The Enslavers are entities that inhabit the Immaterium and are capable of taking control of the mind of a psychic individual in the physical universe. They are also known as Psyrens, Krell, Dominators or Puppeteers. Enslavers drift with the currents of the Immaterium, and are drawn to the psychic emanations of other creatures who remain in realspace. Once a suitable psyker host is located, the Enslavers form a parasitic mental bond, which over the course of a few days will turn the unfortunate, mind-controlled host into a living Warp portal, so that more Enslavers can enter the material universe and find new hosts. The Enslavers had their most profound impact on the galaxy in a catastrophic event known as the Enslaver Plague that occurred some 60 million standard years before the present.