With vocals that sound like an evil, croaking frog over a torrent of percussion and an assault of guitars, and with a bass that has dynamics not unlike nests of churning mutant wasps, Immortal helped to define the sound and aesthetics of Norwegian black metal from its earliest days. While perhaps not as influential on the movement as Mayhem or Darkthrone, Immortal embodied the look and attitude of black metal as well as any of the genre's stars. Fusing a core sound with thrash, Immortal's music seemed to branch out a little from the purely abrasive assault and spooky undertones culminating in the 1999 album At the Heart of Winter. If you go to this show, expect to see a band that knows how to be ferociously fun as much as it knows how to look wicked.