This isn't super rare, too hard to find, or an original version, but it is one of the illest remixes you will ever hear so in my mind that qualifies it as a Rap Treat. DJ Spinbad took KRS One's acapaella of "Hip-Hop vs. Rap" and layer every beat to every classic line KRS borrows. If you fall under the Rap nerd category then you need no explanation. Ill. As. Fuck.
KRS One