu flames had no effect on his flame body; in fact, they became nourishment. His flame body gradually neutralized the black flames, and some of the black flames were even absorbed into Issui's Eye of Heaven. In the second stage, the Flame Stage, a strange change occurred. Issui's originally red flame body turned into a black flame body. This didn't mean that all of Issui's Fire Style would become black flames, but rather that these black flames would require more Chakra. It didn't mean that Issui could use Amaterasu at will—that would be truly monstrous! He never expected such a good thing to happen during his battle with Itachi.

Itachi exclaimed in horror, "What's going on? You're stealing my Amaterasu flame! How is this possible? This can't be real! Amaterasu is the highest level of flame; no flame is stronger than it. Besides, it burns everything. Your fiery body should have been devoured! What's happening?!"

Issui laughed and said, "I don't know either. I'm just speculating. My Flame Body's Secret Technique is called Flame Body, not Fire Body. This means my Flame Body is made of flames, which is much more advanced than ordinary fire. Moreover, its characteristic is immunity to Fire Style. Your Black Flame Amaterasu is very powerful, but it's still just Fire Style. What happens when two powerful flames meet? They will definitely devour each other. But remember, there's a reason why my Flame Body is called Flame. It has one more word than Fire, which means it possesses extraordinary power. If it can't be immune to your Fire Style Amaterasu, then my Kekkei Genkai Secret Technique is useless. Now I finally understand why it's 100% immune to Fire Style and why it's called Flame Body. It's because it devours all flames. Your Advanced Flame Amaterasu has greatly enhanced my abilities."

Itachi tried his best to calm himself down. His Amaterasu Secret Technique had never failed before, but the flames that could burn everything were actually being devoured today. He had never heard of such a thing before, and there was no record in the clan's secret history of a flame that could restrain Amaterasu.

P. S.: My book about Yunxue will be officially released in two or three days. I hope everyone will support Yunxue, thank you!!! Please add it to your favorites and recommend it!!!

The next chapter is even more exciting: Susanoo VS. Flame Demon Descent!!!