After defeating the Fuyuki singularity, in preparation for their next rayshift, a summoning that should be routine breaks from a glitch within the system. Now warriors from a different history arrive, can they aid against the incineration of humanity?

Just a challenge idea that couldn't leave my head. I welcome anybody to try it and wish them the best of luck. Guidelines are in the story itself, the the gist of it is to make an fate stay night crossover with Kassandra from Assassins creed Odyssey as a heroic spirit. I do not own either of the respective franchises, those rights belong solely to their creators and publishers.

A world where it is eight years after the Fifth Holy Grail War, a parallel universe where Rin could not save Shinji and the Holy Grail was not completely destroyed. A parallel universe seeped in to fill the gap that was left by this time anominal.

On the morning of his seventeenth birthday, Michael Williams discovers something that will change his life forever. Will he survive what's been planned for him, or will he be killed in the stories he's come to love?

Everything needs a ruler...

A clash between seven mages. A secret war between two ancient conspiracies. A boy with memories not of his own. Welcome to Fuyuki City, where nothing is true and everything is permitted.