Grendel has seen 75 bands.

Band Concerts Seen
  Slayer 3 concerts
  Soundgarden 3 concerts
  Testament 3 concerts
  Iron Maiden 2 concerts
  MX Machine 2 concerts
  Sepultura 2 concerts
  The Mars Volta 2 concerts
  Voivod 2 concerts
  AC/DC 1 concert
  Adolescents 1 concert
  Anthrax 1 concert
  Apartment 26 1 concert
  Art of Shock 1 concert
  BASSNECTAR 1 concert
  Behemoth 1 concert
  Biohazard 1 concert
  Black Label Society 1 concert
  Blessed Curse 1 concert
  Chains of Belmont 1 concert
  Coheed and Cambria 1 concert
  Combichrist 1 concert
  Corrosion Of Conformity 1 concert
  Cowboy Junkies 1 concert
  Crowbar 1 concert
  Danzig 1 concert