Twilight Sparkle and her assistant Spike just came back from a lecture when they saw Starlight Glimmer in the throneroom. She held in her magic a scroll with a time charm.

Starlight Glimmer wanted to travel with this time charm and the map in Twilight`s castle to the past and change the destiny of Twilight and her Friends.

But something had gone wrong, because Sombra has dived has stolen the magic and used it himself to travel into the past. He wants to dominate his dark plan to rule Equestria.
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I apologize if you do not understand some. I have written this story with the google translator because I live in Germany and I'm not so good in English. I'm really sorry if this is the case.