The sacred tree Yggdrasil in Norse cosmology represents the interconnectedness of all worlds: Asgard, Midgard, and Hel. As a gigantic ash tree, it is often depicted as the axis mundi, symbolizing the union of the cosmic realms. Yggdrasil holds significance not only as a source of life and nourishment but also as a site of conflict and transformation, where gods and other beings interact. Its roots and branches illustrate the cyclical nature of existence, connecting beings across different dimensions of reality.