There are fanfics where Naruto absorbs the bloodline during a life - threatening battle. When his chakra is at its peak and he's in a near - death situation, his body's natural instinct to survive somehow enables him to absorb the bloodline of his opponent. It's like his chakra reacts to the foreign chakra source and assimilates the bloodline abilities. This often leads to a whole new set of challenges for Naruto as he has to learn to control these new powers quickly. He might face internal conflicts as the new bloodline abilities could have different natures than his own chakra, and he has to find a way to balance them.
In some fanfics, Naruto absorbs the bloodline through a special jutsu. For example, he might find an ancient scroll that contains a jutsu allowing him to transfer and absorb the genetic traits related to a bloodline.
In certain 'Naruto absorb bloodline' fanfics, it can be due to a curse or a prophecy. Maybe there's a prophecy that states Naruto will absorb multiple bloodlines to bring balance to the ninja world. A curse could also be involved, like a curse placed on a particular clan that when they are defeated by Naruto, their bloodline gets absorbed by him. This way of absorbing the bloodline often sets up complex storylines as Naruto has to deal with the consequences of fulfilling a prophecy or being involved in a curse - related event.
In some fanfictions, Naruto might absorb a bloodline through special jutsu or artifacts. For example, he could encounter a mysterious scroll that when he reads it, transfers the power of a bloodline into him. It could also be a result of some sort of experimental procedure gone wrong in the fanfic's alternate universe. Maybe a rogue ninja was trying to create a super - soldier and Naruto ended up being the accidental recipient of the bloodline power.
In some Naruto fanfictions, Naruto might absorb DNA through special jutsu or abilities. For example, he could have a unique kekkei genkai that allows him to take in and assimilate the genetic material of others. This could potentially give him new powers or abilities related to the DNA he absorbs, like if he absorbs the DNA of a Sharingan user, he might gain some form of Sharingan - like abilities.
In some Naruto fanfictions, Naruto might absorb animals through special jutsus or abilities. For example, he could have a unique kekkei genkai that allows him to take in the essence or chakra of animals. It could also be related to some sort of pact or bond he forms with the animals, which then enables him to absorb their powers.
In some fanfictions, it could be through a special jutsu. Maybe Naruto discovers a long - forgotten jutsu that allows him to merge with his dark counterpart. This jutsu might require a great deal of chakra control and concentration.
In some fanfics, it could be through a curse. Maybe an old, forgotten curse targets Naruto and as a result, he gains an eye bloodline. Another way is through some sort of experiment gone wrong. Scientists or rogue ninjas might be experimenting with bloodlines and Naruto accidentally gets affected.
In some fanfictions, Naruto might absorb souls through his chakra. His chakra, which is already a powerful and mysterious energy in the Naruto universe, could have an added property or evolution that enables it to draw in and assimilate souls.
In some fanfictions, Naruto might absorb chakra through unique jutsu. For example, he could have a new, self - created technique that allows him to draw in ambient chakra from nature more efficiently than in the original series. This could be a result of some special training he undergoes in the fan - created story.
Well, there are different ways it can happen in fanfiction. One way could be that Naruto and Mizuki are in a battle, and during the fight, Naruto accidentally activates a latent ability that allows him to absorb Mizuki. Maybe there is some sort of ancient seal on Naruto that reacts to Mizuki's presence and starts the absorption process. Another possibility is that Naruto is exposed to a strange chakra - infused object that was once connected to Mizuki, and this object triggers the absorption.
In some fanfictions, Naruto might absorb Chakra through a special jutsu. For instance, he could use a self - created jutsu that allows him to draw in Chakra from his surroundings or from other characters he's in contact with.
In some fanfictions, Naruto might absorb souls through a special jutsu or power that is unique to that fictional storyline. It could be something he discovers during a dangerous mission or as a result of some strange encounter. For example, he might inherit a power from an ancient ninja clan that allows him to absorb the souls of his enemies, which he then uses to gain strength or knowledge.