Once upon a time it was an ordinary person who became interested in dark magic. He began to study curses and eventually became a master of curses. His appearance has changed from constant interaction with dark magic and from experiments on himself. He wanted to test his knowledge on someone and realized that it would be easier in the forest, because people can just disappear there and no one will think that something supernatural can live there. So he started killing or cursing everyone he met on the way. Curses eventually turn people into evil creatures.