The two veteran metal acts perform tonight at 6:30 at the Agora. Nile formed in 1993 in South Carolina. At the time, the term technical death metal wasn't bandied about, but it has come to describe the group's music. Co-headliners Six Feet Under also formed in the early '90s and has released 14 albums since forming. Psycroptic and Embyonic Autopsy open.