Boiuna

Boiuna or Mboi-Una (black snake in Tupi language) is a Brazilian myth of indigenous origin.

Legend
Boiuna is a gigantic snake that inhabits the mighty rivers of the Amazon. Because Boiúna is linked to the creation of the world, it can change the course of the waters and give rise to many animals. It is described as a black snake capable of capsizing vessels. It can also imitate the shapes of boats, attracting castaways to the bottom of the river or taking the form of a woman.

The most common story behind this menacing character is about a native girl from an Amazonian tribe who became pregnant with the Boiuna snake. She gave birth to twin children who were born looking like snakes. The boy received the name of Honorato, and the girl, Maria Caninana. Frightened by the appearance of her children, she decided to throw her "snake children" into the river.

The difference between the personality of the brothers was notorious. That is, while Honorato had a good heart and always visited his mother, Maria, in turn, held a grudge and never went to visit her. Because of her temperament, Maria was always scaring the population and animals, or even sinking ships. Her brother, who was the opposite, didn't like her actions at all.

So, tired and saddened by his sister's actions, Honorato decides to kill her to put an end to the suffering of many people.