Knight of Futures Past

With this catalyst, she will obtain the greatest Sabre possible. She was sure of it, after all… "This tapestry was wrapped around his bow by King Arthur himself in preparation for the funeral." What makes for a better catalyst than his burial shroud? A one-shot of a fun idea of a time-travel fic- Rin summons a hero who is a future version of Shirou who traveled back in time.