Fate/Apocrypha

The world of this story is a parallel version of another where the Greater Grail was taken from Fuyuki after a previous war and vanished for years. In the 2000s, a group called Yggdmillennia, who had stolen the Grail, announce their break from the Mage's Association and claim ownership of it. The Association sends fifty magi to recover it, but nearly all are killed by Lancer of Black. One survivor triggers the Grail's backup system, enabling the summoning of fourteen Servants. This initiates a large-scale Holy Grail War in Trifas, divided into two sides: the Black Faction, made up of Yggdmillennia members, and the Red Faction, mostly from the Mage's Association with one representative from the Church. The Grail also summons a Ruler to oversee the conflict.