The Lifeslayers are a warband of Chaos Space Marines that splintered from the World Eaters Traitor Legion. Most recently, during the 13th Black Crusade, this warband fought alongside the monstrous Butcherhorde, a conglomeration of multiple World Eaters warbands led by the infamous Khârn the Betrayer, who led them in the slaughter of the Imperial world of Amethal in the Diamor System against the valiant defence of the Blood Angels Space Marine Chapter.
- Diamor Campaign (999.M41) - The Diamor Campaign took place during Abaddon the Despoiler's 13th Black Crusade within the Diamor System. Initially led by the Chaos Lord Kranon the Relentless, his Renegade Chapter, known as the Crimson Slaughter, spearheaded the attack on the Imperial world of Amethal on behalf of Abaddon in order to obtain something the Despoiler desired. Due to the madness and unpredictability of Kranon, the execution of the invasion instead fell upon the Black Legion's Chaos Lord Xorphas. The Lifeslayers warband would later join the monstrous Butcherhorde alliance, comprised of a coalition of multiple World Eaters warbands and led by the infamous Khârn the Betrayer. This Khornate host descended upon Amethal with but a single goal -- to take the heads of the most worthy and mightiest of the heroes of the defending Blood Angels. The resultant slaughter weakened the barrier between the Immaterium and the material realm to such an extent that the Blood Angels were forced to call for aid from the daemon-hunting Grey Knights Chapter.
The Lifeslayers warband wears faded redwood colours with oxblood on parts of their battle-plate trimmed in silver and brass, which denotes their allegiance to the Blood God Khorne. The faded armour plates of the Lifeslayers are a result of the extreme war zones through which they fight -- to test their might against the environments of the very worlds on which they war.
The Lifeslayers warband's icon is reminiscent of their original Legion icon -- a world being devoured by a monstrous black-coloured maw, centred on a field of reddish-orange.
- Black Crusade: Traitor's Hate (7th Edition), pg. 63