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In Naruto Shippuden, Madara tells Sasuke that he's so powerful because he
could awaken a _Straight Tomoe (Choku Tomoe)_ Mangekyō Sharingan. I wonder
what is the difference between a Mangekyō Sharingan and a Straight Tomoe
Mangekyō Sharingan and how is it more powerful than normal one?


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naruto
How is Straight Tomoe Mangekyō Sharingan awakened? How is it superior to normal Mangekyō Sharingan?


The [Choku-tomoe Mangekyō
Sharingan](http://konohalibrary.wikia.com/wiki/Choku-
Tomoe_Kaleidoscope_Sharingan) is the completed transformation of the Mangekyō
Sharingan, also known as [Eternal Mangekyō
Sharingan](http://naruto.wikia.com/wiki/Mangeky%C5%8D_Sharingan#Eternal_Mangeky.C5.8D_Sharingan).
Sasuke and Madara are the only known wielders that have achieved it throughout
the series.

**How to awaken the _Straight/Choku Tomoe Mangekyō Sharingan_ a.k.a. the
_Eternal Mangekyō Sharingan_**

> Transplant the eyes of the clan member to the user. In
> [Madara's](http://naruto.wikia.com/wiki/Mangeky%C5%8D_Sharingan#Madara_Uchiha)
> and
> [Sasuke's](http://naruto.wikia.com/wiki/Mangeky%C5%8D_Sharingan#Sasuke_Uchiha)
> case, they acquired the eyes from their brother, and both of them and their
> brothers already have Mangekyō Sharingan awakened. It's not sure that
> whether both donator and donor has to have Mangekyō Sharingan awakened in
> the first place in order to activate the Eternal Mangekyō Sharingan after
> the transplant. Although, it is not guaranteed to give everyone regained
> eyesight and ocular powers.  
>  
>  ![](https://i.stack.imgur.com/RAy2a.jpg)

  
**How is it superior to the normal Mangekyō Sharingan**

> It will usually regain the user eyesight. The straight tomoe of the Eternal
> Mangekyō Sharingan grants the user fluidity in the movements when fighting.
> It is suggested that the eyes can support non-Mangekyō ocular powers such as
> Izanagi and Izanami, when Sasuke asked his brother how they would use
> Izanagi to defeat Kabuto. You can find more abilities about the Eternal
> Mangekyō Sharingan [here](http://konohalibrary.wikia.com/wiki/Choku-
> Tomoe_Kaleidoscope_Sharingan#Abilities).


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Upon using Mangekyou Sharingan, the user's eyesight will gradually gets worse.
The more the frequency and the more strain the user puts on the eyes, the
faster the process will be. Using Mangekyou Sharingan techniques such as
Amaterasu, Tsukuyomi, and Susano'o puts great strain on the eyes, much much
greater than just activating it. Thus, Mangekyou Sharingan will gradually lose
its eyesight until it became completely blind. The evidences are:

  1. Itachi was almost blind during his fight against Sasuke.

  2. Sasuke was nearly blind after the fight against Danzo.

  3. Madara said that he was pretty much blind when he transplanted his brother's eyes.

The Straight Tomoe Mangekyou Sharingan is a Mangekyou Sharingan that **won't
gradually lose its eyesight** like a normal Mangekyou Sharingan. Thus, it is
also known as the Eternal Mangekyou Sharingan. This is the biggest difference
between the two.

Another difference between the two is that an **Eternal Mangekyou Sharingan
(henceforth EMS) is awakened by transplanting another's Sharingan**.
Throughout the canon (the manga) only Uchiha Madara and Uchiha Sasuke has
achieved this. Both transplanted their brother's eye and both them and their
brothers has already achieved Mangekyou Sharingan (MS) when the
transplantation was done. An **MS is awakened by watching the death of someone
dear** , which in Itachi's case was the death of his best friend, Uchiha
Shisui. In Sasuke's case is the death of Itachi. If I recall correctly Madara
awakened his MS after the death of one of his brothers.

An EMS is not more powerful than an MS in term of power. It also doesn't
unlock more occular jutsu. Upon acquiring EMS, Sasuke's Amaterasu didn't get
any stronger. EMS only restores an MS' eyesight and removing its drawback of
getting blind, which is why it is called **Eternal**.


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An Eternal Mangekyo Sharingan uses less chakra. That's why it's more powerful
because it can be used for a longer period than the Mangekyo Sharingan with
the same level of chakra.


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Madara states that their bond may go deeper than blood, meaning he is aware of
the possibility that Sasuke is his modern day reincarnate. He noticed that
Sasuke has an Eternal Magenkyou Sharingan, something that Madara knew only he
had accomplished. Is the Eternal Magenkyou Sharingan stronger? Yes. Very much
so. Considering that with a regular Magenkyou Sharingan you can’t overuse the
abilities before losing sight, falling ill, or wasting chakra, you cannot
truly master or learn any of these abilities. Such as the perfect Suasnoo, the
flame control techniques used in unison with Susanoo, and many other examples
that have to do with MS specific abilities. The other strength behind EMS is
it allows the user to have even better eyesight, and also allows for them to
see in the dark as stated by Sasuke. Only Madara and Sasuke have truly
accessed all of the fully developed versions of the base MS abilities because
of their extended usage of their EMS.


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