MLP x Fate/Stay Night Crossover, knowledge of Fate/Stay Night is not required.
Art drawn by Co-Creator Kul

The Holy Grail War, an ancient ritual in which Magi summon ancient Heroic Spirits in order to compete for an omnipotent wishing device. Every 60 years, 7 Masters are chosen by the grail to compete, and in Canterlot the 4th Holy Grail War is about to begin.

When Twilight Sparkle was a child, the only thing she wanted to do was become a great Magus that her parents could be proud of. However, after a traumatizing incident, she finds her magic circuits trashed and her body severely weakened. Now living alone in Canterlot City as the current head of the Sparkle family, Twilight struggles to learn what magic she can without her body destroying itself in the process.

Wanting to just live a quiet, peaceful life, Twilight was going to stay out of the Holy Grail War. However, when the circumstances surrounding her drag her into the flames of war by force, she must decide if she will stand and fight, or run to safety. With the help of her childhood friend and a powerful Servant at her side, the Grail War might just be survivable.