Kool Keith is hip-hop's most legendary weirdo. He stole the show as part of the golden era group Ultramagnetic MC's, before breaking out and casting himself as extraterrestrial, time-travelling gynaecologist Dr. Octagon on '96's Dr. Octagonecologyst. Since then, the Bronx-born rapper has paraded a kooky collection of aliases—including Black Elvis, Big Willie Smith and the RZA-mocking Robbie Analog—while dropping a prolific series of entertainingly unhinged albums. Consider this your gateway to a hip-hop twilight zone.