In the Sombra timeline, Twilight Sparkle has failed her entrance test trying to open up Spikes dragon egg. distraught that her dreams were dashed and that harmonious magic had failed her, she concludes that disharmonious magic might be to her liking
When the former king returns, a shadow of his former self, he knows and desires one thing only. The death and suffering of he who inflicted this upon him. Spike.