Codex: Genestealer Cults (2016), p41 — The Hidden Dynasties

Infestation and Plague

The Cult Tenebrous finds itself becoming the infested, rather than the infesters, when their bulk lander is swallowed by a Warp storm that strands them on the outskirts of Nurgle's Garden. The cult discovers the true meaning of parasitism and horror. Eventually, the Grandfather of Plagues allows them to emerge into realspace once more, horrifically changed and ready to serve their new master's sickly agendas.