having a great grade sword is nothing special for someone on zoros level
shushi is black yet it is not a supreme grade
shushi is black yet it is not a supreme grade
shusui was most likely a lower rank before it became a black blade
"having a great grade sword is nothing special for someone on zoros level"
you are proving my point actually
oden was an emperor level pirate with two blades in the 21 grade
ryuma carried a blade in the best 21
zoro isnt on even that level and has carried a two blades ranked in the 21 as far back as prets.