He stole Twilight's crown to become stronger and more powerful. When he put on the crown, he became Umarak the Destroyer and began to hypnotize the students into slaves. Once that was done, he tried to attack Twilight and her human friends, including Optimus, Tahu, and Sunset Shimmer. But they protected themselves with a force field and used the magic of friendship on Umarak, gaining pony ears, wings, longer hair resembling pony tails, and new armor in the process. Umarak was then transformed back into his Hunter self and regretted what he had done. Sunset Shimmer offered him a second chance at friendship since he didn't know the first thing about it.