King Sombra is a fictional character from the animated television series My Little Pony: Friendship Is Magic. He is depicted as a dark unicorn and the former ruler of the Crystal Empire, known for his malevolent nature and mastery of shadow magic. Sombra seeks to reclaim his lost kingdom and is characterized by his imposing presence and sinister ambitions. In the series, King Sombra first appears in the third season finale and serves as the primary antagonist. His backstory reveals that he was overthrown by the Crystal Ponies and imprisoned in darkness. Sombra's return poses a significant threat to the protagonists, particularly Twilight Sparkle and her friends.