The sword used by the best swordsman in the world, "Hawk Eyes" Mihawk. It is one of the 12 "Saijo Owazamono" Swords and his blade is tilted with the "Chouji" thread with double irregular pattern. It's monumental size and dark blade and long studded handhold gives it the appearance of a cross.
Powers and Stats
Tier: At least Low 6-B, likely 6-B
Name: Kokuto Yoru
Origin: One Piece
Wielders: Dracule Mihawk
Speed: Varies depending on wielder
Durability: At least Small Country level, likely Country level (Given that Mihawk used this sword to clash with Shanks in their duel, clashed with Vista's swords without any damage.)
Range: Extended human melee range, at least several kilometers with ranged slashes.