Probably a similar reason to why we just recently found out Kuzan had knuckles and Kizaru had an impressive defense, where the opponent wasn't "worthy enough" in a sense
He treated the scabbards and momo like scrubs during his time on Wano, I imagine if he was facing someone he thought as dangerous then he would pull out the blade. Cause black blade or not it's weird how he has it at all if he doesn't use it.
He treated the scabbards and momo like scrubs during his time on Wano, I imagine if he was facing someone he thought as dangerous then he would pull out the blade. Cause black blade or not it's weird how he has it at all if he doesn't use it.
I doubt he's so entitled and egotistic that he thinks one of his colleagues who were appointed for being just as strong as him is a fodder who he can beat without his black bade.