
Twilight Sparkle never thought she'd see the day: the day that her mentor, Princess Celestia, would fall to the dark side...but now it's here. Now, she must call upon allies both from her reality and that of another to fight under the banner of the only pony who up until now had been able to challenge her: Princess Luna herself. It's about the only way she'd be able to help her now...
Takes place before Season 7; inspired by "Injustice: Gods Among Us"