Fate/Grand Order: The Heir of Magecraft

The Chaldea Security Organization, an organization dedicated to protecting the safety of the world and protecting humanity from extinction. Izuku Midoriya, a quirkless boy that had no chance to become a hero in the eyes of the world of quirks, but in the world of Magecraft and Magi he had the Magecraft and is a First Rate Magi with the experience of several Holy Grail Wars under his belt and now it's time for him to save humanity from certain extinction.