𝗗𝗘𝗦𝗖𝗥𝗜𝗣𝗧𝗜𝗢𝗡 | 𝗟𝗢𝗥𝗘

It was invented by two renowned Shinobi known as 𝗔𝘅𝗲𝗹 and 𝗧𝘀𝘂𝗵𝗶𝗸𝗶 𝗧𝗮𝘆𝗼𝗸𝗮𝗺𝗶 , They was inspired by witnessing the Tailed Beast Ball during there various clashes with other Jinchūriki. In their battles, they analysed how the ninjutsu worked and believed that he could recreate that process with there own chakra. It took them both  three years of experimenting with chakra manipulation to create the Rasengan technique.

Usually one would develop a ninjutsu by imagining the desired result, developing theories on what kind of chakra transformation it would require and then experimenting with the possible hand-seal combination to achieve that result. But because the entire ninjutsu was based on something created by a Tailed Beast who never used hand-seals and were innately capable of compressing their chakra, he decided it would be best to copy it as accurately with pure chakra control.

For that purpose, he broke the entire process down into three stages achieved through three lessons. The first stage is to release chakra from the hand and make it spin widly, the second stage is to increase the power being used to its limit and the third is to compress the greatest force of the rotation.

The first lesson is to burst a water balloon with chakra by causing the water to spin wildly in multiple directions. The more directions it spins and the greater the speed then the greater the rotation. The second lesson is to burst a rubber ball by increasing the force of the chakra to its maximum. This places a great burden on the chakra pathways of the body due to the high level of chakra focused in one region. And the third lesson is to compress the greatest force of the rotation to maintain a stable sphere.

ᴋᴀɪᴛᴇɴsʜɪʀᴇɪ (ʀᴏᴛᴀᴛɪᴏɴ ᴄᴏɴᴛʀᴏʟ)

ʀᴀɴᴋ

C

sᴋɪʟʟ

Ninjutsu/Supplementary

ᴇғғᴇᴄᴛ

The first step was learning how to burst a water balloon by spinning the water inside in multiple directions at once using only the 's chakra, which emphasizes rotation.

ᴛᴀsᴋ

By filling up water balloons the must somehow to be able to control their chakra in a specific order by forcing the chakra to spin in every direction making the balloon pop. (10 Post)

ᴛsᴜʏᴏsᴀsʜɪʀᴇɪ (ᴘᴏᴡᴇʀ ᴄᴏɴᴛʀᴏʟ)

ʀᴀɴᴋ

C

sᴋɪʟʟ

Ninjutsu/Supplementary

ᴇғғᴇᴄᴛ

The second step was for the to burst a rubber ball, and since rubber is thicker and air is completely different from water, it forces the to use denser chakra to break it. This step emphasizes power.

ᴛᴀsᴋ

By using the concept of the first training regiment the must use more of their power to suddenly make the power of the chakra in a hurricane manner with such a force in where it quickly destroys a rubber ball. (10 Post)

ᴀɴᴛᴇɪsʜɪʀᴇɪ (sᴛᴀʙɪʟɪᴛʏ ᴄᴏɴᴛʀᴏʟ)

ʀᴀɴᴋ

C

sᴋɪʟʟ

Ninjutsu/Supplementary

ᴇғғᴇᴄᴛ

The third and final step was to combine both step one and two by spinning chakra inside a balloon without moving the balloon itself, emphasizing stability of the sphere shape.

ᴛᴀsᴋ

The must be able to control one hundred percent of the chakra when it is rolling in one's hand. They must keep it constant in which you have to keep it one hundred percent at all times or else the power will dissipate and the will not feel the full effect. The still needs to apply all of this however into the Rasengan 螺旋丸 (Spiraling Sphere) to make it complete. (10 Post)

𝗥𝗔𝗦𝗘𝗡𝗚𝗔𝗡 𝗜𝗦 𝗕𝗢𝗥𝗡

The Rasengan (Spiralling Sphere) is an A-rank ninjutsu and one with the highest possible level of shape transformation.It releases chakra from the palm of the ninja’s hand which spins wildly in all directions at once and is compressed into the shape of a sphere. The chakra swirls like a typhoon but stably maintains its rotation and power, creating the equivalent of a hurricane in one’s hand.

Once the ninja strikes their enemy, the compressed force of the rotation is released and its destructive power is amplified. It grinds into the target’s body and releases a spiralling shockwave of force into and beyond them to sweep away everything in its path and overturn the earth as it blasts them back.

The amount of force the Rasengan can unleash depends on the number and speed of the chakra’s rotation, the amount of chakra it contains and how stable the compression is. The more it spins, the faster it spins and the more chakra released then the greater it becomes in size and power. The less chakra the possesses and/or the less control they have then the smaller and weaker their Rasengan would be.

The exact effect that the Rasengan has on its target can be controlled by the caster to a degree. It can expend all of its energies into grinding away at the target instead of exploding, or the rotation can be weakened to avoid internal damage and only throw them back with the force of the explosion. The effects also vary between human and non-human targets as the former receive lethal internal damage but remain intact while the latter is usually blown apart as they are able unable to withstand it.

The Rasengan is a spinning ball of chakra formed and held in the palm of the 's hand, inspired by the Tailed Beast Ball and intended to be the highest form of shape transformation in Ninjutsu. Unlike most jutsu, the Rasengan does not require hand seals to perform. Once it is formed, it also does not require any additional chakra to sustain it, which means that there is no definite limit to how long the Rasengan can be used. Though the Rasengan's shape is consistent from to , its size varies from only barely large enough to be noticeable to much larger than the 's hand. With greater experience with the Rasengan comes a larger size.

On , the Rasengan grinds into its target, propels them along the Rasengan's trajectory - either away from the or into the ground beneath them - and at some point bursts, causing severe damage at the point of . Due to the level of chakra control required to manifest the Rasengan, it requires a reasonable amount of coordination from those that attempt to learn it, and even more to utilize it without a conduit (like shadow clones). Once formed, Rasengan lasts up to 3 posts without sustenance before dispersing on its own.

𝗔𝗗𝗗𝗜𝗡𝗚 𝗡𝗔𝗧𝗨𝗥𝗘 𝗧𝗥𝗔𝗡𝗦𝗙𝗢𝗥𝗠𝗔𝗧𝗜𝗢𝗡

The Rasengan itself was only ever half finished. From the very beginning, 𝗔𝘅𝗲𝗹 𝗨𝘇𝘂𝗺𝗮𝗸𝗶 and 𝗧𝘀𝘂𝗵𝗶𝗸𝗶 𝗧𝗮𝘆𝗼𝗸𝗮𝗺𝗶 had intended to combine the ninjutsu with nature transformation. By adding nature transformation to the pinnacle of shape transformation, he meant to create one of the most advanced and powerful ninjutsu possible. But adding nature transformation to the Rasengan is a feat which requires a level of focus and control that would take years of devoted effort to achieve even after mastering nature transformation and the Rasengan itself.

The difficulty of trying to apply nature transformation to the already advanced chakra manipulation of the Rasengan typically causes a violent rejection between them. But when the Rasengan successfully begins that transformation, its shape starts to change to reflect the element and its power immediately sures the original ninjutsu. However this is no different than an incomplete Rasengan which holds only a fraction of its true potential. The further the transformation is taken then the more powerful its effect until it is reaches completion and the ninjutsu fully realizes that potential.

𝗪𝗜𝗡𝗗 𝗥𝗘𝗟𝗘𝗔𝗦𝗘

Combining the Rasengan with wind natured chakra creates a swirling orb of chakra surrounded by four blades of wind like a shuriken. When unleashed on the target, it releases countless wind blades to tear apart their body and pulverizes everything else caught in its range of effect. The surrounding wind blades are able to cut through any obstacles and the ninjutsu can be made to explode even without hitting anything.

𝗟𝗜𝗚𝗛𝗧𝗡𝗜𝗡𝗚 𝗥𝗘𝗟𝗘𝗔𝗦𝗘

Combining the Rasengan with lightning natured chakra creates a compressed mass of electricity. When it strikes the target, it unleashes a huge electrical discharge which burns out their entire nervous system until they are unable to function. At the same time it releases a storm of lightning that paralyzes anyone caught in its reach.

𝗙𝗜𝗥𝗘 𝗥𝗘𝗟𝗘𝗔𝗦𝗘

Combining the Rasengan with fire natured chakra creates a swirling orb of burning chakra. It burns the target’s body until they are nothing more than charred flesh and ash while scorching their surroundings in a firestorm.

𝗘𝗔𝗥𝗧𝗛 𝗥𝗘𝗟𝗘𝗔𝗦𝗘

Combining the Rasengan with earth natured chakra creates a solid mass of rock hard chakra. It petrifies the target’s body and shakes like an earthquake, shattering their body into dust and tearing apart the surrounding land.

𝗪𝗔𝗧𝗘𝗥 𝗥𝗘𝗟𝗘𝗔𝗦𝗘

Combining the Rasengan with water natured chakra creates an orb on compressed, swirling water currents. It explodes out in a destructive tide that sweeps everything away under a crushing lake.