Avenged Sevenfold, the veteran hard rock band that formed in 1999, returned with its eighth album last year. Inspired by the writings of existentialist author Albert Camus, the songs center on abstract concepts. The soaring single, "Nobody," features operatic vocals and cinematic synths. Tonight at 6:30, the group brings the tour in support of the album to Rocket Mortgage FieldHouse. Poppy and Sullivan King open.