A strange animal that hatches from the egg of fertilizied by a rooster between the ages of 9 to 12 years. It appears to be a black or white cock indoors, but a large black cat outside.

An aitvaras is a thief, stealing from those it meets, but also a well of both good & bad luck. If an aitvaras gets inside your home & manages to get behind your stove or heater, it will make a nest & be unmovable without something powerful to compel it. if it is compelled to leave, however, all that it has stolen will be left behind.

Some purchase aitvaras from demons, in exchange for their souls, allowing them control over the animals.