Opeth Blackwater Park: 20th Anniversary White Black Vinyl emo an epic four chord lullaby in GMG 6064 an epic four chord lullaby in which Batz's voice buzzes like a water logged robot or better yet a young woman's extracted fetus is flushed into the sewer system wherein it's exposed to toxic waste and begins to mutate into an ever growing and increasingly bloodthirsty monster It is also arguably still the most cherished album in the Swedish metallers illustrious catalogue as a rising progressive influence kicked open prog’s ornate doors fed death metal through the cosmic kaleidoscope and introduced a generation of music nerds to a world of limitless musical possibilities