Face-Eater
From Tardis Wiki, the free Doctor Who reference
The Face-Eater, or F'Seeta was an ancient, intelligent entity.
Biology
The Face-Eater itself was a being that could control several shape-shifting creatures that could telepathically read the memories and emotions of their victims. It could also control the minds of the Proximans. (EDA: The Face-Eater)
History
The Face-Eater was originally a cow-like animal selected for development by the Proximans as an experiment in creating a vast gestalt mind. After experimentation, its true physical form was a vast, leathery monster that absorbed almost all organic matter on Proxima 2. (EDA: The Face-Eater)