Beulah is in custody, but her "ex-sidekick," Raven, askes the team for help in their mission. Although apprehensive, Nightwing chooses to help the witches in exchange that they turn themselves over afterward.
Midway is another word for halfway. Nightwing speak of meeting Beulah and Raven halfway, by helping them. A midway is the area in a fair containing games and sideshows. This theme is referenced by carnival-like setting Klarion's consciousness was preoccupied by.