And yet it was pervasive. It was attached to almost every solid and liquid molecule on Lilith, organic and inorganic, almost as a component of the molecular structure itself. It was not sentient—nothing that small and that elementary could be—but it was omnipresent and it knew what it wanted. It didn’t like molecules that didn’t have it inside, and it did a very nice job of dissolving almost everything alien to Lilith, leaving all the equipment, even the clothes on the scientists’ backs, as so much fine powder. Lilith’s little beast could not cope with any synthetic compounds, and almost everything the Exploiter Teams used or wore was in fact synthetic. The scientists themselves, and some of their plants, were non-synthetic carbon-based organic stuff, and the Warden organism could cope with that. It quickly invaded every cell and set up housekeeping, modifying each cell to suit itself in a nicely symbiotic relationship. This was scant comfort to sixty-two stunned, stark-naked scientists that they never again had to worry about colds and that even minor wounds would heal themselves.

Thanks to the expeditionary bases on the other three worlds, the Warden organism, it was theorized, had been carried there by the first to settle. Of course, the three other planets were quite different from Lilith—different gravities, different levels of radiation, different atmospheric balances. The Warden organism could not adapt those whole worlds to its Lilith standard, but the submicroscopic creature had a hell of a survival instinct. On Medusa, for example, it adapted the host organism—the people, and, quickly, the plants and animals—so as to ensure their, and its, survival. On Cerberus and Charon it struck a balance in the hosts that was to its liking, but which produced by-products of physical change not relevant to it but rather resulting from that balance it found most comfortable. This produced strange by-products in the humans so infected.