Quote Originally Posted by docdan63
Blackbeard can turn into his element just like everyone else, but (and I think this is true, because it's been stated during his fight with Ace) he can't let objects pass through him because he is a logia. The only thing is, it sucks in all of the attacks and doesn't let them go. Other than that, he himself can turn into darkness just like Aokiji can turn into ice and Ace into fire. I'll agree with all of your points if you agree with me on this one.
Yeah, I stand corrected. Only Condition 1 doesn't apply to him. Looking over the chapters again, Blackbeard IS darkness. I was trying to explain his physical vulnerability, forgetting that there was already an explanation for it (him being a center of gravity).