Night of the Shy/YMMV

• 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.
• 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.