Serpent's Fang

As well as countless tribes of Orcs & Goblins, the Badlands have long been home to an assortment of outcasts, criminals and other ne'er do wells. In the dark ruins that litter the landscape, cultists often gather far from the prying eyes of the authorities, practicing their sinister rituals until inevitable betrayal becomes their undoing. The Serpent's Fang was once home to just such a cult, the Cult of the Crimson Serpent, a group of Slaaneshi worshippers who briefly wreaked havoc upon surrounding settlements until a group of itinerant warriors slew them.

Source
pg. 10
 * Blood in the Badlands (supplement)