Midnight Sparkle

Summary
Midnight Sparkle is the demonic form of Twilight Sparkle, manifested after Twilight released a large concentration of Equestrian magic during the Friendship Games competition between Crystal Prep and Canterlot High School. Although not in physical form, she continued to torment Twilight in her dreams, making her afraid to use her new magical abilities. It was during a crisis at Camp Everfree that Midnight was finally subdued, no longer tormenting Twilight.