Lord Tirek (simply known as Tirek) is one of the main antagonists of My Little Pony: Friendship Is Magic. He first appears as the main antagonist in the two-part Season 4 finale "Twilight's Kingdom". He will reappear in Season 8.
He is a destructive and powerful centaur with the ability to drain ponies' magic. Lord Tirek is a revamped version of the very first antagonist from the original My Little Pony cartoons. He is the elder brother of Scorpan. In the IDW comics, he is also the son of King Vorak and Queen Haydon and the elder brother of Scorpan.