When hip-hop’s black boho scene and its ebony-and-ivory indie underground trace their roots, the common ground they find is the late-’80s/early-’90s Bronx rap group Ultramagnetic MCs and its idiosyncratic star “Kool” Keith Thornton. For the boho side, the touchstone is the classic 1988 Ultramagnetic MCs debut Critical Beatdown (the group is referenced on the latest […]