At the intersection of death metal, grandiose songwriting, and Norse warfare and Viking mythology is Sweden's Amon Amarth. If anything, the name — meaning "Mount Doom" in one of the fictional languages used in J.R.R. Tolkien's canon — should tell you where the band is coming from thematically. The brutal riffs, precise chugging drums, and the deep, dark growls of front man Johan Hegg have made Amon Amarth an unmoving pillar in metal for more than 20 years. The band's latest release, "Jomsviking," is its first concept album — "The first man I killed was the earl's right-hand man" is the album's first line, so you know it's not a happy story — and just came out in March.