I truly recommend reading DLairgkht World first before this.

Equestria. A pristine peaceful world that has been plugged into darkness due to the miss coordination of a purple unicorn known as Twilight and a vengeful creature that was hellbent on killing it's tortures. Now, with the princesses gone, Twilight has taken the role of a leader and looks forward to lead the country with her few remaining friends.

Meanwhile, Discord and Morbiss take this time to travel the chaos and war ridden world looking for a place to call a home while trying to figure out what to do about being the last of his kind.