This story is a sequel to Flash Sentry, Crystal Darkness
After their battle with King Sombra, Flash and friends are hoping to go back to Ponyville and relax. However, things are never what they seem, as the Elements of Harmony soon find out that new adventures and threats are just around the corner. And as these encounters make themselves known, they soon find out that it'll take more than the Elements to take on these new enemies.
Edited by KingJoltik
Now on TVtropes