There have been moments in the timeline of music genres when a transision occurs. Where a work of art that is made for specific music taste goes further and beyond these closed taste borders, reaching ears of different aesthetic, becoming more of an ecumenical type of work. We have seen it happen in rock and hard rock albums but If someone ever asked me whether a transision like that could be made by a black metal album, my strongest argument in favor of such statement would have been Z&A <3