

From [**Eight Tails**](http://naruto.wikia.com/wiki/Gy%C5%ABki) article:

> The lower left part of its horns was **permanently sliced off** in a battle
> with A, and the right horns were **destroyed** by its own point-blank Tailed
> Beast Ball when fighting the Ten-Tails.
>
> Instead of hind-legs, its lower half consists of its eight tails, which
> resemble the cephalopod arms of an octopus. **These tails will grow back in
> the event they are sliced off.**

If the tails are able to **grow back** , then why can't the horns too? Since
Gyūki is made of chakra, how was it possible to _permanently slice off_ a part
of its horns?


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naruto
Why didn't the Eight Tails' horns grow back?


It comes down to the basic fundamentals.

The bottom half of the 8 Tailed Beast is an octopus, but the top is more bull
like.

Bulls horns are like bone, unlike tentacles made of easily dividable cells,
the horns of an animal do not "grow from the top but from the bottom upwards"
they are like finger nails, the horns may eventually "grow" but not "heal".


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Orochimaru had cultivated the cells of the Eight-Tails' horn, which grew into
the piece that was cut off by Killer A. That horn had some of the Eight-Tails
chakra. The Eight-Tails cannot grow the horn because it is made of chakra and
the chakra comprising the horn was in a cultivated horn of the Eight-Tails. It
can't just grow it back and create chakra out of nowhere. That violates the
Law of Conservation of Energy. It's just common sense. You can't get something
out of nothing. The Eight-Tails' tails regrow because the original tails
decayed when cut off from the main body and released the chakra which
reaccumulated in the main body so the tails could grow back. The horn did not
grow back because the chakra released from the horn which was cut off from the
main body and later decayed had reaccumulated in the horn cultured by
Orochimaru. My source is Naruto Shippuden Season 14 Episode 318 "A Hole in the
Heart: The Other Jinchuriki".


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