Anyway, the link to the story is at the bottom of the description for those who haven't already checked it out.
When pursuing Starlight, Twilight and Spike experienced variances of Equestria, and saw how the river of time could have been different. Now, Starlight has moved in with Twilight, Nyx, and Spike in their crystalline home and has begun her studies in friendship. To thank those who have helped her embrace friendship once more, Starlight has created an enchantment that allows the castle’s map table to let anyone glimpse other variances of reality.
The power to ask “what if,” can be a source of great amusement… but for some, the hypotheticals are haunting reminders of what could have been.