Eminem just used a Uterus Pond wordplay on his new album

[Witty]

Got the most content on the continent
And constant compliments give me confidence
A cross of common sense and incompetence
I'm cognizant that conflict's a consequence
Of accomplishments accomplished through competition
I've conquered and conked 'em into unconsciousness
Though conscious, I conjure this King Kong and just
Call me "Kamikaze, " I'm concoctin' this

I wouldn't imagine there's a better example of assonance out there than those lines above. Not only am I sure no other rapper is capable of doing that, I would go as far as to say there may not be a writer in general who can better that.

I might be wrong and if I am I would love to see it.

For me Eminem isn't the best rapper ever, but he's easily the best writer in hip hop history.