Tirek

(Voiced by Mark Acheson) an evil power hungry centur. And was banished to Tartarus, but after years later when Cerberus was out. It took time for him to suck away the magic from the ponies.

he even manipulated discord into helping him. But he betrays and sucks away discord's magic. He was fighting against twilight. And he sucks away her magic along with the magic the princess gave upon her,

but it wouldn't stop her and her friends. So they finally unlock the chest. And became all powered with the magic of true friendship. Which defeated tirek and send him back to Tartarus.

but in the team rainboom/team owl adventure series. It wouldn't last. Tirek was freed by venom. And was now on earth to help the Heylin side to destroy the princess of friendship as well.

he is now part of the Heylin side.