Just in time for Halloween, Bok Nero and Army of the 12 Monkeys have collaborated on a horror-themed mixtape, Book Of Shadows, which explores the dark undertones of the 12 Monkeys collective.

Headed by Philly’s Dubstep Overlord, Architekt, Army of the 12 Monkeys holds roughly 12 members, who all contribute to one, cohesive sound. Founded in 2015, the group’s first efforts were picked up on by the likes of NFL player Le’Veon Bell and other talented artists looking for a slightly edgier sound to accompany their music.

One of them was rapper Bok Nero, who is no stranger to the EDM world and has performed with artists such as Kill the Noize, Tech N9ne and Zed’s Dead. He recently caught the ears of EDM superstar Steve Aoki and legendary beat maker, Jahlil Beats, which led to his most recent album, Lorde of Legions. Check out Book of Shadows in full above.