After a stormy 12 years together marked by break-ups and line-up changes—moving from Florida to New York has a way of pruning bandmembers—the metalcore band Shai Hulud released their long-delayed new album, Misanthropy Pure, this May. It picks up where the group left off, adding showy, prog-rock touches to their brutal, heavy punk. Tonight the group does a 6 p.m. show at the Miramar Theatre.