In the cold icy lands of the Crystal Empire, Roams a black unicorn, weakened from an epic battle, a blizzard rolls in and he finds refuge in the caverns of the Empire, and there he waits for his time to come, a time of revenge.
After Nightmare Moon is released from her bonds to Luna, and Twilight is the new ruler. A war breaks out, and peace is shattered, and the fate of Equestria and her new ruler will be tested. This is the Trial of The Crown.
Many years have passed, since the initial event of Nightmare Moon, and the crowning of Princess Twilight, and the banishment of the Tantabest. However, happiness can never last when an old enemy awakens.