The upcoming album features among others; Snowy Shaw (King Diamond, Mercyful Fate, Notre Dame, Therion, Dimmu Borgir), Mats Levén (Krux, Therion), Niklas Isfeldt (Dream Evil), Jake E (Amaranthe, Dreamland) and Camilla Alisander-Ason on vocals, daemonic voices and ghoulish sounds. Snowy Shaw has also contributed with his well-known drums of doom. The album is produced and mixed by Andy LaRocque (King Diamond) at his Sonic Train Studio

OPERA DIABOLICUS is the brainchild of composer David Grimoire and lyricist Adrian de Crow. The idea sprung to life when the two of them met randomly at a stage play of Umberto Eco's book The Name of the Rose at a theatre in Gothenburg the year 2006. Both of them were very intrigued by the story and they ended up talking about how interesting it would be to make a theatrical and dark metal musical based on that kind of a story. The conversation between them that took place in Gothenburg that bleak December night planted the seed that soon should grow to be the concept of OPERA DIABOLICUS - The concept of combining the dark elements of music and theatre in alliance with musical excellency.