One Piece Episode 486

[chambers]

ok so lets start the speculation over what is unique in teach...

there have been a couple of ideas i have read and the two most plausible is either that he ate some kind of cerebus fruit allowing him to absorb 2 other fruits powers or that his personality is split.

There isnt much evidence to suggest another fruit giving him this ability but there is perhaps more to suggest a split personality. In the manga whenever blackbeard is struck his tone changes to be so cowardly and afraid, in the anime this looks like hes just a typicall bad guy crying for mercy but, to me at least in the manga i felt like a really stark change and contrast. There is also the way he act so playfully somtimes like with luffy just before the skypiea arc and then vicisious other tims and cowardly liks stated above. There is also blackbeards flag, three skulls. Also he has been shown in the past to have three guns holstered in his belt.

It could also be that its an ability of the "D" blood line, remeber we still dont know why roger was the strongest man in the world and we dont know what powers dragon has either, its not totally inplausible to suggest that the D's habe a unique physcial or mental makeup that allows them this ability