Porewit is a West Slavic deity in Wendish mythology. He was the second god revered in Chareneza with Rugiewit and Porenut. Porewit has been depicted with five heads and no arms.
The Fōbi is a fictional spirit of Yugoslavia. It is a beast with seven heads that blows billowing flame from its necks. In 1960, it burned a police officer and his family to death when he tried to stop it.
It has no basis in real-life mythology, and was instead created for Toshiya Nakaoka's 1968 book "Witchcraft of the World" (世界の魔術・妖術). It was eventually incorporated into other Japanese books on world mythology under the mistaken perception that it was a real European folk story.
"A beast that breathes fire, causing havoc in towns and in the mountains. Fires with unknown causes are said to be this creature's work. When fires occur out of nowhere today, they are written off as spontaneous combustions, but in older times they were said to be caused by the anger of the Porewit. Whenever a fire like that occurred, the people would immediately go to Porewit's altar and sacrifice cows and sheep. They must never laugh about it, for if they did, the fire would spread to their houses as well. "