Ghost B.C. emerged a few years back with a simple yet evocative stage gimmick (anonymous dudes in robes and a singer outfitted like a satanic pope) and a batch of killer tunes (sleek, sinister hard rock, studded with golden hooks). Infestissumam, the Swedes’ new sophomore effort, is a righteous blast of paranormal prog. Hear for yourself when this weird apparition of a band materializes in Williamsburg. Ohio's Skeletonwitch lays sinister black-metal demonspeak over chugging old-school thrash in support.