From the introduction:
Hail, Jumper! You have reached the continent of Elibe, where dragons and humans once waged a great war, called the Scouring. Dragons were a challenge to destroy, and so the humans forged eight mighty weapons to kill the dragons. These weapons were so powerful, the magical laws of the universe were shattered for a long time. In the Ending Winter, no magic worked as the magic begun to leak out of the universe. The laws of nature collapsed, as summer turned into winter and stars twinkled during the day. Things seemed desolate and hopeless. But like all wounds, it healed. As with the case with bad wounds though, a noticeable scar lay on the world. Magic and the weapons themselves were weaker, and not even the dragons could maintain their once powerful forms. They exchanged their mighty dragon forms for weaker human forms. They stored their remaining energy in dragon stones which they used to shift back to their true dragon forms should they need it. Most dragons left Elibe through the various hidden dragon gates around Elibe, one of which is on the island of Valor.