Goddess of Ice; Reborn as Naruto's twin sister

After Itachi finished his delusion, the fight started properly as Sasuke and Itachi began throwing ridiculous amounts of shuriken at each other. The shuriken bounced off of each other, resulting in a complex web of obscure trajectories, but due to both of them having a fully developed Sharingan while inheriting their clan's talent in shuriken jutsu, their contest ended in a draw.

"Although they are simply showing off right now, at least there is something to watch now, unlike the previous genjutsu stare off."

[I didn't come here to watch two crazies throwing metal at each other, I want to see fire, lightning, and big explosions.]

'Geez, be patient, Kurama; stuff like that needs a proper build-up. Instantly unpacking the big moves is just bad manners.'

[If you say so.]

A short moment later, the clash was over, and the duo started weaving hand signs, resulting in both of them shooting a massive fireball at each other. The two fireballs collided in mid-air, significantly increasing the temperature in the surroundings.

A frown appeared on Yuna's face when the heatwave washed over her, and with a swipe of her hand, two additional ice cubes dropped into the glass filled with colorful liquid she was currently holding.

*Sip*

'Much better.'

[Is that poison?]

'Err...define poison.'

[A liquid toxic enough that if an average human were to drink it, they would either suffer heavily or die.]

'Oh, in that case, yup, this is poison.'

[*Sigh*]

The clash ended with Sasuke's fireball overpowering Itachi's, forcing him to dodge-roll out of the way while giving Sasuke the chance to take out a huge shuriken to throw at Itachi.

[No! Don't go back to shuriken!]

Itachi took out a kunai, blocking the shuriken just as it was about to cleave into him, but Sasuke had already predicted that move and started infusing lightning chakra into the shuriken through a wire he previously attached to it, significantly sharpening it, resulting in Itachi getting cut in two.

However, crows started flying out of the two severed halves instead of blood, revealing that the bisected Itachi was just a clone.

[Really? A crow clone? That's some weird-ass shit.]

'Well, Orochimaru had his snakes, and Itachi has his crows. That's just their style.'

Apparently, the real Itachi evaded Sasuke's attack by jumping on the roof of the building and was swiftly followed by Sasuke, who did the same.

Yet again, the duo started weaving hand signs, and yet again, two fireballs clashed in mid-air. Although Itachi's was overpowered again, he didn't dodge this time and instead closed his right eye for a brief moment.

When he reopened his eye, the pattern of his Sharingan was changed, and in the next instant, Saskuke's fireball was engulfed by black flames.

[Ohh! Amaterasu wasn't it. The black flames that burn even other flames. Things are finally getting a little flashy.]

Yuna nodded her head while dropping another ice cube in her drink.

'Hot and steamy.'

As soon as Sasuke saw the black flames, he started running in an attempt to prevent Itachi from focusing his eyes gaze on him, which would result in him bursting in flames.

While running, Sasuke activated his curse seal to increase his speed. Although he managed to flee from Itachi's attack for a short while, causing the surrounding forest to be covered with black flames, Itachi finally managed to catch Sasuke, resulting in one of his succubus wings bursting into flames.

Due to having the Amaterasu activated for such a long time, blood was flowing out of Itachi's right eye, which nicely pooled into the blood that was already coming out of his nose due to a different reason. Jiggle physics and stuff like that.

Usually, getting caught by Ametarsu like Sasuke just did would be a death sentence, but Sasuke learned under Orochimaru for almost three years, so he naturally had some weird tricks up his sleeve.

His front burst opened, and another Sasuke exited it, like a snake shedding its skin. Although this technique costs a lot of chakra, it was still preferable to getting burned to death.

'Buh! If you use Orochimaru's self-birthing technique, you should at least do it all the way and birth yourself out of your own mouth!'

[How impudent!]

Sasuke started shooting more fireballs, forcing Itachi to dodge all of them frantically. However, since Itachi still stood on the roof, while Sasuke landed on the floor after his self birth, all the fireballs vanished into the sky. This, combined with all the fire jutsu that have already been used and the burning forest in the surrounding, caused rain clouds to form, and moments later, it started raining.

A small roof out of ice formed above Yuna, shielding her from the rain.

'As I said, hot and steamy.'

[Indeed, and it seems like it's finally time to take out the big guns.]

'Yup. Sasuke's power will crash into Itachi with a violent trust and cover his whole body.'

[Sure, let's go with that,]

Lightning chakra started covering Sasuke's hand, and moments later, he heavily swiped it down, resulting in a gigantic lightning dragon descending from the sky, engulfing Itachi's whole body, while resulting in a deafening explosion.

[Ohh, nice and flashy.]

'Not bad, not bad.'

However, despite the brutal attack, Itachi was unhurt as a massive skeletal structure covered his body.

'What did Hisoka call that again? Susan? Pretty weird name for a technique, but who am I to judge?'

[Pretty sure it wasn't Susan, but whatever, I couldn't care less.]

Itachi started walking towards Sasuke with small shaky steps while still being covered by the skeletal structure.

Naturally, Sasuke tried resisting, but no matter what he tried, he couldn't pierce through Itachi's defense, and moments later, he was pressed against a wall with fear clearly visible in his eyes.

Itachi lifted his hand, making it look like he was about to pluck out Sasuke's eye, but instead of doing so, a kind smile appeared on his face as he tapped his finger against Sasuke's forehead.

Itachi could feel the last vestiges of his life force leave his body, and he was about to fall over when he remembered the appearance of Sasuke's second stage curse seal and that Yuna was responsible for it.

His life force reignited for a brief moment, and he threw a meaningful gaze towards Yuna's location.

Yuna noticed Itachi's gaze, shrugged her shoulders, and then gave him a thumbs-up, which resulted in another meaningful nod from Itachi before his life finally ran out, and he collapsed.

'I'm honestly surprised that he found me. I consider myself to be pretty good at stealth and wasn't expecting him to find me.'

[One more down~ Two to go~ Soon, soon, soon they will all be gone~]

'Mhh~ must be the Dao of sis-con. Oh well, not that it really matters.'

[Two to go~ Two to go~]

'Oh well, time to manipulate a psychologically damaged young man who just killed the person he loved the most. This will be fun~'