They all form a cipher, and they came to absorb it
A cypher is a battle that includes a circle of people around the individuals that are facing off or showing off their skills.
There are two types of cyphers, there’s a rap cypher; you can see Mos Def in a rap cypher here:
Or it can refer to a dancing cypher:
Obviously, in this line, Mos Def is referring to a rap cypher and is saying the people came to see him rap in the cypher.
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