User blog comment:Yatanogarasu/What Did Blackbeard Do to Get the Gura Gura no Mi?/@comment-64.24.85.189-20111227035104

ok honestly I believe it has nothing to do with his devil fruit power but instead with the cover, think about it WB wasn't fully dead when we went under but was when he came out. Maybe the cover is made of an unknown material that has yet to be revealed or maybe it has it's own devil fruit power who knows.