High Quality Content by WIKIPEDIA articles! Reign in Blood is the third studio album and the major label debut by the American thrash metal band Slayer. It was released on October 7, 1986 through Def Jam Recordings. The album was the band`s first collaboration with record producer Rick Rubin, whose input helped the band`s sound evolve. Reign in Blood was universally well received by both critics and fans, and was responsible for bringing Slayer to the attention of a mainstream metal audience. Kerrang! magazine described the record as "the heaviest album of all time," and a breakthrough in thrash metal and speed metal. Alongside Metallica`s Master of Puppets, Anthrax`s Among the Living and Megadeth`s Peace Sells... but Who`s Buying?, Reign in Blood is considered by critics one of the most influential heavy metal albums of all time, thrash metal in particular.