The One Piece series has always featured swords. However, the series rarely elaborate on swords as a form of fighting. Having largely focused on devil fruits and haki, swords have been left out. Zoro has been the most important swordsmen in the series. Through him we have the most exposure to swords and how they are used in combat. One Piece has classified swords by their qualities. The three classifications are, Meito, Kokuto and Yoto. The Meito (Famed Blade) class is a sword that has gained such fame that it can be recognized by sight. Kokuto (Black Blade) are swords that are blacked colored. Finally, the Yoto (Mystic Blade) class, carries a curse that causes misfortune to its wielder.
The blades classed Meito are also ranked by “grade.” The grades are Grade swords, Skillful grade, Great grade and Supreme grade. There are an undetermined number of Grade Swords as they’re the lowest grade. There are 50 Skillful Grade Swords, 21 Great Grade Swords and 12 Supreme Grade Swords. In chapter 955, titled Enma, Zoro is given his second of two Great Grade Swords. Enma is a Meito that use to belong to Kozuki Oden, it’s also the only weapon said to have harmed Kiado. A masterpiece from the legendary swordsmith Shimotsuki Kozaburo, it is describe as being able to “cut through to the bottom of hell.” Tenguyama Hitetsu believes that if Zoro can make Enma a black blade, it’s rank would increase.
Enma is difficult to wield. Enma is able to draw out the wielders Busoshoku Haki on it’s own, it can result in the force of a strike being greater than intended. It was stated that if Zoro was a lesser swordsmen he would have been turned into a “dry husk.” Zoro is able to force his haki back from the blade. The Wano Country Arc seems to be a turning point in regards to focusing more on swords and the power. The chapter largely focuses on the preparations for the upcoming battle. A handful of days are left until the raid, Robin reveals that the Beast Pirates have 20,000 men and Orochi has 10,000. The Alliance only has 4,000. Clearly, they’re at a numerical disadvantage. However, I think that they have better “quality” of warriors. With Luffy mastering the new Haki and Zoro able to master Enma It think that they will be fine.