This is so stupid even for this manga. The amount of energy and heat that is needed to make a diamond would kill or break a man, no matter what kind of pinnacle of human limits you're at.
You guys are actually complaining how stupid the act of crushing coal into diamond is when we just saw a clone of Musashi Miyamoto get his soul sucked out of him and spat out?
You guys are actually complaining how stupid the act of crushing coal into diamond is when we just saw a clone of Musashi Miyamoto get his soul sucked out of him and spat out?