princess luna

In this timeline the invasion went off without a hitch, all four princesses were captured and the ponies were enslaved! When the Storm King betrayed her she managed to grab the Staff of Sacanas and used it to eliminate the treacherous king. After she carved and reformed the staff into a powerful new horn she turned the shattered remains of the formal rulers into a suitable throne. She ruled Equestria with an iron hoof for all of a month until Discord got back from his vacation and upon finding out what she did he turned her into a trout and fixed the princesses… What? that's why it's a bad ending, Tempest Trout got ate by a bear.

Sickly clouds made an angry yellow smear of the sun. Voiceless whispers crawled across ancient stone while shadows stabbed at any light foolish enough to touch the ground. Luna knew not how she had gotten here, only that it was some un-dream that should not be. A place as real as any other, a place which made mockery of dream and reality alike. A place forgotten, or perhaps one which demands forgetting. A dream not born of any mind, but traveled by minds lost.

A dream forbidden. For some dreams should never be seen.

An uncertain defiance settled upon her shoulders. Whatever the place, she had found it through her domain. The task set before her was one she could not ignore.