The changeling invasion had started it all. The idea of threatening the peaceful kingdom of Equestria. The idea that it could be taken.
Sombra's defeat was a stern warning to any others who dared threaten the land. But Tyrek was different. Tyrek had come closer than anyone to destabilizing Celestia, Luna, and Cadance, and the rest of the world watched as Equestria made another narrow escape. Watched and learned. New enemies are feeling more and more confident that the great land can fall. They are conspiring with others, and preparing their invasion forces. And the answer as to how to prevent this war, may lie in the origin of Celestia, and Luna themselves. Deep at the heart of Equestria.
Now the elements of harmony must journey to the farthest reaches of Equestria to ensure that their kingdom survives.

Princess Luna just wants things back to the way things were. Two months have passed since she was freed from Nightmare Moon. But it soon becomes clear that one cannot simply be 'freed'. Now Luna must prevent Nightmare from taking over again, while convincing her sister she is not a threat to Equestria.

Five years after dealing with Discord, everything seems to be going Rainbow Dash's way. But she suffers a crippling injury which forces her to give up her element, and costs her the ability to fly. Now, as a war with the changelings looms on the horizon, Scootaloo must take the element of loyalty. But will she be able to handle the responsibility? And will Rainbow Dash be able to reclaim the skies?
Loosely based on the graphic novel Batman: Knightfall

Discord returns from a long imprisonment in stone once more. He does this as Rainbow Dash faces a moment of weakness. Seeing an opportunity, he plots to destroy both her reputation, and her sanity, and step over the other five to take back the throne. Meanwhile, Rainbow Dash must wrestle with the idea of mentoring the flightless filly, Scootaloo, as well as dealing with nightmares created by Discord to break her down.