If you think one of the 12 Supreme Grade swords the other 3 belonging to Roger Mihawk and Whitebeard
the most Cursed sword Shodai Kitetsu which came to be weaker with each new sword. Sandai and Nidai not even being in its league and made 100s of years later. Being the highest grade of the 3, is not only the first of the swords but the strongest (
Vol. 11 Chapter 97 (p. 13)
Tashigi explains the ranking of the Kitetsu swords, thereby mentioning the Shodai as strongest and most evil cursed sword) is belonging to a weakling you must be so DELUDED.
Old bald samurai is probably from the void century, there are panels of him using the (
Uchiko Ball – This is a silk ball on a stick. This ball contains fine stone powder use for polishing the blade and blade scratch removal) zoro does the same on sunny. There are panels of zoro and samurai gorosei using uchiko ball cleaning their swords in the same position. He will 100% fight zoro and is probably mihawks master as i suspect mihawk may be CD.