Tsue to Tsurugi no Wistoria

Will Serfort completed his promise to his childhood friends to become one of the top magicians, Magia Vander. He is now on the top of a wizard tower and unable to use any of his spells. He lost the ability to use them. A professor from the Regarden Magical Academy sets him in a fight with dungeon Dragons and he finds himself useful. He tried his sword abilities on one of his professors who always bullied him.