A true swordsman


Name: Shusui (Japanese for "Clear Autumn Water")
Origin: One Piece
Type: Katana, classified as one of the twenty on O Wazamono (“Great Grade Swords”) and as a Kokuto (a “Black Sword”)
Powers and Abilities: In the hands of a master swordsman, it complements the user’s swordsmanship by greatly enhancing the user’s cutting power and destructive potential, it is also remarked as an exceptionally hard and heavy sword
Destructive Capacity: Depends on the user, multi-continent level+ in the hands of Zoro
Wielder(s): Roronoa Zoro, formerly wielded by Ryuma
Material or Element: Possibly steel (though not certain, given the precedents of other metal alloys in the verse and that Shusui has been emphasized as an exceptionally hard and heavy sword)
Needed Prerequisite for Use: Expert swordsmanship (Zoro noted that Shusui is a “problem child” with a "temper" that makes it harder to wield), possibly superhuman strength (given that Zoro remarked on its weight)
Notable Attacks/Techniques or Alternate Forms:

Other: