I see non of you have heard of Amon Amarth! Seriously, check them out if you like any kind of metal. They're one of (if not the) heaviest bands I've ever heard, along with some of the most inspiring riffs I've ever heard. They're a Swedish death metal band. IMO, "Vs. The World" is their best album. "thousand years oppression" and "across the rain bridge" my favorite songs. It's usually themed around Viking conquest and gods and the such, makes you feel very powerfull.