Ordo Ad Chao is the fourth full-length album by Mayhem.It is the first Mayhem album to feature vocalist Attila Csihar since the 1994 release, De Mysteriis Dom Sathanas. Jan Axel Blomberg (Hellhammer) stated on his official forum that the drum tracks were not equalized and only the bass drums were triggered. He finished saying "the production sounds necro as fuck, but that's the way we wanted it this time. It represents Mayhem today." And indeed, the sound of the album is far rawer than that of any official Mayhem studio release since Deathcrush, with a very bass-heavy mix. Despite that, the album continues the somewhat unorthodox songwriting approach showcased on the band's last two releases, with "Illuminate Eliminate" being the band's second longest song ever. The album features some death grunts and clean vocals. The album was released to the world on April 23, 2007 and to North America a day later. The album charted at #12 in Norway, making it the band's highest charting album yet. There is a limited edition version of the album that comes in a metal case that is limited to a production of 3000. As stated by Blasphemer in an interview with Inferno Magazine, Necrobutcher did not play the bass guitar on the album, despite being credited in the booklet.
Lyric:
Spawn of Annunaki, crossbreed make war
Make war with the universe death of the planet
Fall of an aeon
The great work of ages
The acid of sorcery
Deluded versions of revelations
The symbols repulse
Whatever done equals zero
Times nothing
Completing the control of emptiness
Enter the external lights
The conversed tubes to the surface and beyond
Detraction of outer space
Nemesis of genesis
