Dimmu Borgir's eighth studio album, "In Sorte Diaboli", was released on 24 April 2007. A special edition version was released in a boxed case with a DVD, backward-printed lyrics, and a mirror. The album artwork was released on 14 February 2007 on a promotional webpage for the album. This album features once more the drumming of Hellhammer of Mayhem. Blomberg left the band in mid-tour in 2007 because of a neck injury that resulted in limited movement of his right arm. With the release of this album, Dimmu Borgir became the first black metal band with a number one album on the charts in their native country. In October 2008, they released their second live DVD set titled The Invaluable Darkness, which was based on several shows during the world tour supporting 'In Sorte Diaboli'.