Deuce Spade

Deuce Spade is a first-year student in Heartslabyul. He enrolled in the school aiming to become a powerful mage. He's very serious, but a little disorganized. Deuce used to be a delinquent in middle school, but vowed to clean up his act at Night Raven after he heard his mother secretly cry in a phone call to his grandmother. He takes a lot of time solving simple Math problems, such as easy algebra.

Deuce's Unique Magic is known as "Bet the Limit!". It allows him to throw another person's magic right back at them.

(Source: Twisted Wonderland Wiki)