Kamui (Kakashi's offensive kamui) is faster than amaterasu! Manga proof!

[Mellanoma]

Well, i will make it very short:

Kakashi DIDNT HAVE MS ACTIVATED when sasuke fired the susanoo arrows, he had 3 TOMOE SHARINGAN

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, so to warp the arrows he had to:

-Activated MS
-Gathered the chakra
-Pointed at the arrow
-Activated the warping zone
-Warped the arrow

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All of this in time to warp a SUSANOO ARROW (VERY FAST), in a result of this warping speed, kakashi could warp BM naruto so fast that obito didn't notice about it.

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Sasume WITH MS already activated has to:

-Gather chakra
-Close his eyes
-Wait for the eye bleeding
-Open his eye
-Fire the flames

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In a result of this lack of speed compared with kamui, the raikage dodged it.

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It's plot jutsu... For example... IF Sasuke really wanted to kill Kakashi why didnt he use Amaterasu instead of Susanoo Arrow

 

[Sherlock.]

Kamui is a teleportation tech.... So obviously yeah.... =D =D

 

[FourthLegacy]

Wow, that was pretty fast. Too bad he can only use it a limited amount of times U_U

Kakashis gettingt there tho.