One Piece theory explains why Black Blades are so rare (even amongst legends like Roger & Whitebeard)

In the vast world of One Piece, swords hold a momentous role­ as formidable weapons wielde­d by exceptionally powerful characters.

Why didn't Oden, Shanks, and even Rayleigh have a black sword in

One Piece: Biggest Mysteries And Questions

In One Piece chapter 966, when Whitebeard and Roger clashed and

Gol D. Roger, One Piece Wiki

One Piece: 10 Characters Who Can Rival Whitebeard, Ranked By Strength

Can Garp and Sengoku beat Whitebeard and Roger in One Piece? - Quora

Is Whitebeard the strongest character from One Piece? - Quora

Untitled on Tumblr

Zoro - News - IMDb

Powers & Abilities - Oden and Kaido surpassed Whitbeard and Roger

How to forge a black blade and Why Roger & Whitebeard can't. : r

One Piece on Fanfiction-For-Anime - DeviantArt

One Piece; 4th theory; Why Buggy is not the man he claims he is

Theory: How Black Blades are forged : r/OnePiece