Through the use of a tube-like tongue called an
Ovipositor known informally as the
Genestealer's Kiss[10a], they insert a tiny embryonic organism containing their own genetic material into a host victim. Over time this organism alters the host's genetic code, and their consciousness is also completely suppressed by a localised version of the Hive Mind, known as the
Brood Mind, becoming a virtual slave. Any offspring born by the host will be horrific
Genestealer Hybrids, which the host will be psychically mesmerised to care for, giving rise to the
Genestealer Cults that grow in secret within human and other societies.