To assail an infestation of the Cult Hydraic is to attack a single tendril of a far greater organism. For hundreds of Terran years this organisation has sent broods of Purestrain Genestealers from the orbital dockyards of Vigilance Quadrex. Though many have been subsequently destroyed, many more have started the Cult Hydraic anew, their colours flown on a dozen Imperial worlds across the Segmentum Pacificus.
To attack one such node is to invite slow but certain retribution. With news of the hostile act transmitted psychically through the Broodmind by the cult's war leaders, it is only a matter of time before several more elements of the organisation converge on the aggressor -- and either eradicate them entirely, or use sinister charisma to convert them to the cult's cause.
- Codex: Genestealer Cults (8th Edition), pg. 33
- Codex: Genestealer Cults (7th Edition), pg. 51