Triosphere is a Norwegian heavy metal band from Trondheim, created in 2004 by singer and bassist Ida Haukland, and guitarist Marius Silver Bergesen. They are defined by their heavy metal sound emphasising their power metal-like melodies and choruses, while also featuring progressive elements. Bergesen is the composer of all instrumental parts, with Haukland acting as lyricist, and composer of the vocal parts.

Kamelot is an American power metal band from Tampa, Florida, formed by Thomas Youngblood in 1987. The Norwegian vocalist Roy Khan joined for the album Siége Perilous, and shared songwriting credit with Youngblood until his departure in April 2011. On June 22, 2012, Youngblood announced on their website that their new vocalist would be the Swedish singer Tommy Karevik, who was first featured on Kamelot's album Silverthorn as the main vocalist, co-songwriter, and lyricist.