Formed on Moraz III, a death world swathed in carnivorous jungle flora, the Cult's infestation began when the planet was struck by the wreckage of a Rogue Trader’s ship. The Genestealer that broke free from the ship’s hold infects the local populace, giving rise to the nascent Cult Veridian. However, every member of the dynasty was killed when a regiment of Catachan Jungle Fighters which uses Moraz III as a training world for their hunt-and-slay tactics discovered the infiltration. Only the Genestealers themselves escape. Once the Catachans have left the planet, the xenos emerge once more, swiftly becoming the alpha predator of the jungle and reclaiming Moraz III for themselves.