Dark energy pollutes a Japanese city, turning the spirits of culture-heroes and their legendary magical items into weapons. Only the Holy Grail can reverse the damage.Dark energy pollutes a Japanese city, turning the spirits of culture-heroes and their legendary magical items into weapons. Only the Holy Grail can reverse the damage.Dark energy pollutes a Japanese city, turning the spirits of culture-heroes and their legendary magical items into weapons. Only the Holy Grail can reverse the damage.