Cerebravore
Cerebravores were a predatorial species wich was create by experiments made in Pranavores, by a species known as the Fleshkind, they fed of negative human emotions, and were harmless beings and naked to the human eye, as the Pranavores, as they lived on the Psychosphere, a Earth's psychic dimension. They predated people with negative emotion fields, possesing them and creating a psychic proyection of the person's fear. Eventually the host died and the cerebravore searched another.
The Fleshkind experimented with some Pranavores on search of create a psychic weapon, separating them of they hive mind. Without it, they mutated and became into Cerebravores, attacking and killing all of them, eventually finding the way to break out the Psychosphere. They escaped via a portal located in a laundry, starting an invasion across New York. One of then attacked to Gaby Gonzalez, but was rescued by the Tenth Doctor. aftermath he found a way to defeat them, with the Gaby's help ( "Revolutions of Terror (comic story)").
