Semargl – Slavic god of fire and the original fertility has the ability to combine and multiply the strength of all Svarozych. In one version it is the first senior son of Svarog, born from the blow of the hammer on the heavenly anvil of Svarog. According to another version Semargl is the second son of the god after “Svarog” blacksmith. However, almost all scholars of ancient Slavic culture converge on the fact that Semargl was born much before Perun and Veles as they belong to the second generation of gods, that our ancestors called “sons of gods”. With Semargl linked to many legends that tell about how he has repeatedly helped to a particular god (Svarog and Perun) in the battle with the forces of darkness.
For a long time (before the birth of Perun) Semargl acted as the main defender of the rights, also this is nothing weird because Semargl got involved in Slavic mythology due to Sarmatian proto-Iranic and indo-European myths.
This is likely to valor he was not inferior to Perun. However, unlike other gods Semargl had two distinctive features. He, at first, often acted as a messenger of the gods, conveying to the world Yav particular information. Secondly, Semargl had a unique ability to concentrate in himself the power of the gods. If Semargl appeared on the battlefield, the power of the Gods would have increased and they would won the conflict. Semargl together with Svarog was involved in primordial battle of light versus darkness that once plagued the Slavic world, clearly separated by Yav and Nav. According to some legends, with these gods in a battle some other gods participated such as Stribog, and Dazhdbog. Semargl often was seen also as Svarozhich (that is, the son of Svarog) so old pagan Slavs worshiped him along with Perun and Veles. However these myths vary as Slavs began scattering the land they over time had different views on mythology and how it developed further.
Often in medieval chronicles (eg “Slavic chronicles” Slavorum) there was mention of the fact that the idol Semargl is always placed at the right hand of the idol of Perun. Due to this fact and taking into account the set of martial folk scenes in which Semargl involved in legends, it is logical to assume that this is also considered as the patron god of battles and warriors. In addition, Semargl was revered as the god of the moon and fire. There is evidence that Semargl could change its appearance. Sometimes he appeared before the people in the form of a young (or elderly) warrior, with fringed tongues of pure flame around him. But more often Semargl has been seen in the guise of a large winged dog, followed by a fiery trail remained. This image of Semargl, as a dog is considered the most accurate.