Heavy Metal EXUMER To Co-Headline Bulgaria’s THRASH ATTACK Festival February 9, 2010 Atomm Leave a comment German thrashers EXUMER will co-headline the Thrash Attack festival in Sofia, Bulgaria on April 1, 2010 with L.A.Source German thrashers EXUMER will co-headline the Thrash Attack festival in Sofia, Bulgaria on April 1, 2010 with L.A.Source