I had to look up nerdcore, I admit shamelessly. I can definitely see how this fits into nerdcore, it's definitely a blend of hip hip and what could be fantasy elements.
Not really sure how to best describe what I'm poking at here: the three sections you can see on the waveform as being distinctly different, I know the drum line is important to the hip hop side of it but it may be interesting to subdue them a bit during those three lower sections. It may add a bit of a variance between the more traditional hip hop beat and what ends up being closer to medieval instrumental.
Still struggling for the concept: rap battle of hip hop vs medieval, each one takes a lead in sections as the song progresses until they come together for a climax. In one corner, Eminem. In the other corner, Prince Arthur's finest bards.