User blog comment:Don7/Blackbeard 2 df abilities/@comment-4754162-20130218055045

Good thinking Don.

However that theory will render his own DF not-so-unique, thus could not explain why initially he was so desparate and insist to find the Yami Yami no Mi and upon finding, was willing to go as far as risking the wrath of WB in killing a fellow nakama for it.

I like your theory but I prefer the common idea about the affliction of the Yami Yami no Mi in stealing other DF powers.