The Paracytill or Parasitici Dilivanus or simply The Parasite, is a parasitic organism that consumes living matter and life across numerous universes. Discovered in the Sailinus I Universe, they quickly took control of a galaxy and spiraled outward. They are currently engaged in a multiuniversal war with the Arkhangelsk Empire. The Paracytill are thought to be mentioned in many texts such as the Precursor, and the Architects. They are believed to have been created by another species, but others theorize that they are the next step to evolution.

The Paracytill have somehow obtained the ability to travel from universe to universe, and have consumed numerous universes. The Arkhangelsk Empire currently hunts down and destroys any Paracytill found in any Universe.