COLOR="DarkRed"]Zoro and the Blade Hakis
I believe the meitous are capable of evolving the kenboshoku Haki of their wielders to an even more powerful Haki .Why this is so Oda knows but i believe it is.Now im nots saying everyone who wields a meitou has an Evolved Kenboshoku its more like 50/50.However this evolved version is very useful to swordsman,and I call it Zenshoku Haki.
ZENSHOKU Haki
This haki allows the user to enter a special meditative state where user experiences a "oneness" with all things.In this state the user is capable of hearing the flow of energy around him(The breath of all things),and this has various uses.Reading the flow of energy can grant one the ability to sense and anticipate movement,undesratand how things in nature work,detect energy signatures etc.Basically listening to the breath gives the user the power to sense all things living or non living strongly.
The user of this haki also experiences an exceptional oneness with his sword/s(that caused the evolution in the first place) to the piont he can manipulate/control the energy of the sword depending on his skill. Zoro has demonstrated the basic use of this Haki by manipulating the energy of his sword/s to produce stronger slashes-slashes tht cut through steel,or send air slicers. Whilst Zoro Has shown that he is capable of manipulating the energy of his swords,he hasn’t shown that he is capable of contolling that energy which is an entirely different thing.
So what kind of techs does controlling the energy of the swords grant (aside of course from stronger slashes).Well it depends on the nature of the swords energy(and note the nature of the swords energy depends on its physical characteritics).for example If the energy flowing through the sword is ideal for schockwave attacks, contolling the energy will give birth to shock wave techs,if the energy flowing through the sword is ideal for flame attacks,contolling it will give birth to flame techs and so on.
I believe Zoros training with Mihawk will help him master this ability(he seems to have an affinity for this Haki)and will be able to sense all objects living and non living as well as master the energies of his sword/s giving birth to unique techs for each swords and some bad *** combo attacks.
Also there are certain "special"meitous that evolve Busoushoku Haki as well but in most swordsman avoid using this swords because this particular evolution is very dangerous.Most of the few who use this special swords suffer the negative effects(which is why such swords are reffered to as Cursed) .As a result the number of swordsmen that use an Evolved Busoshoku is very,very small. Most stick to normal Busoshoku Hakie.g Vista,Rayleigh.
I call the evolved version of Busoushoku Haki -RinneShoku Haki.
Zenshoku and Rinneshoku Haki-these are the Blade Hakis
Zoro wields 3 meitous one of which is cursed.As a result Zoros Haki is not busoushoku and kenboshoku BUT Zenshoku and Rinneshoku the 2 Blade Hakis.
He pulled out Zenshoku in his fight with Mr 1 and activated Rinneshoku in his fight with Kaku. So what exactly is the power of Rinneshoku Haki you ask?The explanation is below
RINNESHOKU Haki
Busoushoku Haki manifests a persons fighting spirit as an invisible suit of armor but RINNESHOKU allows the user to manifest his fighting spirit as one of 6 spirit forms .The six spirit forms are in order of strongest to weakest: Deva-Supreme class,Deva-middle class,Deva-lower class,Naraka,Asura,Preta.
Each has its own special ability.For example when Zoro uses Asura it not only grants him 2 extra bodies with duplicate weapons,but its special ability is to increase his power and speed.
The spirit form a users Rinneshoku Haki takes wields depends on how trained his fighting spirit is.If Zoro trained his spirit enuogh,he wouldnt be using Asura but a more powerful form like Naraka.
Another quality of the spirit forms is that they are capable of bypassing Devil fruit defences in the same way as Busoushoku Haki.
The major disadvantage about Rinneshoku is that there seems to be TIMELIMIT to how long it can be used .with training the time limit can be legthened a bit but its still there.
Im guessing Zoro will be training his spirit under Mihawk and Peronas ghost ability will be used to train him,in fact accelerate his growth.Im pretty sure Hell come back wielding a new Spirit form-Naraka or Deva-Lower class
so in summary heres what Zoro will come back with
1.Hypersense of all things living and not living things
2.Unique techs for each sword and he will use thi unique techs in very powerful combos
3.He no longer be using Asura but the more powerful-Naraka or Deva-Lower class which all have the power to bypass devil fruit defenses