scourge_(warrior_cats)
Antagonist of The Prophecies Begin. A former housecat and the half-brother of Firestar (warrior cats), and the runt of his litter. He grows up on the streets, and starts a dangerous group of strays known as BloodClan.
Appears as a black cat wearing a collar adorned with dog's teeth. The color of the collar varies depending on region, but is most commonly depicted as purple. He has a single white paw.