Masked Obito.
This was Obito during the future Nine-Tails Incident. He would have been difficult to deal with if Minato hadn't possessed the Flying Thunder God Technique and crushed Obito with his battle IQ.
Konoha, a great village, couldn't find a way to deal with Obito.
Dual Mangekyo Sharingan Kakashi is Kakashi in his temporary state during the final battle against Kaguya, after Obito gave him a power-up. At that time, Kakashi received Obito's complete power, allowing him to use Kamui with Dual Mangekyo Sharingan.
Moreover, Kakashi at this stage received some residual Ten-Tails Chakra from Obito's body, which allowed him to use Perfect Susanoo. This is something that ordinary Mangekyo Sharingan users, even if they pushed themselves to the point of collapse, could not achieve. Yet, Kakashi with Dual Mangekyo Sharingan managed to use it.
If defeating Kakashi dropped a portion of the Ten-Tails Chakra, it would be great. Of course, Obito's Kamui is also excellent.
Minato in his Edo Tensei state was equally powerful. This was Minato who could perfectly use the power of the Yin Kurama and enter Kurama Chakra Mode.
If it were just Minato in his normal state, he would at most be considered a tricky Kage-level expert. He could still be targeted when necessary. But Minato in Kurama Chakra Mode is one of the few top powerhouses in the Ninja World.
Of course, Kazuki was more interested in the Kurama within Minato's body.
As for Yugito Nii, the only thing that could interest him was the Two-Tails within her body.
As for Sakura, Kazuki ignored her. At this time, Sakura's self-proclaimed ability to catch up to Sasuke and Naruto was simply the strongest genjutsu. The most crucial part was that Kaguya was actually punched by Sakura in the end.
This is simply unscientific!
Sakura was upscaled too much.
With a thought, Kazuki entered the combat arena, first choosing Sakura. Then, he instantly appeared in front of Sakura, exchanged a few heartfelt words with her, and instantly took her life.
[Ding, congratulations for defeating Sakura and obtaining Sakura's Medical Ninjutsu. Do you wish to merge?]
I admit you have some use, you useless woman.
You can say Sakura is weak, you can say she's a burden when things go wrong, and she ruins her reputation by chasing Sasuke when nothing's happening, but you cannot deny that her Medical Ninjutsu is excellent.
Even Sasori's poison, Sakura could still decipher.
As Tsunade's disciple, Sakura can be considered a qualified successor. Whether it's her monstrous strength or Medical Ninjutsu, she performed better than Shizune.
In terms of Medical Ninjutsu, Sakura at this stage was the number one person below Tsunade.
My goodness, if you think about it carefully, isn't Sakura's talent a bit too excessive?
She doesn't have the talent or the cheats of Sasuke and Naruto. In terms of learning theoretical knowledge, she is terrifyingly great.
After merging Sakura's Medical Ninjutsu, Kazuki's eyes flickered. He had been thinking about how to help Mikoto and Kushina get stronger. With this knowledge, Kazuki saved himself many years of effort.
Afterward, he turned his attention to Yugito Nii. As a perfect Jinchuriki, Yugito's strength was quite good. When the Akatsuki hunted Jinchuriki, Yugito wasn't defeated due to insufficient strength.
She was ambushed by the immortal duo. Before understanding the specific intelligence of those two, let alone Yugito, even Hashirama would likely encounter danger.
With all that said, upon entering the battle, Kazuki instantly defeated her. A six tomoe rinnegan makes it too simple to deal with ordinary ninjas.
[Ding, congratulations for defeating Yugito Nii and obtaining pure Two-Tails Chakra. Do you wish to merge?]
Finally, Tailed Beast Chakra appeared. This is what Kazuki currently needs most. As long as he gathers the Tailed Beast Chakra, his strength will continue to increase.
Kazuki's had no plans of reviving Ten-Tails, as that Ten-Tails belongs to Kaguya, and no one can guarantee whether Kaguya and Hagoromo had left behind any hidden traps on it.
Madara was tricked by the Ten-Tails. Otherwise, even if Black Zetsu betrayed him, he wouldn't be able to restrain Madara.
And Kaguya was later tricked by Hagoromo. Hagoromo divided the Ten-Tails into Nine Tailed Beasts, and each Tailed Beast had its own consciousness.
In the later stages of the battle, the Chakra of the Nine Tailed Beasts within Naruto resonated with Kaguya's Ten-Tails Chakra, causing her Chakra to fall into a chaotic state and preventing her from fully utilizing her power.
Kazuki didn't want to be ambushed by them. The Tailed Beast Chakra absorbed through the combat arena was the purest kind. Kazuki didn't need to worry about being controlled by them. Moreover, once this Chakra was merged, it would become his own power.
In other words, he would not only become a member of the Ōtsutsuki clan but also become another Ten-Tails.
As the Two-Tails Chakra merged, his bloodline once again boiled. This boiling was even more significant than before. Although the amount of Chakra didn't increase much, he could clearly feel that the quality of his Chakra had subtly improved a little.
Indeed, his guess was correct. Perhaps after completely merging the Chakra of the Nine Tailed Beasts, he would completely master the power of Kekkei Mora, just like Kaguya, and not become a Ten-Tails Jinchuriki.
Moreover, not the flawed Kaguya from a thousand years later, but her strongest state.
Having absorbed the Two-Tails Chakra, Kazuki quickly turned his gaze towards Minato in his Edo Tensei state. He needed that Nine-Tails.
No sooner said than done, Kazuki once again entered the combat arena.