In Norse creation myths, the source from which the first beings were formed is the primordial realm of Ginnungagap, the yawning void between Muspelheim (fire) and Niflheim (ice). The interaction of these contrasting elements led to the emergence of Ymir, the first being. His body was then used to create the world, symbolizing the cyclical nature of life and death in Norse cosmology. This creation story emphasizes the themes of transformation and the interplay of opposing forces, foundational to the Norse worldview.