A scene from My Little Pony: Revelations of the Apocalypse.
During the Battle of Canterlot, Sunburst decides to head on his own to save Starlight Glimmer, the mare that the unicorn stallion dearly loves who had just became Nyarlathotep's new host after being driven out of Stygian and later Silvermane. Starlight's anxiety and fear, along with her incredibly excessive magic reserves, is channeled to give Nyarlathotep an even larger and more terrifying form than before.
While Sunburst was exploring inside Nyarlathotep, he finally comes across Starlight and saves her. However, before they could make their escape, a familiar red horn that is also inside the Crawling Chaos' colossal body encounters the couple. With the Dark One's power swirling inside, it was able to manifest its natural form once more. To Starlight and Sunburst's horror, in front of them is the Unicorn of Darkness, the greatest enemy of the Crystal Empire himself, now more powerful and horrifying than ever… King Sombra!
Starlight Glimmer, Sunburst, King Sombra and My Little Pony: Friendship is Magic belong to © Hasbro