Except Blackbeard never claimed that and you can’t read. Lol
“Infinite darkness” could be a meaningless hype statement, it could be a comment on how much shit Blackbeard can trap in his darkness, it could be a reference to the nature of dark itself etc….
There are several other ways to read this comment that don’t equate to “this shit is as strong as a black hole” lol, you would have realized that if you weren’t a small minded idiot