THEORY: Tobirama originally used Edo Tensei to resurrect his brother Hashirama
I believe that Tobirama never “originally” created Edo Tensei to sacrifice a living shinobi... he created it to revive his brother, Hashirama. It may have been used afterwards with living sacrifices… but… I REPEAT, IT WAS NEVER ORIGINALLY CREATED AS A KINJUTSU THAT USES HUMAN SACRIFICES.
According to the manga, Edo Tensei is a variation of the summoning jutsu. Summoning jutsu is a Space/Time ninjutsu, and Tobirama was known to master Space/Time jutsus. Normally a summoning jutsu is only used to summon a physical “body” across large distances of “space”. My theory is that Edo-Tensei never truly needed a “living” sacrifice... but it needed a LARGE SOURCE OF LIFE ITSELF to summon something as great as a spirit across the void of life and death. Normally summoning jutsus are done with the blood of the user, and blood is a source of life. But an S-Ranked summoning jutsu such as Edo Tensei could only be done using someone of Hashirama's life force (without having to use the “life” of a living sacrifice). It is the most powerful summoning jutsu in the shinobi world, so it would obviously need a extreme amount of life force, more than just blood alone, such as a living sacrifice.
FALSE ASSUMPTION: Edo Tensei was “created” initally using Human Sacrifices
“Supposedly”, Edo Tensei requires a human sacrifice to bring a soul back to life from the realm of the dead. But let’s analyze this “fact”. First of All, it is stated in the manga that Edo Tensei is just a variant of Kuchiyose no Jutsu (your regular summoning justu). See below:
In the Manga, Kabuto says that Edo Tensei is a variant of Kuchiyose no Jutsu (your regular summoning justu). Kuchiyose no Jutsu is a space–time ninjutsu that allows the summoner to transport animals or people across long distances instantly. Also, in real-life Japan, the term kuchiyose (Literally meaning "drawing in to speak") refers to the practice of allowing spirits — like those of the dead or kami — to possess one's body and speak through it. So instead of summoning a creature, a person or an object, a soul [spirit] is summoned from the pure world (Joudo) to the impure world (Edo) and the soul is placed (possesses) a living person. Edo Tensei is in fact a summoning jutsu. All summoning jutsus are Space-time ninjutsu. Tobirama was an expert in space-time ninjustsu. Which illustrates how he had the skills and ability to come up with the technique Edo Tensei.
Since we know that Tobirama is a master of Space-time jutsus, it is easier to see how he may have had the knowledge to be able to modify Kuchiyose no Jutsu to summon a spirit (back from the dead) instead of summoning a regular physical entity (from one location to another). And as stated above in the theory section, Hashirama's DNA should have enough life force to perform this type of summon that currently needs a “living sacrifice's” amount of life force to execute.
SAGE'S BODY: Hashirama has the perfect “body” for Edo Tensei
Let me start by reminding the readers that Life force (normally blood) is needed in order to perform any summoning jutsu. Edo Tensei is nothing more than a complex summoning jutsu. Hashirama was said to be the only Senju shinobi known to be born with the power of creating LIFE (Wood Release). This is evident decades later of how powerful and full of life his DNA currently holds in the earth (Danzo, Yamato, Tobi, Gedo Mezo, Edo Madara, etc). This proves that the DNA in the body of a “dead” Hashirama could have had enough life force for Tobirama to complete this S-Ranked summoning jutsu WITHOUT A LIVING SACRIFICE. It other words, Hashirama's DNA is so imbued with life, that the blood/body of a dead Hashirama could’ve still had enough life force to complete a “soul” summons (Edo Tensei).
MY ASSUMPTION: Hashirama was resurrected in order to avenge his own death.
I want you to think about something for a moment…
…Hashirama was obviously killed by a “worthy adversary”… and the shinobi powerful enough to kill Hashirama would instantly be a threat to the entire shinobi world. The threat of whatever evil shinobi powerful enough to kill Hashirama... is reason enough to believe Tobirama needed to temporarily bring his brother back to life. Who else would be able to defeat a shinobi POWERFUL ENOUGH TO KILL HASHIRAMA… but Hashirama himself...?
(Please Note: This portion (below) of the theory can be ignored, it is not vital to the main point of this thread.)
My assumption is that Tobirama used Edo Tensei to resurrect Hashirama after Madara or “Tobi” killed him. Yes, I am speculating that Madara (or Tobi) killed Hashirama, not another shinobi. I say this b/c obviously there is NO SHINOBI alive that can “currently” kill Madara, but history has shown us that Hashirama beat Madara more than once. So I cannot possibly believe that any shinobi was able to kill Hashirama except Madara himself! And coincidentally, I believe no shinobi would have been able to kill Madara except Hashirama himself!
TIMELINE SUMMARY (THEORY):
1) Hashirama “kills” Madara (or thinks he did) at the Valley of the End
2) Madara obtains Rinnegan or some other jutsu (Like Perfect Susano'o)
3) Madara fights Hashirama a second time (possibly with assistance of Tobi) with a NEW power... and “kills” him
4) Tobirama creates/performs Edo Tensei (a S-Ranked Space-time summoning jutsu) to temporarily revive Hashirama's soul back to his original body (a dead body which DNA is still embued with overwhelming life force)
5) Edo Hashirama kills Madara (for the 2nd time) and “dies” himself once his soul is at rest (Edo Tensei is released and Hashirama goes to the Pure World without a troubled soul)
Special Note: All souls DO NOT go to the Pure World after they die... if they have a troubled spirit. The White Fang is a great example of this, he committed suicide and his soul was not at peace at his death—so he remained in a state of “limbo” until he was finally able to speak to Kakashi. If Hashirama were killed by Madara as he claims, and Madara was still alive... Hashirama would have had a troubled spirit from losing to him. I could see an Edo Hashirama being released from Edo Tensei after he killed Madara (again) and put his soul at ease (same as Edo Sasori, Sai's brother, etc)
Side Note: This theory would also explain why Madara knows how to Release Edo Tensei, b/c he fought an Edo Tensei Hashirama. No one else is known to have used this jutsu except Orochimaru and Kabuto, and Madara did not know who Kabuto or Orochimaru was. But Madara could have easily witnessed Tobirama perform this jutsu reviving his own brother Hashirama. If this isn't the case, Madara must have watched Tobirama use human sacrifices to do Edo Tensei and I do not agree with that theory.
TL;DR
Tobimara created Edo Tensei w/o the need to kill off living people but Orochimaru added that feature on, Tobimaru being a S/T user was the fact that the could transport souls back to the impure realm.
A friend showed me his interesting ideas on the matter, so what do ya think? Sorry if repost, he likes to steal theorys
I believe that Tobirama never “originally” created Edo Tensei to sacrifice a living shinobi... he created it to revive his brother, Hashirama. It may have been used afterwards with living sacrifices… but… I REPEAT, IT WAS NEVER ORIGINALLY CREATED AS A KINJUTSU THAT USES HUMAN SACRIFICES.
According to the manga, Edo Tensei is a variation of the summoning jutsu. Summoning jutsu is a Space/Time ninjutsu, and Tobirama was known to master Space/Time jutsus. Normally a summoning jutsu is only used to summon a physical “body” across large distances of “space”. My theory is that Edo-Tensei never truly needed a “living” sacrifice... but it needed a LARGE SOURCE OF LIFE ITSELF to summon something as great as a spirit across the void of life and death. Normally summoning jutsus are done with the blood of the user, and blood is a source of life. But an S-Ranked summoning jutsu such as Edo Tensei could only be done using someone of Hashirama's life force (without having to use the “life” of a living sacrifice). It is the most powerful summoning jutsu in the shinobi world, so it would obviously need a extreme amount of life force, more than just blood alone, such as a living sacrifice.
FALSE ASSUMPTION: Edo Tensei was “created” initally using Human Sacrifices
“Supposedly”, Edo Tensei requires a human sacrifice to bring a soul back to life from the realm of the dead. But let’s analyze this “fact”. First of All, it is stated in the manga that Edo Tensei is just a variant of Kuchiyose no Jutsu (your regular summoning justu). See below:
In the Manga, Kabuto says that Edo Tensei is a variant of Kuchiyose no Jutsu (your regular summoning justu). Kuchiyose no Jutsu is a space–time ninjutsu that allows the summoner to transport animals or people across long distances instantly. Also, in real-life Japan, the term kuchiyose (Literally meaning "drawing in to speak") refers to the practice of allowing spirits — like those of the dead or kami — to possess one's body and speak through it. So instead of summoning a creature, a person or an object, a soul [spirit] is summoned from the pure world (Joudo) to the impure world (Edo) and the soul is placed (possesses) a living person. Edo Tensei is in fact a summoning jutsu. All summoning jutsus are Space-time ninjutsu. Tobirama was an expert in space-time ninjustsu. Which illustrates how he had the skills and ability to come up with the technique Edo Tensei.
Since we know that Tobirama is a master of Space-time jutsus, it is easier to see how he may have had the knowledge to be able to modify Kuchiyose no Jutsu to summon a spirit (back from the dead) instead of summoning a regular physical entity (from one location to another). And as stated above in the theory section, Hashirama's DNA should have enough life force to perform this type of summon that currently needs a “living sacrifice's” amount of life force to execute.
SAGE'S BODY: Hashirama has the perfect “body” for Edo Tensei
Let me start by reminding the readers that Life force (normally blood) is needed in order to perform any summoning jutsu. Edo Tensei is nothing more than a complex summoning jutsu. Hashirama was said to be the only Senju shinobi known to be born with the power of creating LIFE (Wood Release). This is evident decades later of how powerful and full of life his DNA currently holds in the earth (Danzo, Yamato, Tobi, Gedo Mezo, Edo Madara, etc). This proves that the DNA in the body of a “dead” Hashirama could have had enough life force for Tobirama to complete this S-Ranked summoning jutsu WITHOUT A LIVING SACRIFICE. It other words, Hashirama's DNA is so imbued with life, that the blood/body of a dead Hashirama could’ve still had enough life force to complete a “soul” summons (Edo Tensei).
MY ASSUMPTION: Hashirama was resurrected in order to avenge his own death.
I want you to think about something for a moment…
…Hashirama was obviously killed by a “worthy adversary”… and the shinobi powerful enough to kill Hashirama would instantly be a threat to the entire shinobi world. The threat of whatever evil shinobi powerful enough to kill Hashirama... is reason enough to believe Tobirama needed to temporarily bring his brother back to life. Who else would be able to defeat a shinobi POWERFUL ENOUGH TO KILL HASHIRAMA… but Hashirama himself...?
(Please Note: This portion (below) of the theory can be ignored, it is not vital to the main point of this thread.)
My assumption is that Tobirama used Edo Tensei to resurrect Hashirama after Madara or “Tobi” killed him. Yes, I am speculating that Madara (or Tobi) killed Hashirama, not another shinobi. I say this b/c obviously there is NO SHINOBI alive that can “currently” kill Madara, but history has shown us that Hashirama beat Madara more than once. So I cannot possibly believe that any shinobi was able to kill Hashirama except Madara himself! And coincidentally, I believe no shinobi would have been able to kill Madara except Hashirama himself!
TIMELINE SUMMARY (THEORY):
1) Hashirama “kills” Madara (or thinks he did) at the Valley of the End
2) Madara obtains Rinnegan or some other jutsu (Like Perfect Susano'o)
3) Madara fights Hashirama a second time (possibly with assistance of Tobi) with a NEW power... and “kills” him
4) Tobirama creates/performs Edo Tensei (a S-Ranked Space-time summoning jutsu) to temporarily revive Hashirama's soul back to his original body (a dead body which DNA is still embued with overwhelming life force)
5) Edo Hashirama kills Madara (for the 2nd time) and “dies” himself once his soul is at rest (Edo Tensei is released and Hashirama goes to the Pure World without a troubled soul)
Special Note: All souls DO NOT go to the Pure World after they die... if they have a troubled spirit. The White Fang is a great example of this, he committed suicide and his soul was not at peace at his death—so he remained in a state of “limbo” until he was finally able to speak to Kakashi. If Hashirama were killed by Madara as he claims, and Madara was still alive... Hashirama would have had a troubled spirit from losing to him. I could see an Edo Hashirama being released from Edo Tensei after he killed Madara (again) and put his soul at ease (same as Edo Sasori, Sai's brother, etc)
Side Note: This theory would also explain why Madara knows how to Release Edo Tensei, b/c he fought an Edo Tensei Hashirama. No one else is known to have used this jutsu except Orochimaru and Kabuto, and Madara did not know who Kabuto or Orochimaru was. But Madara could have easily witnessed Tobirama perform this jutsu reviving his own brother Hashirama. If this isn't the case, Madara must have watched Tobirama use human sacrifices to do Edo Tensei and I do not agree with that theory.
TL;DR
Tobimara created Edo Tensei w/o the need to kill off living people but Orochimaru added that feature on, Tobimaru being a S/T user was the fact that the could transport souls back to the impure realm.
A friend showed me his interesting ideas on the matter, so what do ya think? Sorry if repost, he likes to steal theorys
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