Legacy of Epica

After Forever was a Dutch symphonic metal band with strong progressive metal influences. Originally formed as a death metal band in 1995 by Mark Jansen and Sander Gommans under the name Apocalypse, they later shifted their sound towards symphonic metal with the introduction of Floor Jansen to the band.

Delain is a Dutch symphonic metal band formed in 2002 by keyboardist Martijn Westerholt. After his departure from Within Temptation in 2001, Westerholt formed Delain the following year, intending for the band to be solely a project, but stopped after the release of one demo. In 2005, Westerholt restarted Delain alongside singer Charlotte Wessels, and released the debut studio album, Lucidity, in September 2006. The band began to perform publicly following the positive reception the album received.

Nightwish is a Finnish symphonic metal band from Kitee. The band was formed in 1996 by keyboardist Tuomas Holopainen, guitarist Emppu Vuorinen, and former lead vocalist Tarja Turunen. The lineup grew with drummer Jukka Nevalainen and bassist Sami Vänskä. In 2001, Vänskä was replaced by Marko Hietala, who also took over the male vocalist role previously filled by Holopainen or guest singers. Nightwish has been successful in Finland since the release of their debut album, Angels Fall First (1997), and were later recognized internationally through the release of their albums Oceanborn (1998), Wishmaster (2000) and Century Child (2002).

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.

Mercenary is a Danish melodic death metal band that was formed in 1991. The band incorporates a lot of power and progressive elements in their songwriting.