On a stormy night at Sweet Apple Acres, the Cutie Mark Crusaders and thier friend Esbin Hoofwin have a sleepover at there treehouse. As they rumage through Big Mac's box of books, they soon discover a broken unicorns' horn in which Granny Smith soon tells the tale of General Smog. Later that night the four ponies heard a strange moaning throughout the farm and decide to investigate.
*Special thanks to Tsubaki Rehooved for proofreading and editing*
(One-shot fanfic based from my first fanfic titled, 'The Favor that Changed it All'. Between chapters 2 and 3. I recommend you read it first.)