One winter, seventy years ago, an uncanny black snowfall descended from the sky. An open black scripture lay in the snow, and the words inside it, including Fury, Gentleness, Good, Evil, Ugliness, Annihilation, Survival, Desire, Endurance, Extremity, and Chaos, transformed into countless black snowflakes and flew out. They burrowed into people’s necks. The blood of those they possessed turned black. Gradually, they gained powerful abilities and physical forms corresponding to the words that possessed them, while their personalities and thoughts changed accordingly. Humanity collectively called them “Forms.” Poison Forms were opposed to Healing Forms; Endurance Forms were opposed to Desire Forms. To survive, each had to abide by its nature: Death Forms had to kill, and Survival Forms had to save. Humanity was inevitably drawn into this war of opposing forces.