Legion: XX is a cover album and the ninth studio album by American heavy metal band Lamb of God, as well as the second under their original name Burn the Priest. Its title pays homage to Legion Records which was the Philadelphia based independent label that released the band's first 7" split in 1998, with this release being twenty years later. The album was released on May 18, 2018 through Epic Records/Nuclear Blast. It is the last album to feature founding drummer Chris Adler before his departure from Lamb of God in July 2019.