Twilight fails at solving a riddle and nearly destroys civilization... we think. Honestly, still not sure really WHAT happened, beyond the fact that she lost her bucking marbles. Oh yeah, something about a riddle. And Pinkie Pie. And insanity. Yeah.
Heart of my own heart, how can I let you go? Love of my life, why go where I cannot follow? Why must you leave me behind, to live on without you? My love, my love, what am I going to do without you?