Headless Mule

The Headless Mule is a mythical character in Brazilian folklore. In most tales, it is the ghost of a woman that has been cursed by God for her sins (often said to be as concubine to or fornication with a priest within a church) and condemned to turn into a fire-spewing headless mule, galloping through the countryside from Thursday's sundown to Friday's sunrise. The myth has several variations concerning the sin that turned the cursed woman into the monster: necrophagy, infanticide, sacrilege against the church, fornication, etc.

The orignal concept was created by Israel Botelho, you can check more of his work here:
https://www.instagram.com/p/Ced2qLDrkZR/