Following an disaster in the Everfree Forest, Luna begins teaching Twilight about dream magic, in doing so they discover a threat to Equestria, an ancient Cult believed destroyed, and a new race of ponykind...

Be careful little fillies, for there are dangers in mortal dreams.

This fic takes place during mid season 4, I'm unsure weather to tag this "Alternate Universe" since it changes a few small things in Equestria's history, as well as nullifying future episodes.