As the only named magitech weapon in Tales of Phantasia, it is the result of magic research in Midgards during the past era, developed by its scientists for military purposes. During the original iteration of the Valhalla War against Dhaos, Midgards manages to fire two shots against the invading forces, fully depleting mana on Aselia and killing the Great Tree Yggdrasill. This results in the death of all Spirits and their associated magic, and eventually Dhaos's defeat as he escapes into the future, finding himself caught in a trap and sealed ten years before the start of the story.