But the manga says that the attack on WB was the strongest slashing attack in the world and he had those green rays and even so Jozu stopped him without a full body diamond and Vista forced him to postpone the fight and Vista does not have a black blade and neither use a serious attack on mihawk
Also mihawk said he wouldn't restrict himself and if he can cut whatever he wants then what happened to Jozu, Buggy and Vista?
Are you going to say the garbage of flesh and blood?
So, please, explain to me, what was the use of having a kokuto for mihawk?
This argument again. How many times have this been countered.
Mihawk never stated that was his strongest slash, just some random person.
Jozu was in diamond mode when he blocked the attack. We see his body after the attack and the only part not covered in diamond was the left side of his face.
Vista never forced him to postpone. Mihawk chose to postpone the battle, who Vista agreed, so he could test Vista away from the battle because Marines where attacking everyone, friend or foe.
Who said you need a Black blade to clash with black blade user? Think about it. Do you believe you need adv CoC to fight and injured Kaido, an adv CoC user. The weakest person in the world could still attack Kaido.
Mihawk did restrict himself during the war. His ery first attack against Luffy was a light attack with his eyes closed.
What's the benefit of a Black blade? We don't know all of the benefits or how it's created. We know one benefit to using it, it makes the sword so strong it doesn't break. That benefit applies to anyone using a black blade.
A black blade could be the results of obtaining the ability to cut anything or nothing. The Pinnacle of swordsmanship. Obtaining that ability make your sword unbreakable because it takes on the user will unbreakable and unyielding will.
Why must everything about a black blade be explained right now? There's still plenty of time. We are still getting new information about the manga.