The Collectors - Infiltrator Unit

There's little known about the collectors. They come with their ships, sometimes spreading prophecies harmlessly through the folk like some sect. Sometimes they come in larger numbers and start to take over whole planets. Sometimes they cleanse them without a trace of breathing life left on it.
 It is only clear that they are collecting life forms and taking them with their large carrier ships deep into the voids of space. It is told that they are enslaving them to construct something, a ship, a weapon, a planet, bigger than everything we have stored in our archives.

We can only hope that none of their infiltrator units are already scouting our very planet... for it could be the last years we have the blessing to be uninitiated in their dark secrets.