In Norse mythology, Fenrir plays a significant role in the events leading up to Ragnarok, the end of the world. This monstrous wolf is prophesied to break free from his bindings and cause great destruction during the cataclysmic battle between the gods and their enemies. Fenrir embodies the inevitability of fate and the chaos that accompanies the end of an era. His story highlights themes of destruction and transformation in the cyclical nature of existence, echoing the broader themes present in Norse lore.