Elder Evil
Godeaters are Cardinal beings from beyond the Veil. They are capable of devouring Animus, and act animalistically in their hunger for it, in a way that is impossible for any mortal mind to fully comprehend.
The only time a godeater was able to get inside the Veil and into Eternus was during the Rending, when the Veil was split open, allowing it to move through. The godeater chose three avatars, being the three people with the most Cardinal surrounding them, which was Týr Sara, Tasha, and Xenevieve Sara.