A metaphysical location, the “force” that exists at the top of all theories on dimensions. It is the location of the Akashic Records, the Swirl of the Root, which is the source of all events and phenomena in the universe. Existing outside of time, it stores and archives information of all possibilities and events, past, present, and future, of the world. It is the place from where all souls, including those of Heroic Spirits recorded on the Throne of Heroes, originate from and to where they return after death.
The ultimate goal of Magi is to reach the Root, and many focus their experiments on discovering a path to it. The First Magic and Fifth Magic were the result of reaching the path without entering, while the Second, Third, and Fourth Magics were meant as a means to reach it. There are various methods used in attempts to reach it, usually involving reaching the pinnacle of a certain concept. There are also methods meant to reach it through manipulating certain systems, such as the Holy Grail War using Heroic Spirits returning to the Grail as a way of making a hole to it. Once a route is used, it is closed for good upon becoming established. If one isn’t entered, it can be left until someone does claim it, thus closing it off for good.