A mysterious creature appears, telling the main cast that he is the first of many to follow. Now, Advent beast are appearing, and each has the power to destroy the world ten times over. How can they help these creature's, and cleanse their Evil, when Evil is all they are? Will they be able to make peace with these beasts, or face their pretested end?

(Fgo crossover, because I love the idea of the elements facing the embodiment of Evil's, The Beast's, their opposites. This is my first Fanfic, so I apologize for mistakes in advance. There will be other crossover elements and Their will be more than 7 Beasts.)