Krafayis
The Krafayis were a species of space-faring omnivorous predators.
Biology
The Krafayis were large creatures that had traits of both reptiles and birds. They had parrot-like beaks, quill horns, two wattles on the sides of their heads, long necks and quills down their tail.
They were generally invisible which was the perfect defense. They could only be seen by people who had unique perceptions of the world or a reflection in a mirror or water.
The Krafayis were capable of traveling through the universe, moving from planet to planet to hunt. Preferring planets with oxygen/nitrogen atmospheres, they hunted in packs and would eventually leave the planet, leaving behind the weaker members of their pack.
Appearances
Vincent and the Doctor (TV)
Blind Fury (Prose)