Memoirs of an Isekai in Naruto

Explanation:

Ok kids I based this Jutsu off a Slight AU version of Naruto where the main character had an extreme Wind and high lightning nature and natural energy affinity. The title was something like Naruto: The Wind Calamity or something similar. The author was looking at what could come after Senjutsu. 

After reviewing what his character learned I concluded that his character was a civilian-born ninja with limited chakra reserves and that the greatest issue the MC faced in becoming powerful that he could also use Senjutsu to solve was his body. 

Let's back up a bit. I might have lost you. No, I am not crazy and before you scoffed at my theory just remember as I have never felt chakra I could never test my theories.

Firstly after covering everything in the first log, it should be obvious one is limited by their body and their physical energy as it is the only energy that can't keep growing throughout a ninja's life. So how does one surpass this issue? By improving Senjutsu! Let's first reflect on what Senjutsu is. Balancing the power of nature, spiritual and physical energy in the body. 

Reviewing this definition we can reflect what the limiting factor is the body! To surpass Senjutsu we must surpass the body! The first step comes from the hydrification technique from the Hoozuki clan changing one physical body to a chakra nature body immune to physical matter and capable of physical immortality. This technique is based on the tailed beast body having a physical chakra form and will likely need to be mastered to understand how to create a chakra body capable of still producing physical energy, unlike a shadow clone.

The next step is how to sustain this physical immortality and how does this improve senjutsu? To surpass Senjutsu without introducing a new energy you can't go up in complexity but go up in control. First, what can we do that would be an improvement of control, what does one get out of and what can we use as a real-world example?

Ok, this might be hard to believe but the Sage of Six Paths exists and he is not a ramen chef no matter how many times I have probed Teuchi. The sage had a technique called the Creation of all Things which he used to turn his imagination into reality and was most famously used to create the tailed beast. This nugget of information is the reason we are focusing on studying Izanagi which Danzo obtains in a few years after removing Shizuoka Uchiha for no reason other than fear even if they were allies. This is another example for not trusting that slimy bastard or any of the elders like the third Hokage who backs his ass.

Spiritual energy manipulation The pinnacle of this is Izanagi. It is explained that this skill uses spiritual energy which is the basis of yin release to create shape from nothingness. 

Physical energy manipulation. The pinnacle of this is also Izanagi. Through the use of Yang release one uses that breath life into that shape.

Nature energy manipulation. The pinnacle of this is not Senjutsu but the ten tails are made of natural chakra even Kurama said that Ten-Tails can not be sensed by any traditional means and can only be sensed the same as the natural energy that circulates the planet. Naruto notes that Ten-Tails is like nature itself, and Saske confirms that natural energy can only be defeated by natural energy.

Knowing that the tailed beasts are parts of the ten tails it can be surmised that they are part of nature energy. Given that, every tailed beast can revive from death and are the only ones that are known to be able to as well as they are the only creatures that are chakra-based organisms one can correlate that if one can turn themselves into a natural-based organism they can become immortal.

Just because the tailed beasts are natural energy-based beings doesn't mean they don't have the physical and spiritual energy to make chakra which is proven with the Jinchuuriki those chakra is increased via leakage of chakra through the seals and on their bodies. 

If we are not looking at the Jinchuuriki but just the beasts themselves we can also see that they have thoughts and can communicate meaning that they have a spirit and that their bodies interact with the world physically even if they are energy meaning yang energy is interacting with the world. We even can tell that their energy-based body have an affinity to specific chakra natures for example Shukaku - Wind, Matatabi - Fire, Isobu - Water, Son Goku - Lava (Earth and Fire)

Yeah, kids shit about getting circumspect from here but shit is about to go crazy if you can pull this off. Through the use of elementalisation, yin, yang, and natural energy one creates oneself into a tailed beast chakra aggregate base, and through the use of that energy to manipulation seen in Izanagi you can bring form and life to the empties. This body through the principles of the Hydrification creates an energy-based being with the power to control their physical form at will and produce yang energy. It is advised you collect energy from a tailed beast whose nature affinity closetest matches yours as a basis for how to mix ones chakra.

As I can't test if one can use their nature-shifted chakra body to cast Jutsu, I think you will likely also need to get ahold of the forbidden Jutsu the edo tensei. This Jutsu relies on the sacrifice of a vessel of physical energy or Yang energy needed to bring life to the person's spiritual energy. 

From what I can tell this is what limits the strength of the revived likely duration. So you will cast on yourself using yourself as the sacrifice. Instead of letting that Jutsu revive you, you will control the Yang energy that is used to create your body and combine it with your spiritual energy in the ratios of a tailed beast creating a chakra-based form capable of producing its physical energy. 

This is why it is important to use a compatible-tailed beast as a base as you will have to change your Yang-aspected physical body into the Yang aspected energy based tailed beast and being of a different nature affinity could end in disaster if you failed to create a body capable of producing physical energy.

The consequence of this transformation is that one is given near physically immortal with a defeat condition of sealing or running out of physical energy which is used to create the Yang need to recreate your body which like the tailed beast will kill them only to revive with the natural energy and physical energy later. 

Ok, those are the upsides but what are the downsides? Have you ever seen a tailed beast use Jutsu? It might just be that do not need it due to their power and all they need is nature and shape manipulation the chances are possible that you will no longer be able to mold the chakra internally the same way for Justus as you will no longer have a human body. It is important to learn high levels of Yin and Yang energy. It is important to work on these skills to make one's body but it is doubly important to master these energies till the point you remove all need for seals as you might need to manipulate your chakra outside of your body as in doing so internally you might feed yourself  to the attack. 

Another downside is you will likely be weaker for a LONG time after this Jutsu unless you do this in the prime of your life. The spiritual energy to create your the size of the body and thus the about of body capable of creating Yang energy is your limiting factor as a young 40-year-old man compared 1000-year-old tailed beast which has been constantly growing one energy through life experience. 

Training: 

Step one: one needs to learn this Technique with their shadow clone. When creating your shadow clone you make a chakra-based body. Learn to change the Shape of the clone. This is not about henging the clone but using the yin to create the clone to change the shape of the body like Naruto's ultimate skill sexy Jutsu. If he hasn't made this skill yet I have to congratulate you on your rate of growth but my description is good enough.

Step two: Using tailed beast chakra. At this point in this Technique's training, one needs a compatible tailed beast chakra. You now use Senjutsu to create a clone with spiritual and physical energy, natural energy, and nature changes based on the principles of Hydrafication to match the stable chakra body of the tailed beast and attempt to create a shadow clone capable of producing physical energy. 

Step three: Now is the dangerous and final step you need to Edo Tensei yourself. Then you will need to manipulate all of your own spiritual and physical energy as well as natural energy to rebirth your new body.

Footnote: 

So yeah kids this might drop your strength for some time but as a now immortal being you will have more than enough time to strengthen yourself. I suggest if you choose Shukaku as your beast you should be able to get some chakra from him at the end of Naruto's chunin exams.

I also suggest you master increasing the air pressure around others in combat with yin and Yang nature manipulation.

It might be hard to pull off but it would be a strong means of sealing an opponent in a fight and finishing. Then when you decide to release the pressure just look at what happens to deep sea or saturation divers when depressurized. Do they exist in this world? Well, what brought this idea to me was when I remembered an event called the Byford Dolphin incident. They either fall over dead due to boiling their whole body or an instant of explosion depending on how that pressure was released.

You guys can also write ideas for jutsus here at the bottom so you don't forget the inspiration and who knows you might see I already thought of those in future logs.