Raining Blood is the closing track on Slayer's 1986 album Reign in Blood, written by guitarists Jeff Hanneman and Kerry King. Produced by Rick Rubin, the album helped define thrash metal, and this song became one of the band's signature pieces, played live for decades. Its intro has since been sampled, covered and clipped across gaming, wrestling and extreme sports culture online. The riff's lasting fame comes from how recognisable those first seconds are, even detached from the full four-minute song.