In 2100, a blood-red full moon hung high in the sky. The event would go down in history as the “Blood Moon Arrival.” This sudden upheaval of heaven and earth shattered the peace of human civilization: animals across the globe underwent terrifying mutations, becoming enormous, bloodthirsty monsters that surged like a tide toward human settlements. Skyscrapers collapsed, the earth split apart, and once-prosperous cities became hunting grounds for monsters. Human civilization teetered on the brink of annihilation.
In the face of this unprecedented crisis, humanity awakened the power to summon demonic cards, long dormant in their bloodlines. People could seal the power of slain monsters into cards and summon their spectral forms to fight alongside them. By fusing and evolving cards, they could unlock even stronger summoned forms. With this power, humanity rallied its survivors and established heavily fortified bases across the shattered continent. Using their flesh and blood and the power of demonic cards as a shield, they barely managed to defend the territories they depended on for survival, kindling the flames of resistance in the narrow space between hope and despair.