Exhorder is an American heavy metal band from New Orleans, Louisiana. They are considered progenitors of the groove-oriented thrash sound later made famous by bands such as Pantera and Machine Head, and their music has been regarded as a large influence on the New Orleans metal scene. Initially active from 1985 to 1994 and reformed from 2008 to 2011, Exhorder has since reformed in 2017. To date, the band has released four studio albums: Slaughter in the Vatican (1990), The Law (1992), Mourn the Southern Skies (2019) and Defectum Omnium (2024).

Pantera is an American heavy metal band from Arlington, Texas, formed in 1981 by the Abbott brothers, and currently composed of vocalist Phil Anselmo, bassist Rex Brown, and touring musicians Zakk Wylde and Charlie Benante. The group's best-known lineup consisted of the Abbott brothers along with Brown and Anselmo, who joined in 1982 and 1986 respectively. The band is credited for developing and popularizing the subgenre of groove metal in the 1990s. Regarded as one of the most successful and influential bands in heavy metal history, Pantera has sold around 20 million records worldwide and has received four Grammy nominations.