Twilight has been called to Canterlot to observe a dark magic that will throw Equestria out of balance. Something is attacking the Crystal Empire from the Frozen North. And a certain pony seeks redemption in the Badlands. All the ponies will face trials which they have never faced before.
I'm getting a case of White Walker / Others / that opening for A Game of Thrones de javu...
The prologue is based off of A Game of Thrones but they are not White Walkers or Others.