Twilight Sparkle, the Princess of Friendship, is renowned across Equestria as being perhaps the greatest master of the arcane there could ever be. But Twilight herself knows that there is one pony who, despite not being an alicorn, has managed to successfully hold her own against her. So, despite years of friendship between them, Twilight decides that it's time she and her first student finally settle the question of who is truly the top mage.