You forgot the strongest sword of all One of the two swords ranked in the God Grade Swords Forged in the heat of battle by fusing a soul and a sword A cursed blade, only ever wielded once, by the Strongest Swordsman of all time Roronoa Zoro That's right... It's name is "Hana Araashi - Nose Storm" and the soul occupying that blade was none other than Sogeking