With Sepultura, Brazilian brothers Max and Iggor Cavalera defined South American thrash in the '80s and early '90s. Their fourth album under the Cavalera Conspiracy banner sees them recapturing the creative energy and intensity of those early offerings with neck-snapping riffs and maniacal solos on “Insane” and “Terror Tactics,” while “Impalement Execution” and “Spectral War” offer a modern, industrialized take on extremity. “Hellfire” features a guest vocal appearance from Godflesh’s Justin Broadrick, who expertly enhances the track’s heavily mechanized aggression.