The next day, Training Ground 3
Izuna arrived there at 5:45 a.m. He knew that they would already be there because he had sensed their Chakra in the Training Ground. They were all here since 5:30 a.m. They had been waiting for the past few minutes. Izuna did the hand sign for Kage Bunshin no Jutsu/Shadow Clone Jutsu and three shadow clones of Izuna popped up. They all had equal amounts of Chakra. Izuna said, "We have four weeks to train before Academy starts. I can't train you after the Academy starts. I will practically be in paperwork hell after that. For the first three weeks, you shall be training separately but, for the last week, the four of you shall come at me together to increase your team work. Understand this, I shall not let any of you become genin if you are egotistical and prefer to work all alone."
Naruto and the others accepted Izuna's condition.
Naruto was wearing black robes again with the Uchiha symbol on the back. His hair had its usual spikiness. Mito was wearing bright red clothes with the Uchiha clan symbol on the back. She was much more cheerful than the previous day and her hair was much spikier. Sasuke was wearing a black shirt with the Uchiha clan symbol on the back and white trousers and Naruto was clad orange as usual and had the Uzumaki clan symbol on the back.
Then the real Izuna went to Naruto and the two of them teleported to the Forest of Death or Training Ground 44.
Two shadow clones of Izuna went to Sasuke and Menma and teleported along with them to Training ground Zero.
The remaining shadow clone of Izuna told Mito, "We shall be training right over here."
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Training Ground 44/The Forest of Death
Naruto was surprised at the sudden change of location. He asked, "Where are we Tou-san?"
Izuna grinned and answered, "This is Training Ground 44, also known as The Forest of Death. Right now, we are the only people in here but there are many beasts which can take your life if you are not careful in here. Now you have manifested the Rinnegan. Do you know what it can do?"
Naruto did not know what his father was talking about. He excitedly asked, "What is the Rinnegan?"
Izuna wasn't surprised that Naruto did not know. After all, the Rinnegan was only possessed by three people alive, Izuna, Tajima and now Naruto and many people did not even know what it was. Izuna had not expected Naruto to know the answer and asked him, "What do you see when you see in my eyes?"
Naruto lost his entusiasm at such a question. He answered, "A white eye with six concentric circles and three tomoe in every alternate circle. I suppose it is an enhanced version of the Sharingan."
Izuna smiled and said, "You are not completely of the mark but you are still wrong about my eye being an enhanced version of the Sharingan. Let me ask you another question. Have you seen your own eyes in the mirror since the massacre of the Uchiha?"
Naruto just got let down. He thought he wuld get to learn this rinnegan thing but his father was giving him a lecture. He answered, "No. I neither had time nor any patience to do that."
Izuna sighed and asked, "Are you facing any problems with concentration right now?"
Naruto was surprised. He then felt it was to be expected as Izuna was a genius and had a great sense of the world around him. He answered, "Yes. Ever since the massacre of our clan, I have been receiving too much input from my senses. I haven't been able to concentrate on one thing due to that."
Izuna switched to a tone of a teacher and asked, "Do you know why you are receiving too much input from your senses lately?"
Naruto didn't know why his father was asking him such questions today. He answered, "No. I don't know why I am receiving so much input."
Izuna smiled said, "Well that is because your eyes are the same as mine."
Naruto wasn't expecting that answer. His eyes were the same as his father's. He couldn't even imagine such a thing. He thought that he wouldn't reach his father's level at least for a decade or so but his father was implying that he already had. Then Izuna laughinglly said, "Now, don't jump to any conclusions that you as strong as me or even close to as strong as me. You have a hundred years to go before you are as strong as me."
Naruto was kind of feeling guilty and sad because he had jumped to the conclusion that he could rival his father. Then he said, "Well, tou-san, is this the Rinnegan?"
Izuna was certainly happy that his son had landed on the right conclusion. He said, "Yes, it is the Rinnegan but do you know what it is?"
Naruto slightly regained his enthusiasm and answered, "The best conclusion I can land at is that it is an enhancement of the Sharingan."
Izuna kept his smile on his face and said, "It isn't entirely wrong. After the mangekyou Sharingan comes the Rinnegan. But one with only Uchiha powers such as Mito or Sasuke cannot manifest the Rinnegan. Those with only Senju powers, like Menma can also not manifest the Rinnegan. Only one with both Uchiha and Senju powers can manifest the Rinnegan. The two of us and your grandfather Tajima Uchiha had both Uchiha and Senju powers from birth allowing us to manifest the Rinnegan. The reason why the two of us and my father who are Uchiha have Senju powers is complicated but these Senju powers also allow us to use Mokuton/Wood style. Now, do you know the extent of the powers of the Rinnegan?"
Naruto said in an excited tone, "No. I don't yet know the full prowess of the Rinnegan." He had hoped that this would make his father want to teach him the jutsu which the Rinnegan let you use.
Izuna said pride etched in his voice, "You can sense the chakra of everybody using your Rinnegan. You can also teleport yourself or someone else using the Rinnegan. It increases your strength by a lot and allows you to have better chakra control. You can also absorb someone else's chakra using the Rinnegan. You can absorb Jutsu using the Rinnegan and you can also release the absorbed Jutsu in a stronger manner using the Rinnegan. This also allows you to potentially copy Kekkei Genkai by absorbing them and reusing them."
Naruto was astounded at hearing this. You could potentially copy Kekkei Genkai using the Rinnegan. It was like ninjutsu new year for him and he had gotten a lot of ninjutsu as presents from his father.
Izuna added, "That is not all. You can dissect chakra into smaller pieces and combine Chakra into bigger pieces. You can push and pull anything or anyone using immeasurable force. You can put almost anyone in a genjutsu. You can create huge heavenly objects using the Rinnegan as well. The first person to have manifested the Rinnegan, Hagoromo Otsutsuki also known as Rikudo Sennin/Sage of Six Paths is said to have created the moon using the powers of his Rinnegan."
Naruto's mind was clearly blown by the huge range of powers the Rinnegan. He wanted to skip through the lecture his father was putting him through and wanted to start learning to put the use of Rinnegan. He wanted to be the strongest user of the Rinnegan to have ever lived. Scratch that. He would surely become the strongest user of the Rinnegan!!