Sometimes dreams, peace of paper I got reams
Lupe is probably saying that he has:
c) page upon page and book upon book of rhymes
Reams can mean:
A quantity of paper usually counted in sheets.
A very large amount. Often used in the plural.
He says peace of paper, trying to not give money any importance, so that the listener would not think that this song is about money, mainly because he doesn’t give a fuck about the latter, but raps with a purpose, to send a message. check this, for more info.
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