In the land of Amestris; conspiracy, corruption, and a war in secret stirs within the vicinity of Alchemists and Magi. A Ruler-class Servant comes as the mediator of the war for the Holy Grail, and her meeting with the Fullmetal Alchemist defines the fates that theirs, and others, have intertwined.

There was a rumour of a steel grey eyed Ishvalan who was able to perform unprecedented miracles, some of which alchemists couldn't even hope to replicate.

what if truth's cost wasnt just alchemy what if fem ed had to solve problems for another world to join her family again changed from fate stay night to fate grand order Ediline x servant reverse harem on hold for further notice

Everyone has their own reasons for the Holy Grail to chose them to become a Master in the War. Whether it's restoring their brother's body, bringing their parents back to life, winning the battle, protecting their people, conquering the world, or causing absolute mayhem, every Master has their desires. But what none of them count on is their Servant's desires. (FMA/Fate Zero AU)

The Third True Magic, the Heaven's Feel, allows for the materialization of the soul. It belonged to the Einzbern family, who focused solely on alchemy. It stands to reason that the Heaven's Feel is also some form of alchemy. When Illya von Einzbern enacts an incomplete version of it to save the life of a loved one, she opens the "Gate of Heaven." Yeah, this isn't going to end well.

To obtain something…something of equal or greater value must be given in return. The Holy Grail was created to end that absolute. The Philosopher's Stone was created in the constraints of that absolute. But Magic requires a price…an ultimate miracle created by man needs a sacrifice. To obtain something…something of equal or greater value must be given in return. That is an Absolute

welcome one and all you must pick a third to go with fate stay and full metal alchemist that's your challenge

Truth needed someone to act in it's place. So it used the fragment Fullmetal left behind when he hoped between worlds, and turned it into it's own private agent of chaos. Too bad Alaya snagged it first before it could be used. Until now. Shirou Emiya learns from the mistakes of his Servant self, and says no to Alaya's deal, giving him a second chance to do things right. Poor world.

A little bit of insanity, Shirou, a pair of gloves and a nice, big explosion. My take on how Shirou could overcome one of Projections more glaring weaknesses. *Now a Series*