The Strongest Sword

Name: Yoru (Japanese for "Night"), sometimes referred to as Kokuto Yoru
Origin: One Piece
Type: Großes Messer (German for “Great Knife”, a single-edged greatsword with a slight curve at the end of the blade), classified as one of the twelve Saijo O Wazamono (the highest quality swords within One Piece, means “Supreme 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
Destructive Capacity: Depends on the user, multi-continent level+ in the hands of Mihawk
Wielder(s): Dracule Mihawk
Material or Element: Possibly steel (though not certain, given the precedents of other metal alloys in the verse and that Yoru is the strongest sword in One Piece)
Needed Prerequisite for Use: None notable, though master swordsmanship is needed in order to fully harness its potential
Notable Attacks/Techniques or Alternate Forms: