There is more than one artist with this name:
These are videos from concerts where Grendel played, so they may be of other bands that played the concert as well.
Geistform / T3RR0R 3RR0R / Klangstabil / Grendel / Spiritual Front / Front 242 DJ Set Oct 31, 2014 L'Hospitalet de Llobregat, Catalonia, Spain Added by Sssinistre
XIII. Wave-Gotik-Treffen May 28 - 31, 2004 Leipzig, Saxony, Germany Added by John Collins
X. Wave-Gotik-Treffen Jun 1 - 4, 2001 Leipzig, Saxony, Germany Added by John Collins