There is word of an ancient, cursed spirit, who seeks out those who posses so much malice and hatred for other beings, and possesses them. They are marked with a skull visage, and given supreme power to do with as they please. It feeds on the torture and sadistic glee of its host, making a somewhat... symbiotic relationship. Very few individuals are capable of holding such hatred and evil within them to be called by the spirit, but when that spirit is called, it must answer.
However... The spirit has no control over its host though. In exchange for being able to revel in destruction, it can only sit and watch. If you haven't guessed yet... that's what has occurred here. This Bovine is full of hate. Nobody knows why, it is just an evil, hateful cow, so hateful that its hatred called to this spirit. This spirit does not speak cow, and the cow has no idea how to be anything other than a cow... and now, the spirit is bound to it, unable to leave until the cow is slain. With any luck, the lack of ability to feed will starve the spirit of all of its psychic energy binding it to this plane of existence, and it will move on.
