King Sombra's sentence changed from 1,000 years to eternity, the growing inbalance in time spreading as it undoes reality.The only person Dr. Whooves can turn to for help is his consort.If he can keep her from killing the Royal Pony Sisters, that is
The Seventh Doctor's visit to his former companion, Alicorn Celestia of Equestria, becomes a trek through the mind, dreams, and soul of Princess Luna to try and avert the crisis of Nightmare Moon.