what grandmaster caz song is this? / what was the glimmering sample for the beat?

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https://www.reddit.com/r/hiphop101/comments/k09w2x/track_id_challenge_help_please_old_school/

Rock the mic? not necessary
the grandmaster caz got a rhyme library
Rapping (?) now til the break of day
don't have a big (?) mouth I got this to say
but then ya, without a rhyme you start sounding dumb
it's just me, me, me, GMC, I am the captain of the (?)
and I'm down with (?name?) to sell yourself
I told (?name?), (?name?) you're the number 1 breaker
get on the mic to show em that you're the (?) hut maker
...
you hear my voice on cassettes
you're all in check
(?name?) is an abbot put on wax