Nightmare Fuel / A Song of Ice, Fire and Heart

• The Heartless flooding Wintertown, especially when the guards report to Lady Stark and mention her daughters are there. Catelyn immediately runs to the stables to jump on a horse and go looking for her girls.
• Xion having to watch Dothraki publically rutting at Daenerys' wedding party. Remember, she's chronogically less than one year old and doesn't even know what sex is, making the scene even squickier. Then one warrior attempts to "ride" her, forcing the Keybearer to defend herself.
• Almost two decades after his rampage, Vanitas still is such an horrifying figure to Westeros that people refuse to say his name out loud. And he suddenly decides to reappear in the Hand's tournament in spite of having being killed, because as long as there is negative feelings in the multiverse he's effectively immortal.
  • His casual announcement that he's looking for "princesses", leading everyone to assume he wants to kidnap Arianne and Myrcella. It's even worse for the Martells since Vanitas previously attempted to murder Elia at Harrenhal — imagine the Serial Killer who tried to hurt your beloved sister being freed and wanting to make your niece his new target!
  • His teleporting in the heavily injured Robert's bedroom in order to mentally torture the dying king with the knowledge that he wasted his life on a lie since Lyanna never was abducted by Rhaegar, it was Robert's own flaws that drove her into the dragon prince's embrace. Then after breaking the King's morale, Vanitas casually murders him in his bed.