One Piece has dropped several hints at which Devil Fruit Rocks D. Xebec had, which could explain his and Blackbeard's actions ...

One Piece has seen quite a few Devil Fruit awakenings within the story, but not all of them were powerful enough to be placed ...

2 Supa Supa no Mi Daz Bonez' Devil Fruit The Supa Supa no Mi allow's the user's body to gain the characteristics of a steel blade. Because of this, Daz Bonez was able to go toe to toe with Zoro.

If you wish to learn more about Trafalgar D. Water Law in One Piece, learn more about his character and more about him here.

Going forward, One Piece will likely explain this mystery, one that is undoubtedly tied to the legendary Devil Fruit. However, the brief context from the latest chapter may already hint at the answer.