Fair warning: Stygian Bough is not here to please you. The singular collaboration between ultra-drone cult heroes Bell Witch and singer-songwriter Erik Moggridge deals in opuses that stretch to 20 minutes, but never lets you doubt their urgency. Here are profound explorations of life, death and purgatory - but all you really have to do is lose yourself and your earthly sense of time and space. A spiritual awakening is waiting on the other side.