London's black midi carved out a cult following almost immediately after forming in 2017, and continued garnering acclaim as their sound quickly expanded, fusing genres such as math rock, prog, post-punk, and avant-jazz. A handful of video recordings of their live shows and the 2018 single "bmbmbm" were strong enough to gather significant buzz around their meticulously constructed yet feral rock sounds. The band released their 2019 debut album, Schlagenheim, to critical acclaim, and follow-ups Cavalcade (2021) and Hellfire (2022) found the band bringing even more disparate elements into their dynamic and undulating sound.