The Spiral Sacrifice is the 13th album by Sopor Æternus & the Ensemble of Shadows. The album was released on February 8, 2018 on four different formats: on compact disc format with 128-page hardcover book (limited to 1500 copies); on 3x12" black vinyl with an additional booklet (limited to 500 copies); on two tape versions (Hot Pink and Pale Pink) wax-sealed, signed and hand-packaged by Anna Varney herself; and on a limited Supporter's Box edition including the compact disc version format, 3x12" pink vinyl, an extra 7" vinyl with two chamber music-like dark ambient mixes, a fold-out poster, a hand-numbered certificate of authenticity and a T-shirt . The Supporter's Box was initially intended to be limited to 500 copies, although Anna has since stated on her official Facebook page that only 485 were actually produced.