In February 2006, after two years, Dagoba released "What Hell Is About", produced by Tue Madsen. Very different from the last album, "What Hell Is About" was radically more somber, with a more gothic sound. Simen Hestnæs formerly of Dimmu Borgir, Borknagar, and Arcturus performed guest vocals on two songs. After the release of the album, Dagoba went on tour in Europe, opening for the likes of Machine Head, Metallica and completed a continental tour with In Flames and Sepultura. They also attended Summerbreeze 2007 and With Full Force 2007.