The Simargl or Semargl is either a winged dog or a winged lion (usually a dog). It can be any breed of dog and any breed of lion. But most often he takes on a human shape.
The Simargl can fly, and he is quick and agile. He can control all means of fire (as they are the gods of it) and he is strong and smart.
The Simargl is from East Slavic mythology, and is the God of physical fire (unlike Svarog who is God of celestial fire), and is depicted as a winged dog or lion. He is sayed to be the husband of Kupalnica (or Kupalnitsa), goddess of night, from whom he got two children: Kupalo and Kostroma. An idol of the Simargl was presented in the pantheon of Great Prince Vladmir | of Kiev. There are images of Simargls on bracelets from the 12th or 13th century.