Alchemy Gothic Yggdrsil Viking World Tree Pendant P994A powerful amulet that is a source of all life and knowledge. Yggdrasil, meaning 'Odin's Gallows' a reference to Odin's self sacrifice by hanging himself from the tree for nine days to gain knowledge of the runes. The mighty Ash tree, whose trunk rises through the center of the Norse cosmos, anchors the nine realms, which include Asgard, Midgard and Hel. When the tree trembles, it signals the arrival of Ragnarok and the destruction of the universe.