Enslavers

The Enslavers, also known as Psyrens, Krell, Dominators or Puppeteers in different parts of the galaxy, are an intelligent race of other-dimensional psychic entities native to the realm of the Immaterium similar in appearance to hybrids of Terran cnidarians (jellyfish) and Terran arachnids. Enslavers will mind control any unprotected psychic being that they can in order to turn them into living Warp portals that more Enslavers can enter the material universe through. This control appears to be psychic in nature.