The Phyrr Cat is the apex predator of the plains and forests of lethal and deadly harvest-world of Phyrr, located deep within the Hazeroth Abyss in the Calixis Sector. These felids grow rather large, some of the oldest reaching the size of a small pony. They are completely carnivorous, but also very reclusive. A Phyrr Cat’s prowess in stealth is so phenomenal that someone travelling through Phyrr’s forests could pass within four metres of one and never know it was there.
That is not to say Phyrr Cats will not stalk and kill a man if given the opportunity. The Imperial penal harvest teams stationed on Phyrr live in terror of the creatures. They are doubly dangerous -- if their teeth and claws do not kill a person outright, the unfortunate is still doomed. Like every other plant and animal on Phyrr, the Phyrr Cat is toxic to human life. If that were not enough, there is some evidence to suggest that Phyrr Cats have some sort of ingrained psychic ability, allowing them to hunt without using their more mundane senses. Certainly, in several cases the cats have savagely attacked psykers who strayed too close to them.
Although the Phyrr Cat is toxic to humans, the reverse is not true. Some ambitious Rogue Traders travel to Phyrr to capture the creatures to sell to noble game preserves and mid–hive carnivora. The reward is often worth the cost in men the planet inevitably extracts. For those interested in such pursuits, little rivals the sight of a Phyrr Cat on the hunt.
- Dark Herersy: Creature Anathema (RPG), pg. 42