Twilight and the gang might have defeated the evil King Sombra and sent him back to the darkness from which he was once banished to, but that doesn't mean that the threat he represented was gone; no, far from it. With the origional magic that once contained him gone, the darker magic from the bygone era of cruelty slowly seeps back into Equestria, magic that seeks a new pony to weild it.
The magic of the Pony Grail War; a war waged around the posession of a single ancient artifact which grants its bearer a single wish, and the right to rule in the dark King's place; all the while the souls of bygone heros forced to fight on behalf of their conquest seeking masters, slaves to the persuit of the cup.
As the Princess of Friendship, Twilight Sparkle is aghast when she learns of the return of the Grail's dark corruption, but when she awakes to find herself branded with the Command Seals of a Master, she is left with only one option. She has to compete.

Author: Hello and welcome to this Fate/Stay Night and MLP:FiM crossover! Now, before we begin, I have a little housekeeping; while there may be OC/, I prommice that at least 4/7 of the masters will be cannon; I am using a custom set of servants and Noble Phantasms, so no Arturia, and none of that Rule Breaker shenanigans. Feel free to comment or leave feedback, any comment is always welcomed, and if you have nothing else, then just sit back, and I'll see you on the other side.