Humanity's space exploration ultimately took the form of billions of identical probes, capable of building anything (including astronauts themselves) upon arrival at their destinations. One lands in Equestria. Things go downhill from there.
On a clear night, a certain changeling mother makes her way while under hot pursuit to the newly built Temple of the Sun in the Crystal Empire. Her kingdom is shattered, her loyal followers are few and scattered. What does she want?
The Witch, to some a faerie, to most just a tale the tell kids to stay away from the Everfree. Twilight Sparkle had been alive for thousands of years, she has met and even taught many individuals but for the last one hundreds years, none have come in
Shining Armor finds a hole in his hoof. It goes all the way through and, along with other recent changes, makes him believe he is turning into a changeling!