Slayer is an American thrash metal band formed in 1981 in Huntington Park, California. Known for their aggressive musical style and dark lyrical themes, they are considered one of the 'Big Four' of thrash metal, alongside Metallica, Megadeth, and Anthrax. Their 1986 album 'Reign in Blood' is often cited as one of the greatest heavy metal albums of all time, featuring iconic tracks like 'Raining Blood.' Slayer's fast tempos, intricate guitar work, and powerful vocals have influenced countless bands across various genres. With a career spanning over three decades, they have left an indelible mark on the metal scene and continue to be celebrated for their contributions to music, even after their farewell tour in 2019.