>>9375872The basic outline is that there is a "Code" that was supposed to have been written by God or is God itself, it's a code that leaned tells, contains all the events in the universe that has happened and ever will happen. The legend continues, saying that a "Host" was given this book to shape the world that the story takes place in. Under mysterious circumstances, it was broken up and it's pieces scattered across the world itself. Whether these pieces are pages of a book or even parts of a human being or an animal, it is said that even these hold incredible amounts of power, able to shape and create realities according to the user's will. "Hosts" were able to manipulate these pieces and use them to wage war and conquer lands for themselves. Eventually their descendants and heirs lost the powers to use the Pieces and eventually they were lost in history. The realities generated by these Pieces and the Hosts generated a certain type of energy when warriors battles inside them. With the right host, enough pieces, and the right warriors, it is said that they will be able to use the Energy of the Arenas to create a doorway to meet the one who wrote the First Code, the host will then be able to configure the First Code to change reality to his liking.
Recently there have been rumors that the Hosts have returned, the pieces have been found, and arenas appearing and disappearing in remote parts of the world. Warriors hearing of these rumors seek them far and wide to take part in their battles and hopefully prove themselves worthy so they may be selected to invoke the First Code and have a hand in rewriting history or the universe itself. However, there are many who are against the Hosts and the use of Arenas and the Code, believing it's best that they stay a legend and not let the power of the First Code fall into the hands of mere mortals.
That's the basic lore and story.