There are dangerous creatures in Equestria. However, there are few who are the true monsters of this world.
There is Nightmare Moon, a mare of darkness forged in a princess' envy.
There is Queen Chrysalis, the ruler of the changelings, who surfaced only for love.
There is King Sombra, a leader who holds his subjects down with an iron hoof for one goal.
It was 1000 years ago when they came.
It was 1000 years ago when everything fell apart.