Brooklyn rap prodigy Joey Bada$$ is back with a new track produced by MF DOOM. Yep, the 18-year-old MC and the uber-prolific underground rap legend have teamed up for a jam from the upcoming Summer Knights mixtape. If that doesn't get your blood pumping, you may need to see a therapist.

"Amethyst Rockstar" has a brittle but laid-back beat that contrasts nicely with the fired-up verses from Bada$$ and his Pro Era companion Kirk Knight. The latter's verse is a particularly sick rant with more than a few hilarious quotables, including, "I'm in her booby trap and that's some clever-ass cleavage."  We're not the only ones who noticed Knight's star turn—Black Hippy's Ab-Soul threw some Twitter love at him after this track dropped. 

Listen to "Amethyst Rockstar" above and keep an eye out for Summer Knights when it hits the Internet next Monday.