Proto-Indo-European mythology realm of Midgard. Other dragon-slaying myths are also found in the Germanic tradition. In the "Völsunga saga", Sigurd slays the dragon Fafnir and, in "Beowulf", the eponymous hero slays a different dragon. Reflexes of the Proto-Indo-European dragon-slaying myth are found throughout other branches of the language family as well. In Zoroastrianism and Persian mythology, Fereydun, and later Garshasp, slays Zahhak. In Slavic mythology, Perun, the god of storms, slays Veles and Dobrynya Nikitich slays the three-headed dragon Zmey. In Armenian mythology, the god Vahagn slays the dragon Vishap. In Romanian folklore, Făt-Frumos slays the fire-spitting monster Zmeu. In Celtic mythology,
Investigations into Germanic Mythology swam against the stream, but he clearly expressed that which has become an ever stronger certainty today: a large part of the myths of the Germanic tradition —and that is to say basically the Old Norse tradition—must be set back in a time when the undivided Proto-Indo-European people themselves created the vessel of their worldview in myths. There is no shortage of scholarly opinion and no consensus on Viktor Rydberg's works on Indo-European and Germanic mythology. Some scholars feel that his work is ingenious, while others feel the work is too speculative. One scholar expressed the opinion that "Rydberg's views"