Codex: Chaos Space Marines (2012), p42 — Obliterators

Though cadres of the mysterious Obliterators are thankfully rare, they have an alarming tendency to suddenly appear wherever the fighting is thickest, manifesting in a storm of light before laying waste to their foes. The Imperium of Man has obtained grainy footage of an Obliterator cult in action, and several theories have emerged about them as a result. Some members of the Inquisition believe they are the by-product of a heretical Dark Mechanicum quest to embody the Omnissiah, whilst others proffer the notion that Obliterators are infected with some kind of Daemon-created 'technovirus'. Opponents of the latter theory say that a technovirus could not exist in the way it is claimed, and that simple daemonic possession gives Obliterators their frighteningly powerful abilities. Only the truly learned realise that the term technovirus is just a misnomer; it is Chaos itself that mutates and corrupts the machine, just as it moulds and changes the flesh of men.