miracle ball; magic ball
Baseball term for a pitch with an extraordinary, deceptive, or seemingly impossible movement, often used in manga and sports commentary.
彼の投げる魔球は、バッターの手前で急に落ちる。
His miracle ball drops sharply just in front of the batter.
In the manga, the protagonist unleashes his signature magic ball.
Compound of 魔 (ma, 'magic, demonic') and 球 (kyū, 'ball, sphere'). The term is strongly associated with baseball fiction and commentary, where it describes a pitch with extraordinary movement.