He returns in season eight's two-part finale, "School Raze" when he helps Cozy Glow with her plan to drain all of the magic from Equestria to get revenge on Twilight and her friends by trapping themselves in Tartarus. The plan fails and Cozy is locked up in Tartarus with him. In season nine's two-part premiere, "The Beginning of the End", Tirek and Cozy are later freed by Grogar to join him in his plot to take over Equestria. After recovering Grogar's Bewitching Bell, Tirek, Chrysalis, and Cozy decide to work together to betray Grogar and take Equestria for themselves. In the season's two-part finale, "The Ending of the End", they use the magic of the Bewitching Bell to make themselves all-powerful and take over Equestria, but are eventually defeated by Twilight and her friends, as well as turned into stone as punishment for their crimes.Character designer Phil Caesar strove to make Tirek appear as intimidating as he could without being deemed "too scary" for younger audiences, giving him design elements such as a black upper body to "tone down the intensity". (voiced by Sunni Westbrook) – A pegasus filly and a former student of the School of Friendship. She first appears in season eight as a supporting character, until she reveals her true nature in the season's two-part finale, "School Raze" when she steals all of the magic from Equestria in a plot to rule it as the Empress of Friendship. She is foiled by the Young Six with the help of the Tree of Harmony and later imprisoned in Tartarus with Tirek, her partner in crime. In season nine's two-part premiere, "The Beginning of the End", Cozy and Tirek are later freed by Grogar to join him in his plot to take over Equestria. After recovering Grogar's Bewitching Bell, Cozy, Chrysalis and Tirek decide to work together to betray Grogar and take Equestria for themselves. In the season's two-part finale, "The Ending of the End", they use the magic of the Bewitching Bell to make themselves all-powerful and take over Equestria, as well as turning the three pony races against each other, but are eventually defeated by Twilight and her friends, as well as turned into stone as punishment for their crimes. Changeling characters (voiced by Kathleen Barr) – The former leader of the changelings, a race of insectoid shape-shifters that feed off of ponies' love for each other.