Banaspati the Indonesian powerful fire spirit

Banaspati is the name of a spirit from an old legend or folklore in Indonesia culture. It is said to have two forms: A fireball floating between big trees in the middle of the wood and human form engulfed in blazing flame. It's original size is only the size of an adult hand when gripped but will grow larger and prey on a terrified victim, burning them to ash on contact. In human form, it moved by walking using both of its hands while its feet are positioned upward. It will chase and extends its flametongue on its prey, setting the poor soul on fire