"Raining Blood" is a song by the American thrash metal band Slayer. It is the final song on the band's 1986 album Reign in Blood. Written by Jeff Hanneman and Kerry King, the concept deals with religion, specifically said to be about overthrowing Heaven.

The song is one of three tracks on Reign in Blood longer than three minutes, at four minutes and fourteen seconds. It ends with a minute of rain sound effects, closing Reign in Blood. Described as a "classic" by Allmusic, it is noted by fans as one of Slayer's most popular songs. As an almost permanent addition to their live sets, both Hanneman and King acknowledged it as their favorite song to play live.

There have been many appearances of the song in the media and elsewhere, including the South Park episode, "Die Hippie, Die" and Guitar Hero III: Legends of Rock, said to be one of the hardest songs in the Career Mode setlist. There is also a live appearance of the song in the compilation albums Headbangers Ball and Hard N' Heavy Vol. 61.

"Raining Blood" was written by Jeff Hanneman and Kerry King. D. X. Ferris said that "when Hanneman wrote the song, he envisioned a scene from a dark street or bloody back alley", and later went on to say that the song "described a banished soul awakened and hungry for vengeance." The second verse was written by King, who "pick[ed] up on Hanneman's title and in his new direction". The song, along with the rest of Reign in Blood, was recorded in 1986 in Los Angeles, California, with producer Rick Rubin.

...
Wikipedia