C
All current 12 great sword we know of are
Yoru - Black Blade.
Murakumogiri - Not black.
Ace - Not Black.
Shodai Kitetsu - Unknown.
https://cdn.onepiecechapters.com/file/opctcb/onepiece/onepiecechapters_955_15.jpg
Over here. Hitetsu himself said if enma is forged into a Black blade. it rank will increase from 21 great sword to 12 superior great swords.
Now coming to Shushui. It's among the 21 great swords not 12 superior swords. It rank must have increased from 50 great swords. Sandai kitetsu level to enma and ame no habakiri level.
By this speculation It's possible mihawk yoru was once under 21 great swords belt and when forged into a black blade it went 12 superior swords.
if all wondered if roger was a swordsman and shanks too why didn't they forge a black blade. maybe because forging a 21 great sword into 12 great swrds is easier to forge a 12 great sword into superior class on it's own. which no one has performed so far.
I think only exception we will ever get out of all the swords are from shodai kitetsu. it's among 12 great sword. and will turn black to enter a league of it's own.
it's probably with one of Gorosei. And this would represent threat level straw hats will be facing eos final battle. blackbeard gonna surpass rocks for sure.
no other sword into existense can do that , as there are only 4 known supreme great swords. and one of them is already a black sword. other two users died and shodai kitetsu user is unknown.
Shanks gryphon is probably one of the 12 great sword. I don't any other user of 12 supreme great sword.
there could be a possiblity swords used by Fujitora and Green bull are either 12 great swords or 21 great swords.
fujitora probably has 21 great sword. hence turning it black will make it ways into 12 supreme sword.
and for greenbul I'm expecting it to be 12 great sword and turning his sword will just give his sword a league of it's own.
why he can do so is other admirals uses swords but with their abilities. like aokiji makes ice sword, kizaru makes light sword. fujitora uses a sword because gravity can't make any sword.
but aramaki sword does allow him to make one. so why bother carrying a sword?
It could be another creation of SHimotsuki clan not kozuki clan. ((I'm specualting aramki to be from wano))
Shitmotsuki clan has blacksmith to make swords like enma and wado ichimonji and there could be more swords no doubt. But there's no 12 great sword under the belt of shitmotsuki clan.
kotetsu the craftsman of nidai kitetsu. and sukiyaki craftsman of sandai kitetsu. shodai is also probably from ancestor of kozuki clan not shimotsuki.
No idea how Gorosei has his hands on that sword. WG never invaded wano or was never succesful.
my speculations are Shodai kitetsu was built 800 years ago at the time of joyboy. and nidai was probably forged 400 years ago and sandai be current era.
it was said with each new kitetsu they became weak. so before wano was closed off. maybe that point previous gorosei or imu took the shodai kitetsu from wano.
Yoru - Black Blade.
Murakumogiri - Not black.
Ace - Not Black.
Shodai Kitetsu - Unknown.
https://cdn.onepiecechapters.com/file/opctcb/onepiece/onepiecechapters_955_15.jpg
Over here. Hitetsu himself said if enma is forged into a Black blade. it rank will increase from 21 great sword to 12 superior great swords.
Now coming to Shushui. It's among the 21 great swords not 12 superior swords. It rank must have increased from 50 great swords. Sandai kitetsu level to enma and ame no habakiri level.
By this speculation It's possible mihawk yoru was once under 21 great swords belt and when forged into a black blade it went 12 superior swords.
if all wondered if roger was a swordsman and shanks too why didn't they forge a black blade. maybe because forging a 21 great sword into 12 great swrds is easier to forge a 12 great sword into superior class on it's own. which no one has performed so far.
I think only exception we will ever get out of all the swords are from shodai kitetsu. it's among 12 great sword. and will turn black to enter a league of it's own.
it's probably with one of Gorosei. And this would represent threat level straw hats will be facing eos final battle. blackbeard gonna surpass rocks for sure.
no other sword into existense can do that , as there are only 4 known supreme great swords. and one of them is already a black sword. other two users died and shodai kitetsu user is unknown.
Shanks gryphon is probably one of the 12 great sword. I don't any other user of 12 supreme great sword.
there could be a possiblity swords used by Fujitora and Green bull are either 12 great swords or 21 great swords.
fujitora probably has 21 great sword. hence turning it black will make it ways into 12 supreme sword.
and for greenbul I'm expecting it to be 12 great sword and turning his sword will just give his sword a league of it's own.
why he can do so is other admirals uses swords but with their abilities. like aokiji makes ice sword, kizaru makes light sword. fujitora uses a sword because gravity can't make any sword.
but aramaki sword does allow him to make one. so why bother carrying a sword?
It could be another creation of SHimotsuki clan not kozuki clan. ((I'm specualting aramki to be from wano))
Shitmotsuki clan has blacksmith to make swords like enma and wado ichimonji and there could be more swords no doubt. But there's no 12 great sword under the belt of shitmotsuki clan.
kotetsu the craftsman of nidai kitetsu. and sukiyaki craftsman of sandai kitetsu. shodai is also probably from ancestor of kozuki clan not shimotsuki.
No idea how Gorosei has his hands on that sword. WG never invaded wano or was never succesful.
my speculations are Shodai kitetsu was built 800 years ago at the time of joyboy. and nidai was probably forged 400 years ago and sandai be current era.
it was said with each new kitetsu they became weak. so before wano was closed off. maybe that point previous gorosei or imu took the shodai kitetsu from wano.