I’m throwin' down the gauntlet to see what hell I can raise

from Eminem (Ft. X Ambassadors) – Wicked Ways Lyrics on Rap Genius

Meaning

Throwing a gauntlet is a sign of challenge issued by a knight.

Em’s spitting hatred to provoke a response from the public. It’s a tactic that has worked for him for many years. His wicked way.

Also the wordplay with throwin' down the gaunlet and raising hell

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