The Foreign Sorcerer

After the Great Of Fuyuki City cause by the previous Holy Grail World, A secret organization In the U.S that has been watching the Grail Wars over the years has had enough and decided to act. And years later when the 5th Grail War was about to start they sent their agent with his servents to take part and stop another disaster from happening again

His Name Ren, The Foreign Sorcerer

(Warning this is a fanfiction and it takes place in its own sperate universe)