Mihawk uses one of the 12 Supreme Grade Blades, Yoru. Mihawk is also one of the two characters we've seen that have turned their sword into a Black Blade, permanently changing its attributes.

One Piece’s legendary weapons go beyond swords—exploring iconic non-sword Meito, from kanabo to tridents, and their powerful ...

The Elbaf arc hints at the existence of multiple Supreme Grade Weapons, with Ragnir, Cerberus, and the Giant Sword being key contenders ... and though 12 of them exist, currently, only 5 have ...