Asriel is a world full of magic, and the magical energy is called "the radiance of source matter". Once upon a time, the bright magical order was maintained by the ancient "Holy Council", and magicians followed the ancient star trails and elemental rhythms to exert their power. However, decades ago, a catastrophe known as the "Starfall Catastrophe" struck. Powerful dark magic tore apart the sky and obscured some stars, causing the source of light to become chaotic and full of dangerous "eclipse" pollution. The world structure is shattered, the power of light is declining, and dark creatures and forces mastering forbidden necrotic magic are rising. The ancient magic books were scattered and destroyed in the disaster, and only fragments of the most critical "Creation Book" remained. In this era of intertwined light and darkness, and the collapse of order, finding the remaining pages of the holy book, purifying the darkness, and rebuilding the order of light have become the goals of countless people.
