Abracadabra is often said by stage magicians, and by Jay Electronica. He even named a song after it.
To Jay, the rap game is monotonous; he’s seen all of the “magic tricks,” and that somebody (Jay Electronica) needs to reinvent the genre. He’s also thinks that a lot of rappers are getting corny, or “abracadabralous,” like the generic magicians, which they are.
Alternatively, the line could be read as “Abracadabra-less,” meaning they don’t have any real ability or depth to their lyrics. Either way, to Jay, most mainstream rappers lack authenticity.
Jay is also expressing godlike power, because the “abracadabra” means “I create as I say,” which God often did when he made the Earth in Genesis. The word is from Aramaic, a Semitic language similar to Arabic and Hebrew, which was probably the language Jesus spoke most often, this being another way that Jay connects himself to God.
