Im doing this on my phone so im not spoiling any of the images πΏ
Rare haki:
Future sight observation
"Among the mightiest in the world l, youll find some who can see a little bit into the future!"
So far we know katakuri and luffy can use it
Internal armament
Hyogoro someone from wano a place that essentially specializes in barrier haki. With he himself specifically being known for use of it was amazed by luffy being able to use internal armament admitting it was beyond his ability. With many barrier armament users in general never getting to that level
So far we know know luffy and rayleigh can use it
Speaks for itself and im not listing everyone πΏ
Conquerors infusion
An ability only a handful of conquerors (something already hella rare) are able to use
Known users luffy, yamato, preskip yonko, and roger
Devil fruits:
While definitely more dependent on the creativity of the user more than the others theres a more or less clear ranking of which are weaker and stronger
Like if 2 characters are exactly equal in every other department but 1 has is given the hawk fruit and the other the pteranodon fruit im pretty sure most of us can agree the dinosaur wins
Same with these
Tho in general
A rare ability for most devil fruit users that especially unlocks your fruit to the next level
Meito
Again give have 2 people with everyother stat exactly the same and give 1 a random marine sword and give the other 1 of the 50 fine grade the one with the better sword wins. Gap increasing more the higher quality
Not only are they forged better but many of them have their own special traits and quirks to help the user get stronger
Black blade
While we don't know exactly how its done yet but being able to turn your blade black is obviously something special and shows you've reached a different level of something
Final point:
While having 1 of these abilities doesn't automatically mean your stronger than anyone that doesn't have that same ability. It does show that you are special at the very least in your respective group. And the more of these abilities someone has the more special they are within the world.
Rare haki:
Future sight observation

"Among the mightiest in the world l, youll find some who can see a little bit into the future!"
So far we know katakuri and luffy can use it
Internal armament


Hyogoro someone from wano a place that essentially specializes in barrier haki. With he himself specifically being known for use of it was amazed by luffy being able to use internal armament admitting it was beyond his ability. With many barrier armament users in general never getting to that level
So far we know know luffy and rayleigh can use it
- Barrier haki is better use than basic armament but it really isnt that rare. With people like marigold, sentomaru, and many not especially strong wano samurai using it





Speaks for itself and im not listing everyone πΏ
Conquerors infusion

An ability only a handful of conquerors (something already hella rare) are able to use
Known users luffy, yamato, preskip yonko, and roger
Devil fruits:
While definitely more dependent on the creativity of the user more than the others theres a more or less clear ranking of which are weaker and stronger
Like if 2 characters are exactly equal in every other department but 1 has is given the hawk fruit and the other the pteranodon fruit im pretty sure most of us can agree the dinosaur wins
Same with these

Tho in general
- Logia are seen as the strongest and rarest class
- With teach's darkness fruit being considered even more unique then the average logia
- Enel's goro fruit said to be one of the few devil fruits to be considered invincible from robin
- Sakazuki's magma fruit said to be one of the highest offensive abilities
- Zoans are usually pretty simple giving you a physical buff and leting you turn into your animal. Carnivorous ones usually giving a better boost when it comes to straight up combat
- With ancient ones usually being even more tough, strong, and rare than normal zoans
- Mythical zoans obviously being the most rare type of zoan and even more rare than your average logia. Base giving you the best animal buff + a paramecia like abilities
- Paramecia are pretty much just random ass super powers being the biggest gamble and needing the most creativity to actually make useful most the time
- The quake fruit being one of the staight up strongest paramecia fruits out there. With oda saying in vol 58 "he's a Paramecia who isn't any weaker than the Logias"
- The mochi fruit being a "special paramecia" thats acts pretty much exactly like a logia
- Laws ope ope no mi being called the ultimate devil fruit due to its hax, eternal life ability, and connection to the mariejois treasure

A rare ability for most devil fruit users that especially unlocks your fruit to the next level
- So far we only have 2 characters confirmed master it with doflamingo and katakuri
- Kid and law still in their early stages of awakening and have yet to fully master it while still having stamina problems
- The impel down jailer beast who are awakened but likely not really mastered due to them basically being brainless beast with no real control over themselves
Meito

Again give have 2 people with everyother stat exactly the same and give 1 a random marine sword and give the other 1 of the 50 fine grade the one with the better sword wins. Gap increasing more the higher quality
Not only are they forged better but many of them have their own special traits and quirks to help the user get stronger
Black blade


While we don't know exactly how its done yet but being able to turn your blade black is obviously something special and shows you've reached a different level of something
Final point:
While having 1 of these abilities doesn't automatically mean your stronger than anyone that doesn't have that same ability. It does show that you are special at the very least in your respective group. And the more of these abilities someone has the more special they are within the world.