The Jersey Devil is a creature that lives in New Jersey, U.S.A. It is a Class 5 creature.
Mother Leeds was a witch that had gone bad when she fell in love with the Devil. Many people knew that she was a witch and that he was the Devil and everybody knew what would happen if they had a thirteenth child. Years before an old prophet said that when the Devil had a thirteenth child, it would be a horrible creature like nothing mankind has ever seen before.
In 1735, Mother Leeds was in labor for her thirteenth time on a stormy night. All her evil friends were gathered around her. To everyone's surprise, the child was born normal but several minutes after being born it morphed into a creature with the head of a horse, hooves, bad wings, and a forked tail. It killed Mother Leeds' midwife and flew up the chimney. It is rumored to still be in New Jersey to this day.