Madvillain is a hip-hop duo consisting of rapper MF DOOM and producer Madlib. They gained critical acclaim for their 2004 album "Madvillainy," which is celebrated for its intricate lyrics, unique production, and innovative sampling. MF DOOM's distinctive flow and complex wordplay combined with Madlib's eclectic and experimental beats created a timeless underground classic. The project is revered for its artistic depth and has significantly influenced the genre. The duo is known for their enigmatic personas and contributions to alternative hip-hop culture.