One Punch Man: The Moon Blade, Explained

One Punch Man’s Atomic Samurai is one of the most powerful characters in the entire S-Class and has always been at this level since the start of the series. However, in the Monster Association arc, we saw the introduction of the Monster Cadres, a collection of terrifying Dragon Level threats that each had the power to destroy all of humanity if the S-Class didn’t stand in their way. Almost every character in the series got their moments to shine in this arc including Atomic Samurai, who was able to unlock the power of the legendary Sun Blade.