- Complete Monster:
- Nightmare, oh so much.
- Discord was already a borderline example in canon; according to Luna, this was him being playful, and that he was much worse when the Princesses fought against him long ago.
- Hilarious in Hindsight: Twilight being groomed to be a successor for the princesses rings pretty closely to the ending of the third season of the series, where she does get crowned a princess of Equestria and becomes an Alicorn.
- Moral Event Horizon:
- Literally everything Nightmare does is either this or a Kick the Dog moment.
- Discord apparently crossed it in the backstory, when he killed Celestia and Luna's parents — he Mind Raped them so far past the Despair Event Horizon that they simply lost the will to live and wasted away.
- Never Live It Down: In a humorous moment shortly before everything goes to hell, Twilight is shown worrying that this will happen in regards to her breakdown in "Lesson Zero".
- Tearjerker: In real life, the author's untimely passing.
- The Woobie: Several.