SFF

In a different timeline of Equestria, life settles down as Twilight Sparkle takes her new position as leader. But when a time traveler from another dimension ends up in the castle halls, the ponies find their peaceful season is quickly coming to an end.

Time traveler Wonder enters this dimenison with one goal in mind: to protect it from total destruction. But when the ponies of Equestria befriend her, she is forced to make a decision she tried to avoid: to sacrifice herself to save the universe, or to live another lifetime with the ponies she'll outlive.