The Nightkillers are a warband of Chaos Space Marines of unknown origin. Their allegiances are to Chaos Undivided. The current disposition and composition of this warband is unknown to Imperial records.
The Nightkillers wear dark blue-coloured Power Armour with some bronze colouring on the helm, lower arms and legs. The trim and backpack are gold.
The Nightkillers' warband badge is a stylized white skull on a dark blue background, with blue flames coming out of its eyes.
- White Dwarf 333 (UK), pg. 28